 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| smsc USB2422 datasheet revision 1.0 (06-04-13) datasheet product features general description the smsc USB2422 hub is a low-power, single transaction translator, hub controller ic with two downstream ports for embedded usb solutions. the smsc hub controller can attach to an upstream port as a hi-speed and full-speed hub or as a full-speed only hub. the smsc hub supports low-speed, full-speed, and hi-speed (when configured as a hi-speed hub) downstream devices on the enabled downstream ports. all required resistors on the usb ports are integrated into the hub. this includes all series termination resistors on d+ and d- pins and all required pull-down and pull-up resistors on d+ and d- pins. the over-current sense inputs for the downstream facing ports have internal pull-up resistors. features ? supports the usb battery charging specification, revision 1.1 ? fully integrated usb termination and pull-up/pull- down resistors ? supports a single external 3.3 v supply source; internal regulators provide 1.2 v internal core voltage ? on-chip driver for 24 mhz crystal resonator or external 24 mhz clock input ? esd protection up to 6 kv on all usb pins ? supports self-powered operation ? smsc hub contains a built -in default configuration; no external configuration options or components are required ? downstream ports as non-removable ports ? downstream port power control and over-current detection on an individual or ganged basis ? supports compound devices on a port-by-port basis ? 24-pin sqfn (4x4 mm), rohs-compliant package ? commercial temperature range support: 0oc to +70oc ? industrial temperature range support: -40oc to +85oc highlights ? high performance, low-power, small footprint hub controller ic with two downstream ports ? fully compliant with the usb 2.0 specification ? optimized for mini mal bill-of-materials and low-cost designs applications ? lcd monitors and tvs ? multi-function usb peripherals ? pc motherboards ? set-top boxes, dvd players, dvr/pvr ? printers and scanners ? pc media drive bay ? portable hub boxes ? mobile pc docking ? embedded systems ? gaming consoles ? cable/dsl modems ? hdd enclosures ? kvm switches ? server front panels ? point-of-sale (pos) systems ? ip telephony ? automobile/home audio systems ? thin client terminals USB2422 2-port usb 2.0 hi-speed hub controller
2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 2 smsc USB2422 datasheet copyright ? 2013 smsc or its subsidiaries. all rights reserved. circuit diagrams and other information relating to smsc produc ts are included as a means of illustrating typical applications. consequently, complete information sufficient for construction purposes is not necessarily given. although the information has been checked and is believed to be accurate, no re sponsibility is assumed for inaccuracies. smsc reserves the right to make changes to specifications and produc t descriptions at any time without notice. contact your local sm sc sales office to obtain the latest specifications before placing your product order. the provision of this inform ation does not convey to the purchaser of the described semicond uctor devices any licenses under any patent rights or other intellectual property rights of smsc or others. all sales are expressly conditional on your agreement to the te rms and conditions of the most recently dated version of smsc's standard terms of sale agreement dated before the date of your order (the "terms of sale agreement"). the pro duct may contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. anomaly sheets are availab le upon request. smsc products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. any and all such uses without prior written approval of an officer of smsc and further testing and/or modification will be fully at the risk of the customer. copies of this document or other smsc literature, as well as the terms of sale agreement, may be obtained by visiting smsc?s website at h ttp://www.smsc.com. smsc is a registered trademark of standard microsystems corporation (?smsc?). product names and company names are the trademarks of their respective holders. the microchip name and logo, and the microchip logo are registered trademarks of microchip technology incorporated in the u.s.a . and other countries. smsc disclaims and excludes any and all warrant ies, including without limi tation any and all implied warranties of merchantabil ity, fitness for a particular purpose, title, a nd against infringement and the like, and any and all warranties arising from any cou rse of dealing or usage of trade. in no event shall smsc be liable for any direct, incidental, indi rect, special, punitive, or cons equential damages; or for lost data, profits, savings or revenues of any kind; regardless of the form of action, whether based on contrac t; tort; negligence of smsc or others; strict liability; breach of wa rranty; or otherwise; whether or not any remedy of buyer is h eld to have failed of its essential purpose, and whether or not smsc has been advised of the possibility of such damages. order numbers: this product meets the halogen maximum concentration values per iec61249-2-21 for rohs compliance and environmen tal information, please visit www.smsc.com/rohs please contact your smsc sales representative fo r additional documentation related to this product such as application notes, anomaly sheets, and design guidelines. order numbers rohs compliant package temp. range reel size USB2422/mj 24-pin sqfn 4 x 4 mm 0oc to +70oc - USB2422t/mj 0oc to +70oc 4000 USB2422-i/mj -40oc to +85oc - USB2422t-i/mj -40oc to +85oc 4000 conventions within this manual, the following abbreviations and symbols are used to improve readability. example description bit name of a single bit within a field field.bit name of a single bit (bit) in field x?y range from x to y, inclusive bits[m:n] groups of bits from m to n, inclusive pin pin name zzzzb binary number (value zzzz) 0xzzz hexadecimal number (value zzz) zzh hexadecimal number (value zz) rsvd reserved memory lo cation. must write 0, read value indeterminate code instruction code, or api function or parameter section name section or document name x don?t care 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 4 smsc USB2422 datasheet table of contents chapter 1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 chapter 2 pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2 pin table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3 pin descriptions (grouped by function). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.4 buffer type descriptio ns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.5 strap pin configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.5.1 non-removable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.5.2 internal pull-down (ipd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.5.3 led . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.6 example applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 chapter 3 battery charging support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.1 usb battery charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.1.1 special behavior of prtpwr pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.2 battery charging configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 3.2.1 battery charging enabled via smbus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 chapter 4 configuration options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.1 hub configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.2 resets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.2.1 external hardware r eset_n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.2.2 usb bus reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.3 smbus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.3.1 smbus slave address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 4.3.2 protocol implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.3.3 slave device timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.3.4 stretching the sclk signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.3.5 smbus timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.3.6 bus reset sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.3.7 smbus alert response address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.4 smbus registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4.4.1 vendor id least significant bit register (vidl) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.4.2 vendor id most significant bit register (vidm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.4.3 product id least significant bit register (pidl) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.4.4 product id most significant bit register (pidm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.4.5 device id least significant bit register (didl). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.4.6 device id most significant bit register (didm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.4.7 configuration data byte 1 register (cfg1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 4.4.8 configuration data byte 2 register (cfg2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4.4.9 configuration data byte 3 register (cfg3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 4.4.10 non-removable device register ( nrd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 4.4.11 port disable for self-powered operation register (pds) . . . . . . . . . . . . . . . . . . . . . . . . 31 4.4.12 port disable for bus-powered operation register (pdb) . . . . . . . . . . . . . . . . . . . . . . . . 31 4.4.13 max power for self-pow ered operation register (maxps) . . . . . . . . . . . . . . . . . . . . . . 32 4.4.14 max power fo r bus-powered operati on register (maxpb) . . . . . . . . . . . . . . . . . . . . . . 32 4.4.15 hub controller max current fo r self-powered operation register (hcmcs) . . . . . . . . . 32 4.4.16 hub controller max power for bus-powered op eration register (hcmcb) . . . . . . . . . . 33 4.4.17 power-on time register (pwrt) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.4.18 language id high register (langidh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 5 revision 1.0 (06-04-13) datasheet 4.4.19 language id low register (langidl) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.4.20 manufacturer string length register (mfrsl) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 4.4.21 product string length register (prdsl) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 4.4.22 serial string length register (sersl) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 4.4.23 manufacturer string registers (manstr) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 4.4.24 product string registers (prdstr) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 4.4.25 serial string registers (serstr) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 4.4.26 battery charging enable register (bc_en) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 4.4.27 boost upstream register (boostup) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 4.4.28 boost downstream register (boost40) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 4.4.29 port swap register (prtsp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 4.4.30 port 1/2 remap register (prtr12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 4.4.31 status/command register (stcd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 chapter 5 dc parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 5.1 maximum guaranteed ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 5.2 operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 5.2.1 pin capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 chapter 6 ac specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 6.1 oscillator/crystal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 6.2 external clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 6.2.1 usb 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 6.3 smbus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 chapter 7 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 chapter 8 datasheet revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 6 smsc USB2422 datasheet list of figures figure 1.1 USB2422 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 figure 2.1 USB2422 24-pin sqfn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 figure 2.2 non-removable pin strap example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 2.3 ipd pin strap example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 2.4 led pin strap example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 2.5 example application - soc based design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 2.6 example application - non-soc based design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 3.1 battery charging via external power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 figure 4.1 hub configuration timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 4.2 block write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 4.3 block read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 figure 5.1 supply rise time model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 figure 6.1 typical crystal circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 figure 6.2 formula to find the value of c1 and c2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 figure 7.1 24-sqfn package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 figure 7.2 recommended pcb land pattern. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 figure 7.3 taping dimensions and part orientat ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 figure 7.4 reel dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 figure 7.5 tape length and part quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 7 revision 1.0 (06-04-13) datasheet list of tables table 2.1 USB2422 pin table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 2.2 USB2422 pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 table 2.3 buffer type descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 2.4 strap option summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 2.5 example applications - resistor/capacitor values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 table 4.1 hub configuration options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 table 4.2 hub configuration timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 table 5.1 dc electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 table 5.2 pin capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 table 6.1 crystal circuit legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 table 7.1 24-sqfn dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 table 8.1 customer revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 8 smsc USB2422 datasheet chapter 1 block diagram figure 1.1 USB2422 block diagram to upstream v bus 3.3v upstream phy upstream usb data repeater controller sie serial interface pll 24 mhz crystal to smbus master routing & port re-ordering logic smbclk smbdata port controller bus-power detect/v bus pulse tt phy#1 port #1 oc sense switch driver phy#2 port #2 oc sense switch driver usb data downstream oc sense switch usb data downstream oc sense switch crfilt pllfilt 1.2v reg 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 9 revision 1.0 (06-04-13) datasheet chapter 2 pin descriptions this chapter is organized by a se t of pin configurations followed by a corresponding pin list organized by function according to their associated interface. a detailed description list of each signal (named in the pin list) is organized by function in table 2.2, ?USB2422 pin descriptions,? on page 11 . refer to table 2.3, ?buffer type descriptions,? on page 14 for a list of buffer types. an n at the end of a signal name indicates that the active (asserted) state occurs when the signal is at a low voltage level. when the n is not present, the signal is asserted when it is at a high voltage level. the terms assertion and negation are used exclusively in order to avoid confusion when working with a mixture of active low and active high signals . the term assert, or asse rtion, indicates that a signal is active, independent of whether that level is represented by a high or low voltage. the term negate, or negation, indicates that a signal is inactive. 2.1 pin configuration figure 2.1 USB2422 24-pin sqfn thermal slug (must be connected to vss) 12 11 10 9 8 7 usbdp_up 19 xtalout/(clkin_en) 20 xtalin/clkin 21 rbias 24 23 pllfilt 22 1 vdd33 2 usbdp_dn1/prt_dis_p1 3 usbdm_dn2/prt_dis_m2 4 usbdp_dn2/prt_dis_p2 5 6 usbdm_dn1/prt_dis_m1 nc usbdm_up 17 susp_ind/local_pwr/(non_rem0) 16 vbus_det reset_n 15 14 smbclk/cfg_sel0 vdd33 18 13 smbdata/non_rem1 indicates pins on the bottom of the device. ocs1_n prtpwr1/(bc_en1) vdd33 crfilt prtpwr2 ocs2_n smsc USB2422 (top view sqfn-24) 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 10 smsc USB2422 datasheet 2.2 pin table table 2.1 USB2422 pin table upstream usb 2.0 interfaces (3 pins) usbdm_up usbdm_up vbus_det downstream 2-port usb 2.0 interfaces (9 pins) usbdp_dn1/ prt_dis_p1 usbdm_dn1/ prt_dis_m1 usbdp_dn2/ prt_dis_p2 usbdm_dn2/ prt_dis_m2 prtpwr1/ bc_en1 prtpwr2 ocs1_n ocs2_n rbias serial port interface (2 pins) smbdata/ non_rem1 smbclk/ cfg_sel misc (5 pins) xtalin/ clkin xtalout/ clkin_en reset_n susp_ind/ local_pwr/ non_rem0 nc power, ground, and no connects (5 pins) (3) vdd33 crfilt pllfilt vss total 24 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 11 revision 1.0 (06-04-13) datasheet 2.3 pin descriptions (grouped by function) table 2.2 USB2422 pin descriptions pin # symbol buffer type description upstream usb 2.0 interfaces 19 20 usbdm_up usbdp_up io-u usb bus data: connect to the upstream usb bus data signals (host, port, or upstream hub). 16 vbus_det i detect upstream vbus power: detects the state of upstream vbus power. the smsc hub monitors vbus_det to determine when to assert the internal d+ pull-up resistor (signalling a connect event) when designing a detachable hub, this pin should be connected to vbus on the upstream port via a 2:1 voltage divider. two 100 k resistors are suggested. for self-powered applications with a permanently attached host, this pin must be connected to a dedicated host control output, or connected to the 3.3 v domain that powers the host (typically vdd33 ). downstream usb 2.0 interfaces 5 3 and 4 2 usbdp_dn[2:1]/ prt_dis_p[2:1] and usbdn_dn[2:1]/ prt_dis_m[2:1] io-u hi-speed usb data: connect to the downstream usb peripheral devices attached to the hub?s ports. port disable strap option: if this strap is enabled by pack age and configuration settings (see table 4.1, "hub configuration options" ), this pin will be sampled at reset_n negation to determine if the port is disabled. both usb data pins for the corresponding port must be tied to vdd33 to disable the associated downstream port. 7 prtpwr1/ o12 usb power enable: enables power to usb peripheral dev ices that are downstream, where the hub supports active high power controllers only. bc_en1 ipd battery charging strap option: port 1 pin will be sampled at reset_n negation to determine if port 1 supports the battery charging pr otocol (and thus the supporting external port power controllers) that would enable a device to draw the currents per the usb battery charging specification . this pin has an internal pull-down that will be removed after the strap option hold time is completed. bc_en1= 1: battery charging feat ure is supported for port 1 bc_en1= 0: battery charging feature is not supported for port 1 11 prtpwr2 o12 usb power enable: enables power to usb peripheral dev ices that are downstream, where the hub supports active high power controllers only. 8 12 ocs1_n ocs2_n ipu over-current sense: input from external current m onitor indicating an over-current condition. this pin contains an internal pull-up to the 3.3 v supply. 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 12 smsc USB2422 datasheet 24 rbias i-r usb transceiver bias: a12.0 k (+/- 1%) resistor is attached from ground to this pin to set the transceiver?s internal bias settings. serial port interface 13 smbdata i/osd12 system management bus data non_rem1 non-removable port strap option: this pin is sampled (in conjunction with susp_ind/non_rem0 ) at reset_n negation to determine if ports [2:1] contain permanently attached (non-removable) devices: non_rem[1:0] = 00 : all ports are removable non_rem[1:0] = 01 : port 1 is non-removable non_rem[1:0] = 10 : ports 1 and 2 are non-removable non_rem[1:0] = 11 : reserved see section 2.5, "strap pin configuration" for details. 14 smbclk/ i/osd12 system management bus clock cfg_sel configuration select: the logic state of this multifuncti on pin is internally latched on the rising edge of reset_n ( reset_n negation), and will determine the hub configuration method as described in table 4.1 . misc 22 xtalin/ clkin iclkx 24 mhz crystal or external clock input: this pin connects to either one terminal of the crystal or to an external 24 mhz clock when a crystal is not used. 21 xtalout oclkx crystal output: this is the other terminal of the cryst al circuit with 1.2 v p-p output and a weak (< 1 ma) driving strength. when an external clock source is used to drive xtalin/clkin , leave this pin unc onnected, or use with appropriate caution. 15 reset_n is reset input: the system must reset the chip by dr iving this input low. the minimum active low pulse is 1 s. 6 nc ipd treat as a no connect pin or co nnect to ground. no trace or signal should be routed or attached to this pin. table 2.2 USB2422 pin descriptions (continued) pin # symbol buffer type description 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 13 revision 1.0 (06-04-13) datasheet 17 susp_ind i/o12 suspend indicator: indicates the usb state of the hub. negated : unconfigured, or configured and in usb suspend asserted : hub is configured, and is active (i.e., not in suspend) local_pwr local power: this input selects whether the hub r eports itself as bus or self-powered when dynamic power switching is enabled via the dynamic power enable (dynamic) bit of the configuration data byte 2 register (cfg2) . this pin is sampled at por/reset before the usb hub attach command is sent. once the hub ha s entered the attach state (as indicated by the usb attach and write protect (usb_attach) bit of the status/command register (stcd) ), this pin cannot be changed. low : self/local power source is not available (i.e., the hub gets all power from the upstream usb vbus). high : self/local power source is available. note: never tie this pin directly to vdd33 , as doing so may cause it to act as susp_ind . note: this pin assumes the meaning of local power input only if properly configured via smbus. if the hub is configured via straps, it is non_rem0 at reset and susp_ind after reset. (non_rem0) non-removable port strap option: this pin is sampled (in conjunction with susp_ind/non_rem0 ) at reset_n negation to determine if ports [2:1] contain permanently attached (non-removable) devices: non_rem[1:0] = 00 : all ports are removable non_rem[1:0] = 01 : port 1 is non-removable non_rem[1:0] = 10 : ports 1 and 2 are non-removable non_rem[1:0] = 11 : reserved see section 2.5, "strap pin configuration" for details. power, ground, and no connects 1 9 18 vdd33 3.3 v power to the chip. a 1.0 f low-esr capacitor to vss is re quired on pin 9 as close as possible to the pin. a 0.1 f low-esr capacitor to vss is required on pin 1 as close as possible to the pin. 10 crfilt vdd core regulator filter capacitor: this pin requires a 1.0 f low-esr capacitor to vss for proper operation. 23 pllfilt pll regulator filter capacitor: this pin can have up to a 0.1 f low-esr capacitor to vss, or be left unconnected. vss ground pad/epad: the package slug is the only vss for the device and must be tied to ground with multiple vias. table 2.2 USB2422 pin descriptions (continued) pin # symbol buffer type description 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 14 smsc USB2422 datasheet 2.4 buffer type descriptions 2.5 strap pin configuration if a pin's strap function is enabled through hub configuration selection ( ta b l e 4 . 1 ), the strap pins must be pulled either high or low using the values provided in ta b l e 2 . 4 . each strap option is dependent on the pin?s buffer type, as outlined in the sections that follow. 2.5.1 non-removable if a strap pin?s buffer type is i/o, an external pull-up or pull-down must be implemented as shown in figure 2.2 . use strap high to set the strap option to 1 a nd strap low to set the strap option to 0. when implementing the strap low option, no additional components are needed (i.e., the internal pull-down provides the resistor) figure 2.2 non-removable pin strap example table 2.3 buffer type descriptions buffer description i/o input/output ipd input with internal weak pull-down resistor ipu input with internal weak pull-up resistor is input with schmitt trigger i/o12 input/output buffer with 12 ma sink and 12 ma source iclkx xtal clock input oclkx xtal clock output i-r rbias i/o-u analog input/output def ined in usb specification table 2.4 strap option summary strap option resistor value buffer type notes non-removable 47 - 100 k i/o internal pull-down (ipd) 10 k ipd ? only applicable to port power pins ? contains a built-in resistor led 47 - 100 k i/o hub i/o strap pin strap high +v hub i/o strap pin strap low gnd r k r k 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 15 revision 1.0 (06-04-13) datasheet 2.5.2 internal pull-down (ipd) if a strap pin?s buffer type is ipd, one of the two hardware configurations outlined in figure 2.3 must be implemented. use the strap high configuration to set the strap option value to 1 and strap low to set the strap option value to 0. figure 2.3 ipd pin strap example 2.5.3 led if a strap pin?s buffer type is i/o and shares func tionality with an led, the hardware configuration outlined below must be implemented. the internal lo gic will drive the led appropriately (active high or low) depending on the sampled strap option. use th e strap high configuration to set the strap option value to 1 and strap low to set the strap option to 0. figure 2.4 led pin strap example hub hub ipd strap pin strap high r k +v vss ipd strap pin strap low vss hub strap pin led/ strap high hub strap pin led/ strap low r k r k 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 16 smsc USB2422 datasheet 2.6 example applications figure 2.5 and figure 2.6 depict example applications for an soc based design and a non-soc based design, respectively. the corresponding resistor and capacitor values for these examples are provided in ta b l e 2 . 5 . figure 2.5 example application - soc based design figure 2.6 example application - non-soc based design embedded device soc USB2422 smbclk smbdata reset_n xtalout xtalin susp_ind rbias vdd33 (1,9,18) pllfilt crfilt n/c prtpwr1 ocs1_n usbdp_dn1 usbdm_dn1 prtpwr2(11) ocs2_n(12) usbdp_dn2 usbdm_dn2 gnd r bias c byp c outcr c outpll vcc usb switch enable fault_n reset_n clock vbus_det usbdp_up usbdm_up connector 3.3v usb connector r vbus r vbus USB2422 vbus_det usbdp_up usbdm_up cfg_sel0(14) non_rem1(13) reset_n xtal1(22) xtal2(21) non_rem0(17) rbias vdd33 (1,9,18) pllfilt crfilt n/c prtpwr2(11) ocs2_n(12) usbdp_dn2 usbdm_dn2 prtpwr1 ocs1_n usbdp_dn1 usbdm_dn1 gnd r2 r2 r bias c byp c outcr c outpll usb connector charger enabled port non-removable device r vbus r vbus r2 vcc vcc r1 vcc 24mhz power switch cx cx 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 17 revision 1.0 (06-04-13) datasheet note 2.1 c outcr should be placed as close as possible to pin 9 note 2.2 c outpll should be placed as close as possible to pin 1 table 2.5 example applications - resistor/capacitor values designator value r1 20 k r2 50 k cx 18 pf c byp 1.0 uf c outcr 1.0 uf ( note 2.1 ) c outpll 0.1 uf ( note 2.2 ) r bias 12 k r vbus 100 k 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 18 smsc USB2422 datasheet chapter 3 battery charging support the USB2422 smsc hub provides support for battery charging devices on a per port basis in compliance with the usb battery charging specification, revision 1.1 . the hub can be configured to individually enable each downstream port for batter y charging support either via pin strapping (port 1 only) as illustrated in figure 3.1 or by setting the corresponding configuration bits via smbus ( section 4.1 on page 20 ). figure 3.1 battery charging via external power supply note: r strap enables battery charging. 3.1 usb battery charging a downstream port enabled for battery charging turns on port power as soon as the power on reset and hardware configuration process has comple ted. the hub does not need to be enumerated nor does vbus_det need to be asserted for the port power to be enabled. these conditions allow battery charging in s3, s4, and s5 system power states as well as in the fully operat ional state. the usb battery charging specification does not interfere with standard us b operation, which allows a device to perform battery charging at any time. a port that supports battery charging must be able to support 1.5 amps of current on vbus. standard usb port power controllers typically only allow for 0. 8 amps of current before detecting an over-current condition. therefore, the 5 volt power supply, port power controller, or over-current protection devices must be chosen to handle the larger current demand compared to standard usb hub designs. 3.1.1 special behavi or of prtpwr pins the USB2422 enables vbus by asserting the port power ( prtpwr[2:1] ) as soon as the hardware configuration process has completed. if th e port detects an over-current condition, prtpwr[2:1] will be turned off to protect the circuitry from overloading. if an over-current condition is detected when the hub is not enumerated, prtpwr[2:1] can only be turned on from the host or if reset_n is toggled. these behaviors provide battery charging even when the hub is not enum erated and protect the hub from sustained short circuit conditions. if the short circuit condition persists when the hub is plugged into a host system the user is notified that a port has an over-current condition. otherwise prtpwr[2:1] turned on by the host syst em and the ports operate normally. USB2422 usb port power controller in en flag vbus 5.0 v 3.3 v r strap prtpwr1 ocs x _n 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 19 revision 1.0 (06-04-13) datasheet 3.2 battery charging configuration the battery charging option can be configured in one of two ways: ? when the hub is brought up in th e default configuration with stra pping options enabled, with the prtpwr1/bc_en1 pin configured (port 1 only). see the following sections for details: section 2.3: pin descriptions (grouped by function) on page 11 section 2.5: strap pin configuration on page 14 ? when the hub is initialized fo r configuration over smbus. 3.2.1 battery charging enabled via smbus register memory map location 0xd0 is allocated for battery charging support. the battery charging register at location 0xd0 starti ng from bit 1 enables battery charging for each downstream port when asserted. bit 1 represents port 1, and bit 2 represents port 2. each port that has battery charging enabled asserts the corresponding prtpwr[2:1] pin. 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 20 smsc USB2422 datasheet chapter 4 configuration options smsc?s usb 2.0 hub is fully compliant with the usb specification [1] . refer to chapter 10 (hub specification) for general details re garding hub operation and functionality. the hub provides one transaction translator (tt) th at is shared by both do wnstream ports (defined as single-tt configuration). the tt contains 4 non-periodic buffers. 4.1 hub configuration the USB2422 only supports internal defaults with the exception of the non-removable strap option (using non_rem[1:0] ). the hub internal default settings are as follows: ? internal default configuration wi thout over-rides ? strap options enabled ? self-powered operation enabled ? individual power switching ? individual over-current sensing 4.2 resets there are two device resets: a hardware reset via reset_n , and a usb bus reset. 4.2.1 external hardware reset_n a valid hardware reset is defined as assertion of reset_n for a minimum of 1 s after all power supplies are within operating range. while reset is asserted, the hub (and its associated external circuitry) consumes less than 500 a of current from the upstream usb power source. assertion of reset_n causes the following: 1. all downstream ports are disabled. 2. the prtpwr power to downstream devices is turned on when battery charging is enabled for a specific port, and removed when battery ch arging is disabled for a specific port. 3. the phys are disabled, and the differential pairs will be in a high-impedance state. 4. all transactions immediately terminate; no states are saved. 5. all internal registers return to the default state (in most cases, 00h). 6. the external crystal oscillator is halted. table 4.1 hub configuration options cfg_sel description 0 default configuration: ? strap options enabled ? hub descriptors indicate the hub as ?self-powered? 1 the hub is configured externally over smbus (as an smbus slave device with address 0101100b): ? strap options disabled ? self-powered or bus-powered depending on register settings ? all registers configured over smbus 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 21 revision 1.0 (06-04-13) datasheet 7. the pll is halted. 4.2.1.1 hub configuration ti ming for strapping option figure 4.1 hub configuration timing note: all power supplies must have reached the operating levels mandated in chapter 5, dc parameters , prior to (or coincident with) the assertion of reset_n . 4.2.2 usb bus reset in response to the upstream port signaling a reset to the hub, the hub does the following: 1. sets default address to 0 . 2. sets configuration to unconfigured. 3. the prtpwr power to downstream devices is turned on when battery charging is enabled for a specific port, and removed when battery ch arging is disabled for a specific port. 4. clears all tt buffers. 5. moves device from suspended to active (if suspended). table 4.2 hub configuration timing name description min typ max units t1 reset_n asserted 1 sec t2 strap setup time 16.7 nsec t3 strap hold time 16.7 1400 nsec t4 hub outputs driven to inactive logic states 1.5 2 sec t5 usb attach (see note) 3 sec t6 host acknowledges attach and signals usb reset 100 msec t7 usb idle undefined msec t8 completion time for requests (with or without data stage) 5 msec t1 t4 t5 t6 t7 t8 valid driven by hub if strap is an output reset_n vss non_rem[1:0] vss hardware reset asserted read non_rem[1:0] drive strap outputs to inactive levels attach usb upstream attach debounce interval idle start completion request response t2 t3 don?t care don?t care 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 22 smsc USB2422 datasheet 6. complies with section 11.10 of the usb 2.0 specification for behavior after completion of the reset sequence. the host then configures the hub and t he hub?s downstream port devices in accordance with the specification. the hub does not propagate the upstream usb reset to downstream devices. 4.3 smbus the smsc hub can be configured by an exter nal processor via an smbus interface (see ta b l e 4 . 1 for details on enabling the smbus interface). the smsc hub waits indefinitely for the smbus code load to complete and only appears as a newly connected device on usb after the code load is complete. the hub?s smbus acts as a slave-only smbus de vice. the implementation only supports block write ( section 4.3.2.1 ) and block read ( section 4.3.2.2 ) protocols. reference the system management bus specification [2] for additional information. refer to section 4.4, "smbus registers," on page 24 for details on all smbus accessible registers. 4.3.1 smbus slave address the 7-bit slave address is 0101100b. the hub will not respond to the general call address of 0000000b. 4.3.2 protocol implementation typical block write and block read protocols are shown in figures 4.2 and 4.3 . register accesses are performed using 7-bit slave addressing, an 8-bit regist er address field, and an 8-bit data field. the shading shown in the figures during a read or write indicates the hub is driving data on the smbdata line; otherwise, host data is on the smbdata line. the smbus slave address assigned to the hub (0101100 b) allows it to be identified on the smbus. the register address field is the internal address of the register to be accessed. the register data field is the data that the host is attempting to write to t he register or the contents of the register that the host is attempting to read. note: data bytes are transferred msb first. 4.3.2.1 block write/read the block write begins with a slave address and a write condition. after the command code, the host issues a byte count which describes how many more bytes will follow in the message. if a slave had 20 bytes to send, the first byte would be the number 20 (14h), followed by the 20 bytes of data. the byte count may not be zero. a block write or re ad allows a transfer maximum of 32 data bytes. note: for the following smbus tables: figure 4.2 block write 4.3.2.2 block read a block read differs from a block write in that the repeated start condition exists to satisfy the smbus specification?s requirement for a ch ange in the transfer direction. denotes master-to-slave denotes slave-to-master s slave address register address wr a 17118 a 1 ... 1 81 byte count = n a data byte 1 a data byte 2 a 81 1 1 88 data byte n a p 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 23 revision 1.0 (06-04-13) datasheet figure 4.3 block read 4.3.2.3 invalid protocol response behavior note that any attempt to update registers with an invalid protocol will not be updated. the only valid protocols are write block and read block (described above), where the hub only responds to the 7-bit hardware selected slave address (0101100b). 4.3.3 slave device timeout devices in a transfer can abort the transfer in prog ress and release the bus when any single clock low interval exceeds 25 ms (t timeout, min ). the master must detect this condition and generate a stop condition within or after the tran sfer of the interrupted data byte. slave devices must reset their communication and be able to receive a new start condition no later than 35 ms (t timeout, max ). note: some simple devices do not contain a clock low drive circuit; this simple kind of device typically resets its communications port after a start or stop condition. the sl ave device timeout must be implemented. 4.3.4 stretching the sclk signal the hub supports stretching of the sclk by other devices on the smbus. however, the hub does not stretch the sclk . 4.3.5 smbus timing the smbus slave interface complies with the smbus specification revision 1.0 [2] . see section 2.1, ac specifications on page 3 for more information. 4.3.6 bus reset sequence the smbus slave interface resets and returns to the idle state upon a start condition followed immediately by a stop condition. 4.3.7 smbus alert response address the smbalert# signal is not supported by the hub. 1 s s slave address register address wr 1711 8 a 1 slave address rd a 711 ... a 81 1 1 88 1 81 p a a a a byte count = n data byte 2 data byte 1 data byte n 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 24 smsc USB2422 datasheet 4.4 smbus registers this section details the device smbus registers. note: internal default rom values are not visible to the smbus interface and cannot be read. when the hub is configured for smbus register load , the entire register set must be written. table 4.3 internal default and smbus register memory map reg. address type register name internal default rom smbus & eeprom default 00h r/w vendor id least significant bit register (vidl) 24h 00h 01h r/w vendor id most significant bit register (vidm) 04h 00h 02h r/w product id least signific ant bit register (pidl) 22h 00h 03h r/w product id most significant bit register (pidm) 24h 00h 04h r/w device id least signific ant bit register (didl) a0h 00h 05h r/w device id most signific ant bit register (didm) 00h 00h 06h r/w configuration data byte 1 register (cfg1) 8bh 00h 07h r/w configuration data byte 2 register (cfg2) 20h 00h 08h r/w configuration data byte 3 register (cfg3) 02h 00h 09h r/w non-removable device register (nrd) 00h 00h 0ah r/w port disable for self-powered operation register (pds) 00h 00h 0bh r/w port disable for bus-powered operation register (pdb) 00h 00h 0ch r/w max power for self-powered operation register (maxps) 01h 00h 0dh r/w max power for bus-powered operation register (maxpb) 32h 00h 0eh r/w hub controller max current for self-powered operation register (hcmcs) 01h 00h 0fh r/w hub controller max power for bus-powered operation register (hcmcb) 32h 00h 10h r/w power-on time register (pwrt) 32h 00h 11h r/w language id high register (langidh) 00h 00h 12h r/w language id low register (langidl) 00h 00h 13h r/w manufacturer string length register (mfrsl) 00h 00h 14h r/w product string length register (prdsl) 00h 00h 15h r/w serial string length register (sersl) 00h 00h 16h-53h r/w manufacturer string registers (manstr) 00h 00h 54h-91h r/w product string registers (prdstr) 00h 00h 92h-cfh r/w serial string registers (serstr) 00h 00h d0h r/w battery charging enable register (bc_en) 00h 00h e0h-f5h - reserved - - 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 25 revision 1.0 (06-04-13) datasheet 4.4.1 vendor id least signi ficant bit register (vidl) 4.4.2 vendor id most signi ficant bit regi ster (vidm) f6h r/w boost upstream register (boostup) 00h 00h f7h - reserved - - f8h r/w boost downstream register (boost40) 00h 00h f9h - reserved - - fah r/w port swap register (prtsp) 00h 00h fbh r/w port 1/2 remap register (prtr12) 00h 00h fch-feh - reserved - - ffh r/w status/command register (stcd) 00h 00h offset: 00h size: 8 bits bits description type default 7:0 least significant byte of the vendor id (vid_lsb) this is a 16-bit value that uniquely i dentifies the vendor of the user device (assigned by usb-interface forum). this field is set by the oem using the smbus interface option. r/w 00h address: 01h size: 8 bits bits description type default 7:0 most significant byte of the vendor id (vid_lsb) this is a 16-bit value that uniquely i dentifies the vendor of the user device (assigned by usb-interface forum). this field is set by the oem using the smbus interface options. r/w 00h table 4.3 internal default and smbus register memory map (continued) reg. address type register name internal default rom smbus & eeprom default 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 26 smsc USB2422 datasheet 4.4.3 product id least signi ficant bit register (pidl) 4.4.4 product id most sign ificant bit register (pidm) 4.4.5 device id least signif icant bit register (didl) 4.4.6 device id most signi ficant bit register (didm) address: 02h size: 8 bits bits description type default 7:0 least significant byte of the product id (pid_lsb) this is a 16-bit value that the vendor can assign that uniquely identifies this particular product (assigned by oem). th is field is set by the oem using the smbus interface options. r/w 00h address: 03h size: 8 bits bits description type default 7:0 most significant byte of the product id (pid_lsb) this is a 16-bit value that the vendor can assign that uniquely identifies this particular product (assigned by oem). this field is set by the oem using either smbus interface options. r/w 00h address: 04h size: 8 bits bits description type default 7:0 least significant byte of the device id (did_lsb) this is a 16-bit device release number in bcd format (assigned by oem). this field is set by the oem using either the smbus interface options. r/w 00h address: 05h size: 8 bits bits description type default 7:0 most significant byte of the device id (did_lsb) this is a 16-bit device release number in bcd format (assigned by oem). this field is set by the oem using the smbus interface options. r/w 00h 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 27 revision 1.0 (06-04-13) datasheet 4.4.7 configuration data byte 1 register (cfg1) address: 06h size: 8 bits bits description type default 7 self or bus power (self_bus_pwr) selects between self- and bus-powered operation. the hub is either self-powered (draws less than 2ma of upstream bus power) or bus-powered (limited to a 100ma maximum of upstream power prior to being configured by the host controller). when configured as a bus-powered device, the hub consumes less than 100ma of current prior to being confi gured. after configuration, the bus- powered hub (along with all associated hub circuitry, any embedded devices if part of a compound device , and 100ma per externally available downstream port) must consume no more than 500ma of upstream vbus current. the current consumption is system dependent, and the oem must ensure that the usb2.0 spec ifications are not violated. when configured as a self-powered device, <1ma of upstream vbus current is consumed and all ports are available, with each port being capable of sourcing 500ma of current. this field is set by the oem using the smbus interface option. please see the description under dynamic power for the self/bus power functionality when dynamic power switching is enabled. 0 = bus-powered operation 1 = self-powered operation note: if dynamic power switching is enabled, this bit is ignored and the local_pwr pin is used to determine if the hub is operating from self or bus power. r/w 0b 6 reserved -- 5 high speed disab le (hs_disable) disables the capability to attach as either a high/full- speed device, and forces attachment as full-speed only i.e. (no high-speed support). 0 = high-/full-speed 1 = full-speed-only (high-speed disabled) r/w 0b 4 multi-tt enable (mtt_enable) enables one transaction translator per port operation. selects between a mode where only one transaction translator is available for all ports (single-tt), or each port gets a dedicated transaction translator (multi-tt) note: the host may force single-tt mode only 0 = single tt for all ports. default to stt if mtt still exists 1 = one tt per port (multiple tt?s supported) r/w 0b 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 28 smsc USB2422 datasheet 3 eop disable (eop_disable) disables eop generation of eof1 when in full-speed mode. during fs operation only, this permits the hub to send eop if no downstream traffic is detected at eof1. see section 11.3.1 of the usb 2.0 specification for additional details. note: generation of an eop at the eof1 point may prevent a host controller (operating in fs mode) from placing the usb bus in suspend. 0 = an eop is generated at the eof1 point if no traffic is detected 1 = eop generation at eof1 is disabled (note: this is normal usb operation) note: this is a rarely used feature in the pc environment. it is included because it is a permitted featur e in chapter 11 of the usb specification. r/w 0b 2:1 over current sense (current_sns) selects current sensing on a port-by-port basis, all ports ganged, or none (only for bus-powered hubs) the ability to support current sensing on a port or ganged basis is hardware implementation dependent. 00 = ganged sensing (all ports together) 01 = individual port-by-port 1x = over current sensing not supported (must only be used with bus- powered configurations) r/w 00b 0 port power swit ching (port_pwr) enables power switching on all ports simultaneously (ganged), or port power is individually switched on and off on a port- by-port basis (individual). the ability to support power enabling on a port or ganged basis is hardware implementation dependent. 0 = ganged switching (all ports together) 1 = individual port-by-port switching r/w 0b bits description type default 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 29 revision 1.0 (06-04-13) datasheet 4.4.8 configuration data byte 2 register (cfg2) address: 07h size: 8 bits bits description type default 7 dynamic power enable (dynamic) controls the ability of the hub to au tomatically change from self-powered operation to bus- powered operation if the local power source is removed or is unavailable (and from bus-power ed to self-powered if the local power source is restored). note: if the local power source is available, the hub will always switch to self-powered operation. when dynamic power switching is enabled, the hub detects the availability of a local power source by monitoring the external local_pwr pin. if the hub detects a change in power source availability, the hub immediately disconnects and removes power from all downstream devices and disconnects the upstream port. the hub will then re-attach to the upstream port as either a bus-powered hub (if local-power is unavailable) or a self- powered hub (if local power is available). 0 = no dynamic auto-switching (pin becomes susp_ind) and the hub controller will utilize the inverse of the self_bus_pwr bit for 'hub_status_field' bit '0' (local power source) 1 = dynamic auto-switching capable (pin becomes local_pwr) and the hu b controller will utilize the local_pwr pin for 'hub_status_field' bit '0' (local power source) r/w 0b 6 reserved -- 5:4 over current timer delay (oc_timer) 00 = 0.1ms 01 = 4ms 10 = 8ms 11 = 16ms r/w 00b 3 compound device (compound) allows the oem to indicate that the hub is part of a compound (see the usb specification for definition) device. the applicable port(s) must also be defined as having a ?non-removable device?. note: when configured via strapping options, declaring a port as non- removable automatically causes the hub controlle r to report that it is part of a compound device. 0 = no 1 = yes, hub is part of a compound device r/w 0b 2:0 reserved -- 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 30 smsc USB2422 datasheet 4.4.9 configuration data byte 3 register (cfg3) 4.4.10 non-removable de vice register (nrd) address: 08h size: 8 bits bits description type default 7:4 reserved -- 3 port remapping en able (prtmap_en) selects the method used by the hub to assign port numbers and disable ports 0 = standard mode strap options or the following register s are used to define which ports are enabled, and the ports are mapped as port'n' on the hub is reported as port'n' to the host, unless one of the ports is disabled, then the higher numbered ports are remapped in order to report contiguous port numbers to the host. register 0ah: port disable for se lf powered operation (reset = 0x00) register 0bh: port disable for bu s powered operation (reset = 0x00). 1 = port re-map mode the mode enables remapping via register fbh: port remap 12 r/w 0b 2:1 reserved -- 0 string enable (string_en) enables string descriptor support. 0 = string support disabled 1 = string support enabled r/w 0b address: 09h size: 8 bits bits description type default 7:0 non-removable device (nr_device) indicates which port(s) include non- removable devices. 0 = port is removable 1 = port is non- removable informs the host if one of the active physical ports has a permanent device that is undetachable from the hub. note: the device must provide its own descriptor data. when using the internal default option, the non_rem[1:0] pins will designate the appropriate ports as being non- removable. bit 7= reserved bit 6= reserved bit 5= reserved bit 4= reserved bit 3= reserved bit 2= port 2 non-removable bit 1= port 1 non removable bit 0= reserved r/w 00h 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 31 revision 1.0 (06-04-13) datasheet 4.4.11 port disable for self-pow ered operation register (pds) 4.4.12 port disable for bus-powe red operation register (pdb) address: 0ah size: 8 bits bits description type default 7:0 port disable self-p owered (port_dis_sp) disables 1 or more ports. 0 = port is available 1 = port is disabled during self-powered operation, when prtmap_en = '0', this selects the ports which will be permanently disabled, and are not available to be enabled or enumerated by a host cont roller. the ports can be disabled in any order, the internal logic will automatic ally report the correct number of enabled ports to the usb host, and will reorder the active ports in order to ensure proper function. when using the internal default option, the prt_dis[1:0] pins will disable the appropriate ports. bit 7= reserved bit 6= reserved bit 5= reserved bit 4= reserved bit 3= reserved bit 2= port 2 disable bit 1= port 1 disable bit 0= reserved r/w 00h address: 0bh size: 8 bits bits description type default 7:0 port disable bus-powered (port_dis_bp) disables 1 or more ports. 0 = port is available 1 = port is disabled during bus-powered operation, when prtmap_en = '0', this selects the ports which will be permanently disabled, and are not available to be enabled or enumerated by a host cont roller. the ports can be disabled in any order, the internal logic will automatic ally report the correct number of enabled ports to the usb host, and will reorder the active ports in order to ensure proper function. when using the internal default option, the prt_dis[1:0] pins will disable the appropriate ports. bit 7= reserved bit 6= reserved bit 5= reserved bit 4= reserved bit 3= reserved bit 2= port 2 disable bit 1= port 1 disable bit 0= reserved r/w 00h 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 32 smsc USB2422 datasheet 4.4.13 max power for self-powered operation regi ster (maxps) 4.4.14 max power for bus-powere d operation regi ster (maxpb) 4.4.15 hub controller max current fo r self-powered op eration register (hcmcs) address: 0ch size: 8 bits bits description type default 7:0 max power self-powered (max_pwr_sp) value in 2ma increments that the h ub consumes from an upstream port (vbus) when operating as a self-powered hub. this value includes the hub silicon along with the combined powe r consumption (from vbus) of all associated circuitry on the board. this value also includes the power consumption of a permanently attached peripheral if the h ub is configured as a compound device, and the embedded peripheral reports 0ma in its descriptors. note: the usb2.0 specification does not permit this value to exceed 100ma. r/w 00h address: 0dh size: 8 bits bits description type default 7:0 max power bus-powered (max_pwr_bp) value in 2ma increments that the h ub consumes from an upstream port (vbus) when operating as a self-powered hub. this value includes the hub silicon along with the combined powe r consumption (from vbus) of all associated circuitry on the board. this value also includes the power consumption of a permanently attached peripheral if the h ub is configured as a compound device, and the embedded peripheral reports 0ma in its descriptors. r/w 00h address: 0eh size: 8 bits bits description type default 7:0 hub controller max current self-powered (hc_max_c_sp) value in 2ma increments that the h ub consumes from an upstream port (vbus) when operating as a self- powered hub. this value includes the hub silicon along with the combined powe r consumption (from vbus) of all associated circuitry on the board. th is value does not include the power consumption of a permanently attached peripheral if the h ub is configured as a compound device. note: the usb2.0 specification does not permit this value to exceed 100ma. r/w 00h 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 33 revision 1.0 (06-04-13) datasheet 4.4.16 hub controller m ax power for bus-powere d operation register (hcmcb) 4.4.17 power-on time register (pwrt) 4.4.18 language id hi gh register (langidh) 4.4.19 language id low register (langidl) address: 0fh size: 8 bits bits description type default 7:0 hub controller max power bus-powered (max_pwr_bp) value in 2ma increments that the h ub consumes from an upstream port (vbus) when operating as a bus- powered hub. this value will include the hub silicon along with the combined po wer consumption (from vbus) of all associated circuitry on the board. this value will not include the power consumption of a permanently attached peripheral if the h ub is configured as a compound device. r/w 00h address: 10h size: 8 bits bits description type default 7:0 power-on time (power_on_time) the length of time that is takes (in 2 ms intervals) from the time the host initiated power-on sequence begins on a port until power is good on that port. system software uses this value to determine how long to wait before accessing a powered-on port. r/w 00h address: 11h size: 8 bits bits description type default 7:0 usb language id high (lang_id_h) upper 8 bits of the 16-bit language id field. r/w 00h address: 12h size: 8 bits bits description type default 7:0 usb language id low (lang_id_l) lower 8 bits of the 16-bit language id field. r/w 00h 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 34 smsc USB2422 datasheet 4.4.20 manufacturer string length register (mfrsl) 4.4.21 product string leng th register (prdsl) 4.4.22 serial string le ngth register (sersl) 4.4.23 manufacturer stri ng registers (manstr) address: 13h size: 8 bits bits description type default 7:0 manufacturer string length (mfr_str_len) maximum string length is 31 characters. r/w 00h address: 14h size: 8 bits bits description type default 7:0 product string length (prd_str_len) maximum string length is 31 characters. r/w 00h address: 15h size: 8 bits bits description type default 7:0 serial string leng th (ser_str_len) maximum string length is 31 characters. r/w 00h address: 16h-53h size: 8 bits bits description type default 7:0 manufacturer st ring (mfr_str) unicode utf-16le per us b 2.0 specification. maximum string length is 31 characters (62 bytes). note: the string consists of individual 16 bit unicode utf-16le characters. the characters will be stored starting with the lsb at the least significant address and the msb at the next 8-bit location (subsequent characters must be stored in sequential contiguous address in the same lsb, msb manner). r/w 00h 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 35 revision 1.0 (06-04-13) datasheet 4.4.24 product string registers (prdstr) 4.4.25 serial string registers (serstr) 4.4.26 battery charging enable register (bc_en) address: 54h-91h size: 8 bits bits description type default 7:0 product string (prd_str) unicode utf-16le per us b 2.0 specification. maximum string length is 31 characters (62 bytes). note: the string consists of individual 16 bit unicode utf-16le characters. the characters will be stored starting with the lsb at the least significant address and the msb at the next 8-bit location (subsequent characters must be stored in sequential contiguous address in the same lsb, msb manner). r/w 00h address: 92h-cfh size: 8 bits bits description type default 7:0 serial string (ser_str) unicode utf-16le per us b 2.0 specification. maximum string length is 31 characters (62 bytes). note: the string consists of individual 16 bit unicode utf-16le characters. the characters will be stored starting with the lsb at the least significant address and the msb at the next 8-bit location (subsequent characters must be stored in sequential contiguous address in the same lsb, msb manner). r/w 00h address: d0h size: 8 bits bits description type default 7:0 battery charging enable (bc_en) enables the battery charging feature for the corresponding port. 0 = battery charging support is not enabled 1 = battery charging support is enabled bit 7= reserved bit 6= reserved bit 5= reserved bit 4= reserved bit 3= reserved bit 2= port 2 battery charging enable bit 1= port 1 battery charging enable bit 0= reserved r/w 00h 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 36 smsc USB2422 datasheet 4.4.27 boost upstream register (boostup) 4.4.28 boost downstream register (boost40) address: f6h size: 8 bits bits description type default 7:2 reserved -- 1:0 boost upstream (boost_iout_a) usb electrical signaling drive strengt h boost bit for upstream port 'a'. 00 = normal electrical drive strength 01 = elevated electrical drive strength (+4% boost) 10 = elevated electrical drive strength (+8% boost) 11 = elevated electrical drive strength (+12% boost) r/w 00b address: f8h size: 8 bits bits description type default 7:4 reserved -- 3:2 boost downstream port 2 (boost_iout_2) usb electrical signaling drive strengt h boost bit for upstream port '2'. 00 = normal electrical drive strength 01 = elevated electrical drive strength (+4% boost) 10 = elevated electrical drive strength (+8% boost) 11 = elevated electrical drive strength (+12% boost) r/w 00b 1:0 boost downstream port 1 (boost_iout_1) usb electrical signaling drive strengt h boost bit for upstream port '1'. 00 = normal electrical drive strength 01 = elevated electrical drive strength (+4% boost) 10 = elevated electrical drive strength (+8% boost) 11 = elevated electrical drive strength (+12% boost) r/w 00b 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 37 revision 1.0 (06-04-13) datasheet 4.4.29 port swap register (prtsp) address: fah size: 8 bits bits description type default 7:0 port swap (prtsp) swaps the upstream and downstream usb dp and dm pins for ease of board routing to devices and connectors. 0 = usb d+ functionality is assoc iated with the dp pin and d- functionality is associa ted with the dm pin. 1 = usb d+ functionality is associated with the dm pin and d- functionality is associa ted with the dp pin bit 7= reserved bit 6= reserved bit 5= reserved bit 4= reserved bit 3= reserved bit 2= port 2 dp/dm swap bit 1= port 1 dp/dm swap bit 0= upstream port dp/dm swap r/w 00h 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 38 smsc USB2422 datasheet 4.4.30 port 1/2 remap register (prtr12) address: fbh size: 8 bits bits description type default 7:0 port 1/2 remap (prtr12) when a hub is enumerated by a usb host controller, the hub is only permitted to report how many ports it has, the hub is not permitted to select a numerical range or assignment. the host controller will number the downstream ports of the hub starting wit h the number '1', up to the number of ports that the h ub reported as having. the host's port number is referred to as ?logical port number? and the physical port on the hub is the ?physical port number?. when remapping mode is enabled (prtmap_en in the configuration data byte 3 register (cfg3) ), the hub's downstream port numbers can be remapped to different logical port numbers assigned by the host. note: the oem must ensure that contig uous logical port numbers are used, starting from one up to the maximum number of enabled ports. this ensures that the hub's ports are numbered in accordance with the way a host will communicate with the ports. r/w 00h bits[7:4] = 0000 physical port 2 is disabled 0001 physical port 2 is mapped to logical port 1 0010 physical port 2 is mapped to logical port 2 0011 to 1111 reserved will default to 0000 value. bits[3:0] = 0000 physical port 1 is disabled 0001 physical port 1 is mapped to logical port 1 0010 physical port 1 is mapped to logical port 2 0011 to 1111 reserved will default to 0000 value. 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 39 revision 1.0 (06-04-13) datasheet 4.4.31 status/command register (stcd) address: ffh size: 8 bits bits description type default 7:3 reserved -- 2 smbus interface power down (intf_pw_dn) 0 = interface is active 1 = interface power down after ack has completed note: this bit is write once and is only cleared by assertion of the external reset_n pin. r/w 0b 1 reset (reset) resets the smbus interface and internal memory back to reset_n assertion default settings. 0 = normal run/idle state 1 = force a reset of the registers to their default state note: during this reset, this bit is automat ically cleared to its default value of 0. r/w 0b 0 usb attach and write protect (usb_attach) 0 = smbus slave interface is active 1 = hub will signal a usb attach event to an upstream device, and the internal memory that is not modify capable in the address range 00h- feh, is ?write-protect ed? to prevent unintentional data corruption. note: this bit is write once and is only cleared by assertion of the external reset_n pin. r/w 0b 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 40 smsc USB2422 datasheet chapter 5 dc parameters 5.1 maximum guaranteed ratings note 5.1 refer to jedec specification j-std-020d [3] . note 5.2 stresses above the specified parameters co uld cause permanent damage to the device. this is a stress rating only and functional operation of the device at any condition above those indicated in the operation sections of this specification is not implied. note 5.3 when powering this device from laboratory or system power supplies, it is important that the absolute maximum ratings not be exceeded or device failure can result. some power supplies exhibit voltage spikes on their outputs when the ac power is switched on or off. in addition, voltage transients on the ac power line may appear on the dc output. when this possibility exists, it is suggested that a clamp circuit be used. 5.2 operating conditions parameter symbol min max units comments storage temperature t stor -55 150 c lead temperature refer to jedec specification j-std-020d [3] 3.3 v supply voltage vdd33 4.6 v voltage on any i/o pin -0.5 5.5 v voltage on xtalin -0.5 4.0 v voltage on xtalout -0.5 2.5 v parameter symbol min max units comments USB2422 operating temperature t a 0 70 c ambient temperature in still air USB2422-i operating temperature t a -40 85 c ambient temperature in still air 3.3 v supply voltage vdd33 3.0 3.6 v 3.3 v supply rise time t rt33 0400 ssee figure 5.1 voltage on any i/o pin -0.3 5.5 v if any 3.3 v supply voltage drops below 3.0 v, then the max becomes: (3.3 v supply voltage) + 0.5 voltage on xtalin -0.3 vdd12 + 0.3 v 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 41 revision 1.0 (06-04-13) datasheet figure 5.1 supply rise time model table 5.1 dc electrical characteristics parameter symbol min typ max units comments i, is type input buffer low input level v ili 0.8 v ttl levels high input level v ihi 2.0 v input leakage i il -10 +10 av in = 0 to vdd33 hysteresis (is only) v hysi 250 350 mv input buffer with pull-up (ipu) low input level v ili 0.8 v ttl levels high input level v ihi 2.0 v low input leakage i ill +35 +90 av in = 0 high input leakage i ihl -10 +10 av in = vdd33 input buffer with pull-down (ipd) low input level v ili 0.8 v ttl levels high input level v ihi 2.0 v low input leakage i ill +10 -10 av in = 0 high input leakage i ihl -35 -90 av in = vdd33 iclk input buffer low input level v ilck 0.3 v high input level v ihck 0.9 v input leakage i il -10 +10 av in = 0 to vdd33 t 10% 10% 90% voltage t rt33 t 90% time 100% 3.3 v vss vdd33 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 42 smsc USB2422 datasheet note 5.4 output leakage is measured with the current pins in high impedance. note 5.5 see usb 2.0 specification [1] for usb dc electrical characteristics. note 5.6 1000 a for commercial temperature part, and 1200 a for industrial temperature part. note 5.7 800 a for commercial temperature part, and 1000 a for industrial temperature part. note 5.8 current measured during peak usb traffic and does not reflect the average current draw. o12, i/o12 & i/osd12 type buffer low output level v ol 0.4 v i ol = 12 ma @ vdd33 = 3.3 v high output level v oh 2.4 v i oh = -12 ma @ vdd33 = 3.3 v output leakage i ol -10 +10 a hysteresis (sd pad only) v hysc 250 350 mv v in = vdd33 ( note 5.1 ) supply current unconfigured hi-speed host i ccinths 40 45 ma supply current hi-speed host , each additional downstream port i ccintfs 35 40 ma note 5.8 supply current hi-speed host , 1 downstream port i hch1 47 58 ma note 5.8 supply current hi-speed host , 2 downstream ports i hch2 70 89 ma note 5.8 supply current full-speed host, 1 downstream port i fcc1 29 40 ma note 5.8 supply current full-speed host, 2 downstream ports i fcc2 35 45 ma note 5.8 supply current suspend i csby 425 note 5.6 a supply current reset i crst 300 note 5.7 a table 5.1 dc electrical ch aracteristics (continued) parameter symbol min typ max units comments 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 43 revision 1.0 (06-04-13) datasheet 5.2.1 pin capacitance table 5.2 pin capacitance limits parameter symbol min typ max unit test condition clock input capacitance c xtal 6 pf all pins except usb pins and the pins under the test tied to ac ground. input capacitance c in 6 pf capacitance t a = 25c fc = 1 mhz vdd33 = 3.3 v output capacitance c out 6 pf the maximum capacitance values include the full length of the pin pad. 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 44 smsc USB2422 datasheet chapter 6 ac specifications 6.1 oscillator/crystal parallel resonant, fundamental mode, 24 mhz 350 ppm. figure 6.1 typical crystal circuit table 6.1 crystal circuit legend figure 6.2 formula to find the value of c 1 and c 2 note 6.1 c 0 is usually included (subtracted by the crys tal manufacturer) in the specification for c l and should be set to 0 for use in the calculation of the capacitance formulas in figure 6.2, "formula to find the value of c1 and c2" . however, the pcb itself may present a parasitic capacitance between xtalin and xtalout . for an accurate calculation of c 1 and c 2, take the parasitic capacitance between traces xtalin and xtalout into account. note 6.2 each of these capacitance values is typically approximately 18 pf. symbol description in accordance with c 0 crystal shunt capacitance crystal manufacturer?s specification (see note 6.1 ) c l crystal load capacitance c b total board or trace capacitance oem board design c s stray capacitance smsc ic and oem board design c xtal xtal pin input capacitance smsc ic c 1 load capacitors installed on oem board calculated values based on figure 6.2, "formula to find the value of c1 and c2" (see note 6.2 ) c 2 c 1 c 2 c l crystal c 0 xtalin (c s1 = c b1 + c xtalin ) xtalout (c s2 = c b2 + c xtalout ) c 1 = 2 x (c l ? c 0 ) ? c s1 c 2 = 2 x (c l ? c 0 ) ? c s2 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 45 revision 1.0 (06-04-13) datasheet 6.2 external clock 50% duty cycle 10%, 24 mhz 350 ppm. the external clock is recomm ended to conform to the signaling level designated in the jesd76-2 specification on 1.2 v cmos logic. xtalout should be treated as a weak (< 1 ma) buffer output. 6.2.1 usb 2.0 the smsc hub conforms to all voltage, power, a nd timing characteristics and specifications as set forth in the usb 2.0 specification [1] . see the usb specification for more information. 6.3 smbus interface the smsc hub conforms to all voltage, power, a nd timing characteristics and specifications as set forth in the smbus 1.0 specification [2] for slave-only devices (except as noted in section 4.3, "smbus," on page 22 ). 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 46 smsc USB2422 datasheet chapter 7 package outline notes: 1. all dimensions are in mill imeters unless otherwise noted. 2. dimension ?b? applies to plated terminals and is m easured between 0.15 and 0.30 mm from the terminal tip. 3. the pin 1 identifier may vary, but is always located within the zone indicated. figure 7.1 24-sqfn package table 7.1 24-sqfn dimensions min nominal max remarks a 0.80 0.90 1.00 overa ll package height a1 0 0.02 0.05 standoff d/e 3.90 4.00 4.10 x/y body size d2/e2 2.40 2.50 2.60 x/y exposed pad size l 0.35 0.40 0.45 terminal length b 0.18 0.25 0.30 terminal width k 0.25 0.35 - pin to exposed pad clearance e 0.50 bsc terminal pitch 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 47 revision 1.0 (06-04-13) datasheet figure 7.2 recommended pcb land pattern figure 7.3 taping dimensions and part orientation 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 48 smsc USB2422 datasheet note: standard reel size is 4000 pieces per reel. figure 7.4 reel dimensions figure 7.5 tape length and part quantity 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 49 revision 1.0 (06-04-13) datasheet chapter 8 datasheet revision history table 8.1 customer revision history revision level & date secti on/figure/entry correction rev. 1.0 (06-04-13) initial revision 2-port usb 2.0 hi-speed hub controller datasheet revision 1.0 (06-04-13) 50 smsc USB2422 datasheet appendix a (acronyms) ocs: over-current sense pcb: printed circuit board phy: physical layer pll: phase-locked loop sqfn: sawn quad flat no leads rohs: restriction of hazardous substances directive scl: serial clock sie: serial interface engine smbus: system management bus tt: transaction translator 2-port usb 2.0 hi-speed hub controller datasheet smsc USB2422 51 revision 1.0 (06-04-13) datasheet appendix b (references) [1] universal serial bus specification, version 2. 0, april 27, 2000 (12/7/2000 and 5/28/2002 errata) usb implementers forum, inc. http://www.usb.org [2] system management bus specification, version 1.0 smbus. http://smbus.org/specs/ [3] jedec specifications: jesd76-2 (jun e 2001) and j-std-020d.1 (march 2008) jedec global standards for the microelectronics industry.http://www.jedec.org/standards-documents [4] usb battery charging specification, revision 1.1, april 15, 2009 usb implementers forum, inc. http://www.usb.org |
Price & Availability of USB2422
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |