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smsc gt3200, smsc usb3250 datasheet revision 1.3 (10-05-04) datasheet product features gt3200 (64-pin tqfp packages) usb3250 (56-pin qfn package) usb2.0 phy ic usb-if "hi-speed" certified to usb2.0 electrical specification interface compliant with the utmi specification (60mhz 8-bit unidirectional interface or 30mhz 16-bit bidirectional interface) supports 480mbps high speed (hs) and 12mbps full speed (fs) serial data transmission rates integrated 45 ? and 1.5k ? termination resistors reduce external component count internal short circuit protection of dp and dm lines on-chip oscillator operates with low cost 12mhz crystal robust and low power digital clock and data recovery circuit sync and eop generation on transmit packets and detection on receive packets nrzi encoding and decoding bit stuffing and unstuffing with error detection supports the usb suspend state, hs detection, hs chirp, reset and resume support for all test modes defined in the usb2.0 specification draws 72ma (185mw) maximum current consumption in hs mode - ideal for bus powered functions on-die decoupling capacitance and isolation for immunity to digital switching noise available in three 64-pin tqfp packages (gt3200) or a 56-pin qfn package (usb3250) full industrial operating temperature range from -40 o c to +85 o c (ambient)
order number(s): gt3200 - jd for 64 pin 10 x 10 x 1.4mm tqfp package gt3200 - jn for 64 pin 7 x 7 x 1.4mm tqfp package gt3200 - jv for 64 pin 7 x 7 x 1.4mm tqfp lead free package usb3250 - abzj for 56 pin 8 x 8 x 0.85mm qfn lead free package 80 arkay drive hauppauge, ny 11788 (631) 435-6000 fax (631) 273-3123 copyright ? smsc 2004. all rights reserved. circuit diagrams and other information relating to smsc products 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 bel ieved to be accurate, no responsibility is assumed for inaccuracies. smsc reserves the right to make changes to specifications and product descriptions a t any time without notice. contact your local smsc sales office to obtain the latest specifications before placing your product order. the provisi on of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual p roperty rights of smsc or others. all sales are expressly conditional on your agreement to the terms 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 product may contain design def ects 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 produc t 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 furthe r testing and/or modification will be fully at the risk of the customer. copies of this document or other smsc literature, as wel l as the terms of sale a greement, may be obtained by visiting smsc?s website at http://www.smsc.com. smsc is a registered trademark of standard microsy stems corporation (?smsc?). product names and company names are the trademarks of their respective holders. smsc disclaims and excludes any and all warranties, including without limitation any and all implied warranties of merchantability, fitness for a particular purpose, title, and against infringement and the like, and any and all warranties arising from any course of dealing or usage of trade. in no event shall smsc be liable for any direct, incidental, indirect, special, punitive, or consequential damages; or for lost data, profits, savings or revenues of any kind; regardless of the form of action, whether based on contract; tort; negligence of smsc or others; strict liability; breach of warranty; or otherwise; whether or not any remedy of buyer is held to have failed of its essential purpose, and whether or not smsc has been advised of the possibility of such damages. usb2.0 phy ic revision 1.3 (10-05-04) ii smsc gt3200, smsc usb3250 datasheet
usb2.0 phy ic smsc gt3200, smsc usb3250 iii revision 1.3 (10-05-04) datasheet table of contents chapter 1 general description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 chapter 2 functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 chapter 3 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 chapter 4 interface signal definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 chapter 5 limiting values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 chapter 6 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6.1 driver characteristics of full-speed drivers in high-speed capable transceivers . . . . . . . . . . . . 13 6.2 high-speed signaling eye patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 chapter 7 functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.1 modes of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.2 system clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 7.3 clock and data re covery circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 7.4 tx logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 7.5 rx logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 7.6 fs/hs rx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 7.7 fs/hs tx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 7.8 biasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 7.9 power control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 chapter 8 application notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 8.1 linestate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 8.2 opmodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 8.3 test mode support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 8.4 se0 handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 8.5 reset detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 8.6 suspend detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 8.7 hs detection handshake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 8.8 hs detection handshake - fs downstream facing port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 8.9 hs detection handshake - hs downstream facing port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 8.10 hs detection handshake - suspend timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 5 8.11 assertion of resume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 8.12 detection of resume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 8.13 hs device attach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 8.14 application diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 chapter 9 package outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
usb2.0 phy ic revision 1.3 (10-05-04) iv smsc gt3200, smsc usb3250 datasheet list of figures figure 2.1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 figure 3.1 64 pin gt3200 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 figure 3.2 56 pin usb3250 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 figure 6.1 full-speed driver voh/io h characteristics for high-speed ca pable transceiver . . . . . . . . 13 figure 6.2 full-speed driver vol/iol characteristics for high-speed capa ble transceiver. . . . . . . . . 14 figure 6.3 eye pattern measurement planes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 6.4 eye pattern for transmit waveform and eye patter n definition . . . . . . . . . . . . . . . . . . . . . . 16 figure 6.5 eye pattern for receive waveform and eye pattern definition . . . . . . . . . . . . . . . . . . . . . . . 17 figure 7.1 bidirectional 16-bit interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 figure 7.2 fs clk relationship to transm it data and control signals (8-bit mode) . . . . . . . . . . . . . . . 20 figure 7.3 fs clk relationship to rece ive data and control signals (8-bit mode) . . . . . . . . . . . . . . . 20 figure 7.4 transmit timing for a data packet (8-bit mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 7.5 transmit timing for 16-bit data, even byte count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 7.6 transmit timing for 16-bit data, odd byte count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 7.7 receive timing for data with un stuffed bits (8-bit mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 figure 7.8 receive timing for 16-bit data, even byte count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 figure 7.9 receive timing for 16-bit data, odd byte count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 figure 7.10 receive timing for data (with crc-16 in 8-bit mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 figure 7.11 receive timing for setup packet (8-bit mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 figure 7.12 receive timing for data packe t with crc-16 (8-bit mode). . . . . . . . . . . . . . . . . . . . . . . . . . 26 figure 8.1 reset timing behavior (hs mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 figure 8.2 suspend timing behavior (hs mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 figure 8.3 hs detection handshake timing behavior (fs mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 figure 8.4 chirp k-j-k-j-k-j sequence dete ction state diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 figure 8.5 hs detection handshake timing behavior (hs mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 figure 8.6 hs detection handshake timing behavior from susp end . . . . . . . . . . . . . . . . . . . . . . . . . . 36 figure 8.7 resume timing behavior (hs mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 figure 8.8 device attach behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 figure 8.9 application diagram for 64-pin tqfp package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 figure 8.10 application diagram for 56-pin qfn package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 figure 9.1 GT3200-JD 64 pin tqfp packag e outline, 10x10x1.4mm body . . . . . . . . . . . . . . . . . . . . . 42 figure 9.2 gt3200-jn, jv (lead free) 64 pin tqfp pack age outline, 7x7x1.4mm body . . . . . . . . . . . 44 figure 9.3 usb3250-abzj (lead free) 56 pin qfn packa ge outline, 8x8x0.85mm body . . . . . . . . . . 45
usb2.0 phy ic smsc gt3200, smsc usb3250 v revision 1.3 (10-05-04) datasheet list of tables table 4.1 system interface signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 table 4.2 data interface signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 table 4.3 usb i/o signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 4.4 biasing and clock oscillator signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 4.5 power and ground signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 5.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 table 5.2 recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 table 5.3 recommended external clock conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 table 6.1 electrical characteristics: supply pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 6.2 dc electrical characteristics: logic pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 6.3 dc electrical characteristics: analog i/o pins (dp/dm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 6.4 dynamic characteristics: analog i/o pins (dp/dm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 table 6.5 dynamic characteristics: digital utmi pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 table 6.6 eye pattern for transmit waveform and eye pattern de finition . . . . . . . . . . . . . . . . . . . . . . . 16 table 6.7 eye pattern for receive waveform and eye pattern de finition. . . . . . . . . . . . . . . . . . . . . . . . 17 table 8.1 linestate states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 table 8.2 operational modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 table 8.3 usb2.0 test mode to macrocell mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 table 8.4 reset timing values (hs mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 table 8.5 suspend timing values (hs mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 table 8.6 hs detection handshake timing values (fs mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 table 8.7 reset timing values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 table 8.8 hs detection handshake timing values from suspend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 table 8.9 resume timing values (hs mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 table 8.10 attach and reset timing values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 table 9.1 GT3200-JD 64 pin tqfp package parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 table 9.2 gt3200-jn, jv (lead free) 64 pin tqfp package parameters . . . . . . . . . . . . . . . . . . . . . . . 44 table 9.3 usb3250-abzj (lead free) 56 pin qfn package para meters. . . . . . . . . . . . . . . . . . . . . . . . 45
usb2.0 phy ic revision 1.3 (10-05-04) 1 smsc gt3200, smsc usb3250 datasheet chapter 1 general description the gt3200 and usb3250 provide the physical layer (phy) interface to a usb2.0 device controller. the ic is available in a 64 pin lead tqfp (gt3200) or a 56 pin qfn (usb3250). 1.1 applications the universal serial bus (usb) is the preferre d interface to connect high-speed pc peripherals. scanners printers external storage and system backup still and video cameras pdas cd-rw gaming devices 1.2 product description the gt3200 and usb3250 are usb2.0 physical layer transceiver (phy) integrated circuits. smsc's proprietary technology results in low power dissipation, which is ideal for building a bus powered usb2.0 peripheral. the phy can be configured for either an 8-bit unidirectional or a 16-bit bidirectional parallel interface, which complies with the usb transceiver macrocell interface (utmi) specification. it supports 480mbps transfer rate , while remaining backward compatible with usb 1.1 legacy protocol at 12mbps. all required termination for the usb2.0 transceiver is internal. internal 5.25v short circuit protection of dp and dm lines is provided for usb compliance. while transmitting data, the phy serializes data and generates sync and eop fields. it also performs needed bit stuffing and nrzi encoding. likewise, while receiving data, the phy de-serializes incoming data, stripping sync and eop fields and per forms bit un-stuffing and nrzi decoding.
usb2.0 phy ic smsc gt3200, smsc usb3250 2 revision 1.3 (10-05-04) datasheet chapter 2 functional block diagram note: see section 7.1, "modes of operation," on page 18 for a description of the digital interface. figure 2.1 block diagram v a l i d h pwr control fs se+ rx utmi interface tx state machine parallel to serial conversion bit stuff nrzi encode tx logic clock recovery unit clock and data recovery elasticity buffer vp vm biasing bandgap voltage reference current reference rbias vdd3.3 vdd1.8 pll and xtal osc system clocking fs rx fs se- hs rx hs sq rx state machine serial to parallel conversion bit unstuff nrzi decode rx logic dm tx 1.5k ? fs tx hs tx hs_data hs_cs_enable hs_drive_enable oeb vmo vpo rpu_en mux dp r x v a l i d rxactive r x e r r o r t x r e a d y reset suspendn xcvrselect termselect o p m o d e [ 1 : 0 ] linestate[1:0] clkout txvalid databus16_8 d a t a [ 1 5 : 0 ] * xi xo
usb2.0 phy ic revision 1.3 (10-05-04) 3 smsc gt3200, smsc usb3250 datasheet chapter 3 pinout figure 3.1 64 pin gt3200 pinout termselect linestate[1] linestate[0] 48 47 46 45 44 43 42 41 vss data[6] data[7] data[8] vss data[9] data[10] data[11] data[12] vss vss vss vss databus16_8 vdd1.8 rxerror txready rxactive clkout vss validh rxvalid txvalid data[0] vdd3.3 64 63 62 61 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 vssa nc dm dp vdda3.3 vssa rbias vdda3.3 vssa xi xo vdda1.8 nc suspendn vss nc vss vdd3.3 xcvrselect vss opmode[1] opmode[0] vdd1.8 vdd1.8 reset data[15] data[14] data[13] vdd3.3 21 22 23 24 25 26 27 28 29 30 31 32 34 35 36 37 38 39 40 vdd1.8 vss 33 60 59 58 57 56 55 54 53 52 51 50 49 data[5] data[2] data[3] data[4] data[1] usb2.0 gt3200 phy ic
usb2.0 phy ic smsc gt3200, smsc usb3250 4 revision 1.3 (10-05-04) datasheet figure 3.2 56 pin usb3250 pinout termselect linestate[1] linestate[0] vss data[6] data[7] data[8] data[9] data[10] data[11] data[12] vssa dm dp vdda3.3 vssa rbias vdda3.3 vssa xi xo vdda1.8 suspendn vss vdd3.3 xcvrselect opmode[1] opmode[0] vdd1.8 vdd1.8 reset data[15] data[14] data[13] vdd3.3 data[5] data[2] data[3] data[4] data[1] usb2.0 usb3250 phy ic 1 2 3 4 5 6 7 8 9 10 11 12 13 14 42 41 29 30 31 32 34 35 36 37 38 39 40 33 15 16 17 18 19 20 21 22 23 24 25 26 27 28 48 47 46 45 44 43 56 55 54 53 52 51 50 49 vdd1.8 vssa vss vss databus16_8 vdd1.8 rxerror txready rxactive clkout vss validh rxvalid txvalid data[0] vdd3.3
usb2.0 phy ic revision 1.3 (10-05-04) 5 smsc gt3200, smsc usb3250 datasheet chapter 4 interface signal definition table 4.1 system interface signals name direction active level description reset input high reset. reset all state machines. af ter coming out of reset, must wait 5 rising edges of clock before asserting txvalid for transmit. assertion of reset: may be asynchronous to clkout de-assertion of reset: mu st be synchronous to clkout xcvrselect input n/a transceiver select. this signal selects between the fs and hs transceivers: 0: hs transceiver enabled 1: fs transceiver enabled. termselect input n/a termination select. this signal selects between the fs and hs terminations: 0: hs termination enabled 1: fs termination enabled suspendn input low suspend. places the transceiver in a mode that draws minimal power from supplies. shuts down all blocks not necessary for suspend/resume operation. while suspended, termselect must always be in fs mode to ensure that the 1.5k ? pull-up on dp remains powered. 0: transceiver circuitry drawing suspend current 1: transceiver circuitry drawing normal current clkout output rising edge system clock. this output is used for clocking receive and transmit parallel data at 60mhz (8-bit mode) or 30mhz (16-bit mode). when in 8-bit mode, this specification refers to clkout as clk60. when in 16-bit mode, clkout is referred to as clk30. opmode[1:0] input n/a operational mode. these signals select between the various operational modes: [1] [0] description 0 0 0: normal operation 0 1 1: non-dr iving (all terminations removed) 1 0 2: disable bit stuffing and nrzi encoding 1 1 3: reserved linestate[1:0] output n/a line state. these signals reflect the current state of the usb data bus in fs mode, with [0] reflecting the state of dp and [1] reflecting the state of dm. when the device is suspended or resuming from a suspended state, the signals are combinatorial. otherwise, the signals are synchronized to clkout. [1] [0] description 0 0 0: se0 0 1 1: j state 1 0 2: k state 1 1 3: se1 databus16_8 input n/a databus select. selects between 8-bit and 16-bit data transfers. 0: 8-bit data path enabled. validh is undefined. clkout = 60mhz. 1: 16-bit data path enabled. clkout = 30mhz.
usb2.0 phy ic smsc gt3200, smsc usb3250 6 revision 1.3 (10-05-04) datasheet table 4.2 data interface signals name direction active level description data[15:0] bidir n/a data bus. 16-bit bidirectional mode. txvalid rxvalid validh data[15:0] 0 0 x not used 0 1 0 data[7:0] output is valid for receive 0 1 1 data[15:0] output is valid for receive 1 x 0 data[7:0] input is valid for transmit 1 x 1 data[15:0] input is valid for transmit data bus. 8-bit unidirectional mode. txvalid rxvalid data[15:0] 00not used 0 1 data[15:8] output is valid for receive 1 x data[7:0] input is valid for transmit txvalid input high transmit valid. indicates that the txdata bus is valid for transmit. the assertion of txvalid initiates the transmission of sync on the usb bus. the negation of txvalid initiates eop on the usb. control inputs (opmode[1:0], termselect,xcvrselect) must not be changed on the de-assert ion or assertion of txvalid. the phy must be in a quiescent state when these inputs are changed. txready output high transmit data ready. if txvalid is asserted, the sie must always have data available for clocking into the tx holding register on the rising edge of clkout. txready is an acknowledgement to the sie that the transceiver has clocked the data from the bus and is ready for th e next transfer on the bus. if txvalid is negated, txready can be ignored by the sie. validh bidir n/a transmit/receive high data bit valid (used in 16-bit mode only). when txvalid = 1, the 16 -bit data bus direction is changed to inputs. if validh is a sserted, data[15:0] is valid for transmission. if deasserted, only data[7:0] is valid for transmission. the data bu s is driven by the sie. when txvalid = 0 and rxvalid = 1, the 16-bit data bus direction is changed to outputs. if validh is asserted, the data[15:0] outputs are valid for receive. if deasseted, only data[7:0] is valid for receive. the data bus is read by the sie. rxvalid output high receive data valid. indicates that the rxdata bus has received valid data. the receive data holding register is full and ready to be unloaded. the sie is expected to latch the rxdata bus on the rising edge of clkout. rxactive output high receive active. indicates that the receive state machine has detected start of packet and is active. rxerror output high receive error. 0: indicates no error. 1: indicates a receive error has been detected. this output is clocked with the same timing as the rxdata lines and can occur at anytime during a transfer.
usb2.0 phy ic revision 1.3 (10-05-04) 7 smsc gt3200, smsc usb3250 datasheet note 4.1 a ferrite bead (with dc resistance <.5 ohms ) is recommended for filtering between both the vdd3.3 and vdda3.3 supplies and the vdd1.8 and vdda1.8 supplies. see figure 8.9 application diagram for 64-pin tqfp package on page 40 . note 4.2 56-pin qfn package will down-bond all vss and vssa to exposed pad under ic. exposed pad must be connected to solid gnd plane on printed circuit board. table 4.3 usb i/o signals name direction active level description dp i/o n/a usb positive data pin . dm i/o n/a usb negative data pin . table 4.4 biasing and clock oscillator signals name direction active level description rbias input n/a external 1% bias resistor . requires a 12k ? resistor to ground. used for setting hs transmit current level and on-chip termination impedance. xi/xo input n/a external crystal . 12mhz crystal connected from xi to xo. table 4.5 power and ground signals name direction active level description vdd3.3 n/a n/a 3.3v digital supply . powers digital pads. see note 4.1 vdd1.8 n/a n/a 1.8v digital supply . powers digital core. vss n/a n/a digital ground . see note 4.2 vdda3.3 n/a n/a 3.3v analog supply . powers analog i/o and 3.3v analog circuitry. vdda1.8 n/a n/a 1.8v analog supply . powers 1.8v analog circuitry. see note 4.1 vssa n/a n/a analog ground . see note 4.2
usb2.0 phy ic smsc gt3200, smsc usb3250 8 revision 1.3 (10-05-04) datasheet chapter 5 limiting values note: in accordance with the absolute maximum rating system (iec 60134 table 5.1 absolute maximum ratings parameter symbol conditions min typ max units 1.8v supply voltage (vdd1.8 and vdda1.8) v dd1.8 -0.5 tbd v 3.3v supply voltage (vdd3.3 and vdda3.3) v dd3.3 -0.5 4.6 v input voltage v i -0.5 4.6 v storage temperature t stg -40 +125 o c [1] equivalent to discharging a 100pf capacitor via a 1.5k ? resistor (hbm). table 5.2 recommended operating conditions parameter symbol conditions min typ max units 1.8v supply voltage (vdd1.8 and vdda1.8) v dd1.8 1.6 1.8 2.0 v 3.3v supply voltage (vdd3.3 and vdda3.3) v dd3.3 3.0 3.3 3.6 v input voltage on digital pins v i 0.0 v dd3.3 v input voltage on analog i/o pins (dp, dm) v i(i/o) 0.0 v dd3.3 v ambient temperature t a -40 +85 o c table 5.3 recommended external clock conditions parameter symbol conditions min typ max units system clock frequency xo driven by the external clock; and no connection at xi 12 (+/- 100ppm) mhz system clock duty cycle xo driven by the external clock; and no connection at xi 45 50 55 %
usb2.0 phy ic revision 1.3 (10-05-04) 9 smsc gt3200, smsc usb3250 datasheet chapter 6 electrical characteristics table 6.1 electrical ch aracteristics: supply pins parameter symbol conditions min typ max units fs transmit total power p tot(fstx) fs transmitting at 12mb/s; 50pf load on dp and dm 86 115 mw vdd3.3 power p 3.3v(fstx) 57 76 mw vdd1.8 power p 1.8v(fstx) 29 39 mw fs receive total power p tot(fsrx) fs receiving at 12mb/s 75 115 mw vdd3.3 power p 3.3v(fsrx) 46 76 mw vdd1.8 power p 1.8v(fsrx) 29 39 mw hs transmit total power p tot(hstx) hs transmitting into a 45 ? load 158 185 mw vdd3.3 power p 3.3v (hstx) 110 130 mw vdd1.8 power p 1.8v (hstx) 48 55 mw hs receive total power p tot(hsrx) hs receiving at 480mb/s 155 185 mw vdd3.3 power p 3.3v (hsrx) 107 130 mw vdd1.8 power p 1.8v (hsrx) 48 55 mw suspend mode 1 total current i dd(susp1) 15k ? pull-down and 1.5k ? pull-up resistor on pin dp not connected. 123 240 ua vdd3.3 current i 3.3v (susp1) 68 120 ua vdd1.8 current i 1.8v (susp1) 55 120 ua suspend mode 2 total current i dd(susp2 ) 15k ? pull-down and 1.5k ? pull-up resistor on pin dp connected. 323 460 ua vdd3.3 current i 3.3v (susp2) 268 340 ua vdd1.8 current i 1.8v (susp2) 55 120 ua (v dd1.8 =1.6 to 2.0v; v dd3.3 =3.0 to 3.6v; v ss = 0v; t a = -40 o c to +85 o c; unless otherwise specified.)
usb2.0 phy ic smsc gt3200, smsc usb3250 10 revision 1.3 (10-05-04) datasheet table 6.2 dc electrical characteristics: logic pins parameter symbol conditions min typ max units low-level input voltage v il v ss 0.8 v high-level input voltage v ih 2.0 v dd3.3 v low-level output voltage v ol i ol = 4ma 0.4 v high-level output voltage v oh i oh = -4ma v dd3.3 - 0.5 v input leakage current i li 1 ua pin capacitance c pin 4pf (v dd1.8 =1.6 to 2.0v; v dd3.3 =3.0 to 3.6v; v ss = 0v; t a = -40 o c to +85 o c; unless otherwise specified. pins data[15:0] and validh have passive pull-down elements.) table 6.3 dc electrical characte ristics: analog i/o pins (dp/dm) parameter symbol conditions min typ max units fs functionality input levels differential receiver input sensitivity v difs | v(dp) - v(dm) | 0.2 v differential receiver common-mode voltage v cmfs 0.8 2.5 v single-ended receiver low level input voltage v ilse 0.8 v single-ended receiver high level input voltage v ihse 2.0 v single-ended receiver hysteresis v hysse 0.050 0.150 v output levels low level output voltage v fsol pull-up resistor on dp; r l = 1.5k ? to v dd3.3 0.3 v high level output voltage v fsoh pull-down resistor on dp, dm; r l = 15k ? to gnd 2.8 3.6 v termination driver output impedance for hs and fs z hsdrv steady state drive (see figure 6.1 ) 40.5 45 49.5 ? input impedance z inp tx, rpu disabled 10 m ? pull-up resistor impedance z pu 1.425 1.575 k ? termination voltage for pull- up resistor on pin dp v term 3.0 3.6 v hs functionality input levels hs differential input sensitivity v dihs | v(dp) - v(dm) | 100 mv (v dd1.8 =1.6 to 2.0v; v dd3.3 =3.0 to 3.6v; v ss = 0v; t a = -40 o c to +85 o c; unless otherwise specified.)
usb2.0 phy ic revision 1.3 (10-05-04) 11 smsc gt3200, smsc usb3250 datasheet hs data signaling common mode voltage range v cmhs -50 500 mv hs squelch detection threshold (differential) v hssq squelch threshold 100 mv unsquelch threshold 150 mv output levels high speed low level output voltage (dp/dm referenced to gnd) v hsol 45 ? load -10 10 mv high speed high level output voltage (dp/dm referenced to gnd) v hsoh 45 ? load 360 440 mv high speed idle level output voltage (dp/dm referenced to gnd) v olhs 45 ? load -10 10 mv chirp-j output voltage (differential) v chirpj hs termination resistor disabled, pull-up resistor connected. 45 ? load. 700 1100 mv chirp-k output voltage (differential) v chirpk hs termination resistor disabled, pull-up resistor connected. 45 ? load. -900 -500 mv leakage current off-state leakage current i lz 1 ua port capacitance transceiver input capacitance c in pin to gnd 5 10 pf table 6.4 dynamic characteristics: analog i/o pins (dp/dm) parameter symbol conditions min typ max units fs output driver timing rise time t fsr cl = 50pf; 10 to 90% of |v oh - v ol | 420ns fall time t fff cl = 50pf; 10 to 90% of |v oh - v ol | 420ns output signal crossover voltage v crs excluding the first transition from idle state 1.3 2.0 v differential rise/fall time matching f rfm excluding the first transition from idle state 90 111.1 % (v dd1.8 =1.6 to 2.0v; v dd3.3 =3.0 to 3.6v; v ss = 0v; t a = -40 o c to +85 o c; unless otherwise specified.) table 6.3 dc electrical characteristics: analog i/o pins (dp/dm) (continued) parameter symbol conditions min typ max units (v dd1.8 =1.6 to 2.0v; v dd3.3 =3.0 to 3.6v; v ss = 0v; t a = -40 o c to +85 o c; unless otherwise specified.)
usb2.0 phy ic smsc gt3200, smsc usb3250 12 revision 1.3 (10-05-04) datasheet hs output driver timing differential rise time t hsr 500 ps differential fall time t hsf 500 ps driver waveform requirements eye pattern of template 1 in usb2.0 specification see figure 6.2 high speed mode timing receiver waveform requirements eye pattern of template 4 in usb2.0 specification see figure 6.2 data source jitter and receiver jitter tolerance eye pattern of template 4 in usb2.0 specification see figure 6.2 table 6.5 dynamic characte ristics: digital utmi pins parameter symbol conditions min typ max units utmi timing rxdata[7:0] t pd propagation delay from clkout to signal cl = 10pf 24ns rxvalid 24 rxactive 24 rxerror 24 linestate[1:0] 24 txready 24 txdata[7:0] t su setup time from signal to clkout 4ns txvalid 4 opmode[1:0] 4 xcvrselect 4 termselect 4 suspendn 4 txdata[7:0] t h hold time from clkout to signal 0ns txvalid 0 opmode[1:0] 0 xcvrselect 0 termselect 0 suspendn 0 (v dd1.8 =1.6 to 2.0v; v dd3.3 =3.0 to 3.6v; v ss = 0v; t a = -40 o c to +85 o c; unless otherwise specified.) table 6.4 dynamic characteristics: analog i/o pins (dp/dm) parameter symbol conditions min typ max units (v dd1.8 =1.6 to 2.0v; v dd3.3 =3.0 to 3.6v; v ss = 0v; t a = -40 o c to +85 o c; unless otherwise specified.)
usb2.0 phy ic revision 1.3 (10-05-04) 13 smsc gt3200, smsc usb3250 datasheet 6.1 driver characteristics of fu ll-speed drivers in high-speed capable transceivers the usb transceiver uses a differential output driver to drive the usb data signal onto the usb cable. figure 6.1 shows the v/i characteristics for a full-speed driver which is part of a high-speed capable transceiver. the normalized v/i curve for the driver must fall entirely inside the shaded region. the v/i region is bounded by the minimum driver im pedance above (40.5 ohm) and the maximum driver impedance below (49.5 ohm). the output voltage mu st be within 10mv of ground when no current is flowing in or out of the pin. figure 6.1 full-speed driver voh/ioh characte ristics for high-speed capable transceiver v out (volts) v oh 0 0 drive high 0.698*v oh test limit slope = 1/49.5 ohm slope = 1/40.5 ohm 0.566*v oh -10.71 * |v oh | -6.1 * |v oh | i out (ma)
usb2.0 phy ic smsc gt3200, smsc usb3250 14 revision 1.3 (10-05-04) datasheet 6.2 high-speed si gnaling eye patterns high-speed usb signals are characterized using eye patterns. for measuri ng the eye patterns 4 points have been defined (see figure 6.3 ). the universal serial bus specification rev.2.0 defines the eye patterns in several 'templates'. the two templates that are relevant to the phy are shown below. figure 6.2 full-speed driver vol/iol charac teristics for high-speed capable transceiver v out (volts) v oh 0 0 drive low i out (ma) 22 1.09v 0.434*v oh test limit slope = 1/40.5 ohm slope = 1/49.5 ohm 10.71 * |v oh |
usb2.0 phy ic revision 1.3 (10-05-04) 15 smsc gt3200, smsc usb3250 datasheet the eye pattern in figure 6.4 defines the transmit waveform requir ements for a hub (measured at tp2 of figure 6.3 ) or a device without a captiv e cable (measured at tp3 of figure 6.3 ). the corresponding signal levels and timings are given in ta b l e 6 . 6 . time is specified as a percentage of the unit interval (ui), which represents the nominal bit duration for a 480 mbit/s transmission rate. figure 6.3 eye pattern measurement planes usb transceiver device circuit board transceiver hub circuit board connector traces traces a connector b tp1 tp2 tp3 tp4
usb2.0 phy ic smsc gt3200, smsc usb3250 16 revision 1.3 (10-05-04) datasheet . the eye pattern in figure 6.5 defines the receiver sensitivity r equirements for a hub (signal applied at test point tp2 of figure 6.3 ) or a device without a captive cable (signal applied at test point tp3 of figure 6.3 ). the corresponding signal levels and timings are given in ta b l e 6 . 7 . timings are given as a percentage of the unit interval (ui), which r epresents the nominal bit duration for a 480 mbit/s transmission rate. figure 6.4 eye pattern for transmit waveform and eye pattern definition table 6.6 eye pattern for transmit waveform and eye pattern definition voltage level (d+, d-) time (% of unit interval) level 1 525mv in ui following a transition, 475mv in all others n/a level 2 -525mv in ui following a transition, -475mv in all others n/a point 1 0v 7.5% ui point 2 0v 92.5% ui point 3 300mv 37.5% ui point 4 300mv 62.5% ui point 5 -300mv 37.5% ui point 6 -300mv 62.5% ui differential 0 vlt differential -400mv differential 400mv unit interval 100% level 2 level 1 point 1 point 2 point 4 point 3 point 6 point 5 0%
usb2.0 phy ic revision 1.3 (10-05-04) 17 smsc gt3200, smsc usb3250 datasheet figure 6.5 eye pattern for receive waveform and eye pattern definition table 6.7 eye pattern for receive waveform and eye pattern definition voltage level (d+, d-) time (% of unit interval) level 1 575mv n/a level 2 -575mv n/a point 1 0v 15% ui point 2 0v 85% ui point 3 150mv 35% ui point 4 150mv 65% ui point 5 -150mv 35% ui point 6 -150mv 65% ui point 1 0% 100% point 2 level 2 level 1 point 3 point 4 point 5 point 6 differential -400mv differential 400mv differential 0 volt
usb2.0 phy ic smsc gt3200, smsc usb3250 18 revision 1.3 (10-05-04) datasheet chapter 7 functional overview figure 2.1 block diagram on page 2 shows the functional block diagram of the gt3200, smsc usb3250. each of the functions is described in detail below. 7.1 modes of operation the gt3200, smsc usb3250 support two modes of operation. see figure 7.1 for a block diagram of the digital interface. 8-bit unidirectional mode. selected when databus 16_8 = 0. clkout runs at 60mhz. the 8- bit transmit data bus uses the lower 8 bits of t he data bus (ie, txdata[7:0] = data[7:0]). the 8-bit receive data bus uses the upper 8 bits of the data bus (ie, rxdata[7:0] = data[15:8]). 16-bit bidirectional mode. selected when databus 16_8 = 1. clkout ru ns at 30mhz. an additional signal (validh) is used to identify wh ether the high byte of the respective 16-bit data word is valid. the full 16-bit data bus is used for transmit and receive operations. if txvalid is asserted, then the data[15:0] bus accepts transmit data from the sie. if txvalid is deasserted, then the data[15:0] bus presents received da ta to the sie. validh is undefined when databus16_8 = 0 (8-bit mode).
usb2.0 phy ic revision 1.3 (10-05-04) 19 smsc gt3200, smsc usb3250 datasheet 7.2 system clocking this block connects to either an external 12mhz crystal or an external clock source and generates a 480mhz multi-phase clock. the clock is used in the crc block to over-sample the incoming received data, resynchronize the transmit data, and is di vided down to a 30mhz or 60mhz version (clkout) which acts as the system byte clock. the pll block also outputs a clock valid signal to the other parts of the transceiver when the clock signal is stable. all utmi signals are synchronized to the clkout output. the behavior of the clkout is as follows: produce the first clkout transition no later th an 5.6ms after negation of suspendn. the clkout signal frequency error is less than 10% at this time. the clkout signal will fully meet the required accuracy of 500ppm no later than 1.4ms after the first transition of clkout. in hs mode there is one clkout cycle per byte time. the frequency of clkout does not change when the macrocell is switched between hs to fs modes. in fs mode (8-bit mode) there are 5 clk60 cycles per fs bit time, typically 40 clk60 cycles per fs byte time. if a received byte contains a stuffed figure 7.1 bidirectional 16-bit interface dataout[7:0 ] txvali d data[7:0] dataout[1 5 :8] data[15:8] rxvalid h valid h datain[7:0] datain[15:8] dataout[7:0 ] mu x selb a b txvalid h databus16_ 8 1=1 6 -bit mode, 0=8-bit mode txvalid transceiver core
usb2.0 phy ic smsc gt3200, smsc usb3250 20 revision 1.3 (10-05-04) datasheet bit then the byte boundary can be stretched to 45 clk60 cycles, and two stuffed bits would result in a 50 clk60 cycles. figure 7.2 shows the relationship between clk60 and the transmit data transfer signals in fs mode. txready is only asserted for one clk60 per byte ti me to signal the sie that the data on the txdata lines has been read by the macrocell. the sie may hold the data on the txdata lines for the duration of the byte time. transitions of txvalid must meet the defined setup and hold times relative to clk60. figure 7.3 shows the relationship between clk60 and the receive data control signals in fs mode. rxactive "frames" a packet, transitioning only at the beginning and end of a packet. however transitions of rxvalid may take place an y time 8 bits of data are available. figure 7.3 also shows how rxvalid is only asserted for one clkout cycle per byte time even though the data may be presented for the full byte time. the xcvrselect signal determines whether the hs or fs timing relationship is applied to the data and control signals. 7.3 clock and data recovery circuit this block consists of the clock and data recovery circuit and the elasticity buffer. the elasticity buffer is used to compensate for differences bet ween the transmitting and receiving clock domains. the usb2.0 specification defines a maximu m clock error of 1000ppm of drift. figure 7.2 fs clk relationship to transmit data and control signals (8-bit mode) figure 7.3 fs clk relationship to receive data and control signals (8-bit mode) clkout txdata[7:0] txvalid txready don't care data3 pid data4 data1 data2 data(n+1) data(n+2) clk60 rxactive rxdata[7:0] rxvalid data(n)
usb2.0 phy ic revision 1.3 (10-05-04) 21 smsc gt3200, smsc usb3250 datasheet 7.4 tx logic this block receives parallel data bytes placed on the data bus and performs the necessary transmit operations. these operations include parallel to serial conversion, bit stuffing and nrzi encoding. upon valid assertion of the proper tx control lines by the sie and tx stat e machine, the tx logic block will synchronously shift, at either the fs or hs rate, the data to the fs/hs tx block to be transmitted on the usb cable. data transmit timing is shown in figure 7.4 . figure 7.4 transmit timing for a data packet (8-bit mode) figure 7.5 transmit timing for 16-bit data, even byte count pid data sync data data data crc crc eop data data data crc crc data pid clk60 txvalid txdata[7:0] txready dp/dm clk30 data[7:0] txready txvalid dp/dm pid data sync data data data data crc crc pid data[15:8] data (0) data (1) data (2) data (3) data (4) crc (hi) 01234hi validh crc (lo) eop lo
usb2.0 phy ic smsc gt3200, smsc usb3250 22 revision 1.3 (10-05-04) datasheet the behavior of the transmit state machine is described below. asserting a reset forces the transmit state machine into the reset state which negates txready. when reset is negated the transm it state machine will enter a wait state. the sie asserts txvalid to begin a transmission. after the sie asserts txvalid it can assume that the transmission has started when it detects txready has been asserted. the sie must assume that t he phy has consumed a data byte if txready and txvalid are asserted on the rising edge of clkout. the sie must have valid packet information (pid) asserted on the txdata bus coincident with the assertion of txvalid. txready is sampled by the sie on the rising edge of clkout. the sie negates txvalid to complete a packet. once negated, the transmit logic will never reassert txready until after the eop has been generated. (txready will not re-assert until txvalid asserts again). the phy is ready to transmit another packet imme diately, however the sie must conform to the minimum inter-packet delays identified in the usb2.0 specification. 7.5 rx logic this block receives serial data from the crc blo ck and processes it to be transferred to the sie on the rxdata bus. the processing involved includes nrzi decoding, bit unstuffing, and serial to parallel conversion. upon valid a ssertion of the proper rx control lines by the rx state machine, the rx logic block will provide bytes to the rxdata bus as shown in the figures below. the behavior of the receive state machine is described below. figure 7.6 transmit timing for 16-bit data, odd byte count clk30 data[7:0] txready txvalid dp/dm pid data sync data data data data crc crc pid data[15:8] data (0) data (1) data (2) data (3) crc(hi) crc (lo) 01234hi validh eop lo
usb2.0 phy ic revision 1.3 (10-05-04) 23 smsc gt3200, smsc usb3250 datasheet figure 7.7 receive timing for data with unstuffed bits (8-bit mode) figure 7.8 receive timing for 16-bit data, even byte count data data data crc crc invalid data data data data invalid invalid clk60 rxactive rxdata[7:0] rxvalid clk30 data[7:0] rxactive rxvalid dp/dm pid data data data data data crc crc pid data[15:8] data (0) data (1) data (2) data (3) data (4) crc (lo) 01234lo validh crc (hi) eop hi sync
usb2.0 phy ic smsc gt3200, smsc usb3250 24 revision 1.3 (10-05-04) datasheet the assertion of reset will force the receive stat e machine into the reset state. the reset state deasserts rxactive and rxvalid. when the reset signal is deasserted the receive state machine enters the rx wait state and starts looking for a sync pattern on the usb. when a sync pattern is detected the state machine will enter th e strip sync state and assert rxactive. the length of the received hi-speed sync pattern varies and can be up to 32 bits long or as short as 12 bits long when at the end of five hubs. as a result, the state machine may remain in the strip sync state for several byte times before capturing the firs t byte of data and entering the rx data state. after valid serial data is received, the state machi ne enters the rx data state, where the data is loaded into the rx holding register on the rising edge of clkout and rxvalid is asserted. the sie must clock the data off the rxdata bus on the next ri sing edge of clkout. if opmode = normal, then stuffed bits are stripped from the data stream. each time 8 stuffed bits are accumulated the state machine will enter the rx data wait state, negating rxvalid thus skipping a byte time. when the eop is detected the state machine will enter the strip eop state and negate rxactive and rxvalid. after the eop has been stripped the receive state machine will reenter the rx wait state and begin looking for the next packet. the behavior of the receive state machine is described below: rxactive and rxready are sampled on the rising edge of clkout. in the rx wait state the receiver is always looking for sync. the usb3280 asserts rxactive when sync is detected (strip sync state). the usb3280 negates rxactive when an eop is de tected and the elasticity buffer is empty (strip eop state). when rxactive is asserted, rxvalid will be a sserted if the rx holding register is full. rxvalid will be negated if the rx holding regist er was not loaded during the previous byte time. this will occur if 8 stuffed bits have been accumulated. the sie must be ready to consume a data byte if rxactive and rxvalid are asserted (rx data state). figure 7.10 shows the timing relationship between the received data (dp/dm) , rxvalid, rxactive, rxerror and rxdata signals. note 7.1 the usb2.0 transceiver does not decode packet id's (pids). they are passed to the sie for decoding. figure 7.9 receive timing for 16-bit data, odd byte count pid data data data dat a crc crc eop pid data (0) data (1) data (2) data (3) crc (lo) crc (hi) 0123lohi sync clk30 data[7:0] rxactive rxvalid dp/dm data[15:8] validh
usb2.0 phy ic revision 1.3 (10-05-04) 25 smsc gt3200, smsc usb3250 datasheet note 7.2 figure 7.10 , figure 7.11 and figure 7.12 are timing examples of a hs/fs macrocell when it is in hs mode. when a hs/fs macroce ll is in fs mode (8-b it mode) there are approximately 40 clk60 cycles every byte ti me. the receive state machine assumes that the sie captures the data on the rxdata bus if rxactive and rxvalid are asserted. in fs mode, rxvalid will only be asserted for one clk60 per byte time. note 7.3 figure 7.10 , figure 7.11 and figure 7.12 the sync pattern on dp/dm is shown as one byte long. the sync pattern received by a device can vary in length. these figures assume that all but the last 12 bits have been consumed by the hubs between the device and the host controller. figure 7.10 receive timing for data (with crc-16 in 8-bit mode) figure 7.11 receive timing for setup packet (8-bit mode) clk60 rxactive rxdata[7:0] rxvalid rxerror dp/dm sync pid eop pid clk60 rxactive rxdata[7:0] rxvalid rxerror dp/dm crc-5 computation sync pid data data eop pid data data
usb2.0 phy ic smsc gt3200, smsc usb3250 26 revision 1.3 (10-05-04) datasheet 7.6 fs/hs rx the receivers connect directly to the usb cable. the block contains a separate differential receiver for hs and fs mode. depending on the mode, the se lected receiver provides the serial data stream through the mulitplexer to the rx logic block. the fs mode section of the fs/hs rx block also consists of a single-ended receiver on each of the data lines to determine the correct fs linestate. for hs mode support, the fs/hs rx block contains a squelch circuit to insure that noise is never interpreted as data. 7.7 fs/hs tx the transmitters connect directly to the usb cable. the block contains a separate differential fs and hs transmitter which receive encode d, bitstuffed, serialized data fr om the tx logic block and transmit it on the usb cable. the fs/hs tx block also cont ains circuitry that either enables or disables the pull-up resistor on the d+ line. 7.8 biasing this block consists of an internal bandgap referenc e circuit used for generating the driver current and the biasing of the analog circuits. this bloc k requires an external precision resistor (12k ? +/- 1% from the rbias pin to analog ground). 7.9 power control this is the block that receives and distributes all the power for the transceiver. this block is also responsible for handling esd protection. figure 7.12 receive timing for data packet with crc-16 (8-bit mode) sync eop pid data crc-16 computation crc crc clk60 rxactive rxdata[7:0] rxvalid rxerror dp/dm data data data pid data crc crc data data data
usb2.0 phy ic revision 1.3 (10-05-04) 27 smsc gt3200, smsc usb3250 datasheet chapter 8 application notes the following sections consist of select functional explanations to aid in implementing the phy into a system. for complete description and specificat ions consult the usb2.0 transceiver macrocell interface specification and universal se rial bus specification revision 2.0. 8.1 linestate the voltage thresholds that the li nestate[1:0] signals use to reflec t the state of dp and dm depend on the state of xcvrselect. linestate[1:0] us es hs thresholds when the hs transceiver is enabled (xcvrselect = 0) and fs thresholds when the fs transceiver is enabled (xcvrselect = 1). there is not a concept of variable single-e nded thresholds in the usb2.0 specification for hs mode. the hs receiver is used to detect chirp j or k, wher e the output of the hs receiver is always qualified with the squelch signal. if squelched, the output of the hs receiver is ignored. in the gt3200, smsc usb3250, as an alternative to using variable thre sholds for the single-ended receivers, the following approach is used. in hs mode, 3ms of no usb activity (idle state) signals a reset. the sie monitors linestate[1:0] for the idle state. to minimize transitions on linestate[1:0] while in hs mode, the presence of !squelch is used to force linestate[1:0] to a j state. table 8.1 linestate states state of dp/dm lines linestate[1:0] full speed xcvrselect =1 termselect=1 high speed xcvrselect =0 termselect=0 chirp mode xcvrselect =0 termselect=1 ls[1] ls[0] 0 0 se0 squelch squelch 0 1 j !squelch !squelch & hs differential receiver output 1 0 k invalid !squelch & !hs differential receiver output 1 1 se1 invalid invalid
usb2.0 phy ic smsc gt3200, smsc usb3250 28 revision 1.3 (10-05-04) datasheet 8.2 opmodes the opmode[1:0] pins allow control of the operating modes. the opmode[1:0] signals are normally changed on ly when the transmitter and the receiver are quiescent, i.e. when entering a test mo de or for a device initiated resume. when using opmode[1:0] = 10 (state 2), opmodes are set, and then 5 60mhz clocks later, txvalid is asserted. in this case, the sync and eop patterns are not transmitted. the only exception to this is when opmode[1:0] is set to state 2 while txvalid has been asserted (the transceiver is transmitting a packet), in order to flag a transmission error. in this case, the phy has already transmitted the sync pattern so upo n negation of txvalid the eop must also be transmitted to properly terminate the packet. changing the opmo de[1:0] signals under all other conditions, while the transceiver is transmitting or receiving data will generate undefined results. under no circumstances should the device controlle r change opmode while the dp/dm lines are still transmitting or unpredictable changes on dp/dm are likely to occur. the same applies for termselect and xcvrselect. 8.3 test mode support 8.4 se0 handling for fs operation, idle is a j state on the bus. se0 is used as part of the eop or to indicate reset. when asserted in an eop, se0 is never asserted for more than 2 bit times. the assertion of se0 for more than 2.5us is interpreted as a rese t by the device operating in fs mode. table 8.2 operational modes mode[1:0] state# state name description 00 0 normal operation transceiver operates with normal usb data encoding and decoding 01 1 non-driving allows the transceiver logic to support a soft disconnect feature which tri-states both the hs and fs transmitters, and removes any termination from the usb making it appear to an upstream port that the device has been disconnected from the bus 10 2 disable bit stuffing and nrzi encoding disables bitstuffing and nrzi encoding logic so that 1's loaded from the txdata bus become 'j's on the dp/dm and 0's become 'k's 11 3 reserved n/a table 8.3 usb2.0 test mode to macrocell mapping usb2.0 test modes gt3200, smsc usb3250 setup operational mode sie transmitted data xcvrselect & termselect se0_nak normal no transmit hs j disable all '1's hs k disable all '0's hs test_packet normal test packet data hs
usb2.0 phy ic revision 1.3 (10-05-04) 29 smsc gt3200, smsc usb3250 datasheet for hs operation, idle is a se0 state on the bus. se0 is also used to reset a hs device. a hs device cannot use the 2.5us asserti on of se0 (as defined for fs operation) to indicate reset since the bus is often in this state between packets. if no bus activity (idle) is detected for more than 3ms, a hs device must determine whether the downstream fa cing port is signaling a suspend or a reset. the following section details how this determination is made. if a reset is signaled, the hs device will then initiate the hs detection handshake protocol. 8.5 reset detection if a device in hs mode detects bus inactivity for more than 3ms (t1), it reverts to fs mode. this enables the fs pull-up on the dp line in an attempt to assert a continuous fs j state on the bus. the sie must then check linestate for the se0 condition. if se0 is asserted at time t2, then the upstream port is forcing the reset state to the devic e (i.e., a driven se0). the device will then initiate the hs detection handshake protocol. 8.6 suspend detection if a hs device detects se0 asserted on the bus for mo re than 3ms (t1), it reverts to fs mode. this enables the fs pull-up on the dp line in an attempt to assert a continuous fs j state on the bus. the figure 8.1 reset timing behavior (hs mode) table 8.4 reset timing values (hs mode) timing parameter description value hs reset t0 bus activity ceases, signaling either a reset or a suspend. 0 (reference) t1 earliest time at which the device may place itself in fs mode after bus activity stops. hs reset t0 + 3. 0ms < t1 < hs reset t0 + 3.125ms t2 sie samples linestate. if linestate = se0, then the se0 on the bus is due to a reset state. the device now enters the hs detection handshake protocol. t1 + 100s < t2 < t1 + 875s driven se0 hs detection handshake xcvrselect dp/dm termselect time last activity t2 t0 t1
usb2.0 phy ic smsc gt3200, smsc usb3250 30 revision 1.3 (10-05-04) datasheet sie must then check linestate for the j condition. if j is asserted at time t2, then the upstream port is asserting a soft se0 and the usb is in a j state indicating a suspend condition. by time t4 the device must be fully suspended. 8.7 hs detection handshake the high speed detection handshake process is en tered from one of three states: suspend, active fs or active hs. the downstream facing port a sserting an se0 state on the bus initiates the hs detection handshake. depending on the initial stat e, an se0 condition can be asserted from 0 to 4 ms before initiating the hs de tection handshake. these states are described in the usb2.0 specification. there are three ways in which a device may enter the hs handshake detection process: figure 8.2 suspend timing behavior (hs mode) table 8.5 suspend timing values (hs mode) timing parameter description value hs reset t0 end of last bus activity, signaling either a reset or a suspend. 0 (reference) t1 the time at which the device must place itself in fs mode after bus activity stops. hs reset t0 + 3. 0ms < t1 < hs reset t0 + 3.125ms t2 sie samples linestate. if linestate = 'j', then the initial se0 on the bus (t0 - t1) had been due to a suspend state and the sie remains in hs mode. t1 + 100 s < t2 < t1 + 875s t3 the earliest time where a device can issue resume signaling. hs reset t0 + 5ms t4 the latest time that a device must actually be suspended, drawing no more than the suspend current from the bus. hs reset t0 + 10ms last activity 'j' state soft se0 device is suspended suspendn xcvrselect dp/dm termselect time t2 t0 t1 t3 t4
usb2.0 phy ic revision 1.3 (10-05-04) 31 smsc gt3200, smsc usb3250 datasheet 1. if the device is suspended and it detects an se0 state on the bus it may immediately enter the hs handshake detection process. 2. if the device is in fs mode and an se0 state is detected for more than 2.5s. it may enter the hs handshake detection process. 3. if the device is in hs mode and an se0 state is detected for more than 3.0ms. it may enter the hs handshake detection process. in hs mode, a de vice must first determine whether the se0 state is signaling a suspend or a reset condition. to do this the device reverts to fs mode by placing xcvrselect and termselect into fs mode. the device must not wait more than 3.125ms before the reversion to fs mode. after reverti ng to fs mode, no less than 100s and no more than 875s later the sie must check the linestat e signals. if a j state is detected the device will enter a suspend state. if an se0 state is de tected, then the device wil l enter the hs handshake detection process. in each case, the assertion of the se0 state on t he bus initiates the reset. the minimum reset interval is 10ms. depending on the previous mode that the bus was in, the delay between the initial assertion of the se0 state and entering the hs ha ndshake detection can be from 0 to 4ms. this transceiver design pushes as much of the responsibility for timing events on to the sie as possible, and the sie requires a stable clkout signal to perform accurate timing. in case 2 and 3 above, clkout has been running and is stable, howev er in case 1 the phy is reset from a suspend state, and the internal oscillator and clocks of the transceiver are assumed to be powered down. a device has up to 6ms after the release of suspendn to assert a minimum of a 1ms chirp k. 8.8 hs detection handshake - fs downstream facing port upon entering the hs detection process (t0) xcvrselect and termselect are in fs mode. the dp pull-up is asserted and the hs terminations ar e disabled. the sie then sets opmode to disable bit stuffing and nrzi encoding, xcvrselect to hs mode, and begins the transmission of all 0's data, which asserts a hs k (chirp) on the bus (t1). the device chirp must last at least 1.0ms, and must end no later than 7.0ms after hs reset t0. at time t1 the device begins listening for a chirp sequence from the host port. if the downstream facing port is not hs capable, th en the hs k asserted by the device is ignored and the alternating sequence of hs chirp k's and j's is not generated. if no chir ps are detected (t4) by the device, it will enter fs mode by returning xcvrselect to fs mode.
usb2.0 phy ic smsc gt3200, smsc usb3250 32 revision 1.3 (10-05-04) datasheet note 8.1 t0 may occur to 4ms after hs reset t0. note 8.2 the sie must assert the ch irp k for 66000 clk60 cycles to ensure a 1ms minimum duration. figure 8.3 hs detection handshake timing behavior (fs mode) table 8.6 hs detection handshake timing values (fs mode) timing parameter description value t0 hs handshake begins. dp pull-up enabled, hs terminations disabled. 0 (reference) t1 device enables hs transceiver and asserts chirp k on the bus. t0 < t1 < hs reset t0 + 6.0ms t2 device removes chirp k from the bus. 1ms minimum width. t1 + 1.0 ms < t2 < hs reset t0 + 7.0ms t3 earliest time when downstream facing port may assert chirp kj sequence on the bus. t2 < t3 < t2+100s t4 chirp not detected by the device. device reverts to fs default state and waits for end of reset. t2 + 1.0ms < t4 < t2 + 2.5ms t5 earliest time at which host port may end reset hs reset t0 + 10ms no downstream facing port chirps se0 sof fs mode device chirp k txvalid termselect dp/dm xcvrselect opmode 1 opmode 0 time t1 t2 t0 t4 t5 t3
usb2.0 phy ic revision 1.3 (10-05-04) 33 smsc gt3200, smsc usb3250 datasheet 8.9 hs detection handshake - hs downstream facing port upon entering the hs detection process (t0) xcvrselect and termselect are in fs mode. the dp pull-up is asserted and the hs terminations ar e disabled. the sie then sets opmode to disable bit stuffing and nrzi encoding, xcvrselect to hs mode, and begins the transmission of all 0's data, which asserts a hs k (chirp) on the bus (t1). the device chirp must last at least 1.0ms, and must end no later than 7.0ms after hs reset t0. at time t1 the device begins listening for a chirp sequence from the downstream facing port. if the downs tream facing port is hs capable then it will begin generating an alternating sequence of chirp k' s and chirp j's (t3) after the termination of the chirp from the device (t2). after the device sees t he valid chirp sequence ch irp k-j-k-j-k-j (t6), it will enter hs mode by setting termselect to hs mode (t7). figure 8.4 provides a state diagram for chirp k-j-k-j-k-j validation. prior to the end of reset (t9) the device port must terminate the sequence of chirp k's and chirp j's (t8) and assert se0 (t8-t9). note that the sequence of chirp k's and chirp j's constitutes bus activity. the chirp k-j-k-j-k-j sequence occurs too slow to propagate through the serial data path, therefore linestate signal transitions must be used by th e sie to step through the chirp k-j-k-j-k-j state diagram, where "k state" is equivalent to line state = k state and "j state" is equivalent to linestate = j state. the sie must employ a count er (chirp count) to count the number of chirp k and chirp j states. note that linestate does not fi lter the bus signals so the requirement that a bus state must be "continuously asserted for 2.5s" must be verified by the sie sampling the linestate signals. figure 8.4 chirp k-j-k-j-k-j sequence detection state diagram detect k? start chirp k-j-k-j- k-j detection inc chirp count k state !k state detect j? inc chir p j state !j chirp count != 6 & !se0 chirp count = 0 chirp count != 6 & !se0 chirp valid chirp invalid se0 chirp count =6 6 66
usb2.0 phy ic smsc gt3200, smsc usb3250 34 revision 1.3 (10-05-04) datasheet figure 8.5 hs detection handshake timing behavior (hs mode) table 8.7 reset timing values timing parameter description value t0 hs handshake begins. dp pull-up enabled, hs terminations disabled. 0 (reference) t1 device asserts chirp k on the bu s. t0 < t1 < hs reset t0 + 6.0ms t2 device removes chirp k from the bus. 1 ms minimum width. t0 + 1.0ms < t2 < hs reset t0 + 7.0ms t3 downstream facing port asserts chirp k on the bus. t2 < t3 < t2+100s t4 downstream facing port toggles chirp k to chirp j on the bus. t3 + 40s < t4 < t3 + 60s t5 downstream facing port toggles chirp j to chirp k on the bus. t4 + 40s < t5 < t4 + 60s t6 device detects down stream port chirp. t6 t7 chirp detected by the device. device removes dp pull-up and asserts hs terminations, reverts to hs default state and waits for end of reset. t6 < t7 < t6 + 500s t8 terminate host port chirp k-j sequence (repeating t4 and t5) t9 - 500s < t8 < t9 - 100s t1 t2 txvalid downstream facing port chirps device chirp k termselect dp/dm kjk j k j k j device port chirp se0 sof xcvrselect hs mode opmode 1 opmode 0 time t0 t3 t4 t5 t6 t7 t8 t9
usb2.0 phy ic revision 1.3 (10-05-04) 35 smsc gt3200, smsc usb3250 datasheet note 8.3 t0 may be up to 4ms after hs reset t0. note 8.4 the sie must use linestate to detect the downstream port chirp sequence. note 8.5 due to the assertion of the hs terminatio n on the host port and fs termination on the device port, between t1 and t7 the signaling levels on the bus are higher than hs signaling levels and are less than fs signaling levels. 8.10 hs detection ha ndshake - suspend timing if reset is entered from a suspende d state, the internal oscillator and clocks of the transceiver are assumed to be powered down. figure 8.6 shows how clk60 is used to control the duration of the chirp generated by the device. when reset is entered from a suspended state (j to se0 transition reported by linestate), suspendn is combinatorially negated at time t0 by the sie. it takes approximately 5 milliseconds for the transceiver's oscillator to stabilize. the device does not gen erate any transitions of the clk60 signal until it is "usable" (where "usable" is defined as stable to within 10% of the nominal frequency and the duty cycle accuracy 505%). the first transition of clk60 occurs at t1. the si e then sets opmode to disable bit stuffing and nrzi encoding, xcvrselect to hs mode, and mu st assert a chirp k for 66000 clk60 cycles to ensure a 1ms minimum duration. if clk60 is 10% fa st (66mhz) then chirp k will be 1.0ms. if clk60 is 10% slow (54 mhz) then chirp k will be 1.2ms. the 5.6ms requirement for the first clk60 transition after suspendn, ensures enough time to assert a 1ms chirp k and still complete before t3. once the chirp k is completed (t3) the sie can begin looking for host chirps and use clk60 to time the process. at this time, the device follows the same protocol as in section 8.9 for completion of the high speed handshake. t9 the earliest time at which host port may end reset. the latest time, at which the device may remove the dp pull-up and assert the hs terminations, reverts to hs default state. hs reset t0 + 10ms table 8.7 reset timing values (continued) timing parameter description value
usb2.0 phy ic smsc gt3200, smsc usb3250 36 revision 1.3 (10-05-04) datasheet to detect the assertion of the dow nstream chirp k's and chirp j's for 2.5us {tfilt}, the sie must see the appropriate linestate signals asserted cont inuously for 165 clk60 cycles. figure 8.6 hs detection handshake timing behavior from suspend table 8.8 hs detection handshake timing values from suspend timing parameter description value t0 while in suspend state an se0 is detected on the usb. hs handshake begins. d+ pull-up enabled, hs terminations disabled, suspendn negated. 0 (hs reset t0) t1 first transition of clkout. clkout "usable" (frequency accurate to 10% , duty cycle accurate to 505). t0 < t1 < t0 + 5.6ms t2 device asserts chirp k on t he bus. t1 < t2 < t0 + 5.8ms t3 device removes chirp k from the bus. (1 ms minimum width) and begins looking for host chirps. t2 + 1.0 ms < t3 < t0 + 7.0 ms t4 clk "nominal" (clkout is frequency accurate to 500 ppm, duty cycle accurate to 505). t1 < t3 < t0 + 20.0ms clk60 look for host chirps device chirp k suspendn dp/dm termselect txvalid se0 j clk power up time xcvrselect opmode 1 opmode 0 time t0 t3 t4 t1 t2
usb2.0 phy ic revision 1.3 (10-05-04) 37 smsc gt3200, smsc usb3250 datasheet 8.11 assertion of resume in this case, an event internal to the device initiates the resume process. a device with remote wake- up capability must wait for at least 5ms after the bus is in the idle state before sending the remote wake-up resume signaling. this allows the hubs to get into their suspend state and prepare for propagating resume signaling. the device has 10ms where it can draw a non-suspend current before it must drive resume signaling. at the beginning of this period the sie may n egate suspendn, allowing the transceiver (and its oscillator) to power up and stabilize. figure 8.7 illustrates the behavior of a device returning to hs mode after being suspended. at t4, a device that was previously in fs mode would maintain termselect and xcvrselect high. to generate resume signaling (fs 'k') the device is placed in the "disable bit stuffing and nrzi encoding" operational mode (opmode [1:0] = 10), termselect and xcvrselect must be in fs mode, txvalid asserted, and all 0's data is presented on the txdata bus for at least 1ms (t1 - t2). figure 8.7 resume timing behavior (hs mode) table 8.9 resume timing values (hs mode) timing parameter description value t0 internal device event initiating the resume process 0 (reference) t1 device asserts fs 'k' on the bus to signal resume request to downstream port t0 < t1 < t0 + 10ms. t2 the device releases fs 'k' on the bus. however by this time the 'k' state is held by downstream port. t1 + 1.0ms < t2 < t1 + 15ms t3 downstream port asserts se0. t1 + 20ms t4 latest time at which a device, which was previously in hs mode, must restore hs mode after bus activity stops. t3 + 1.33s {2 low-speed bit times} txvalid t0 t3 t4 t1 t2 'k' state fs idle ('j') suspendn dp/dm xcvrselect & termselect se0 fs mode hs mode time
usb2.0 phy ic smsc gt3200, smsc usb3250 38 revision 1.3 (10-05-04) datasheet 8.12 detection of resume resume signaling always takes place in fs mode (termselect and xcvrselect = fs enabled), so the behavior for a hs device is identical to that if a fs device. the sie uses the linestate signals to determine when the usb transitio ns from the 'j' to the 'k' state and finally to the terminating fs eop (se0 for 1.25us-1.5s.). the resume signaling (fs 'k') will be asserted for at least 20ms. at the beginning of this period the sie may negate suspendn, allowing the transceiver (and its oscillator) to power up and stabilize. the fs eop condition is relatively short. sies that simply look for an se0 condition to exit suspend mode do not necessarily give the transceiver' s clock generator enough time to stabilize. it is recommended that all sie implementations key off t he 'j' to 'k' transition for exiting suspend mode (suspendn = 1). and within 1.25s after the transi tion to the se0 state (low-speed eop) the sie must enable normal operation, i.e. enter hs or fs mode depending on the mode the device was in when it was suspended. if the device was in fs mode: then the sie leaves the fs terminations enabled. after the se0 expires, the downstream port will assert a j state for one low-speed bit time, and the bus will enter a fs idle state (maintained by the fs terminations). if the device was in hs mode: then the sie must swit ch to the fs terminations before the se0 expires ( < 1.25s). after the se0 expires, the bus will then enter a hs idle state (maintained by the hs terminations). 8.13 hs device attach figure 8.8 demonstrates the timing of the phy control signals during a device attach event. when a hs device is attached to an upstream port, power is asserted to the device and the device sets xcvrselect and termselect to fs mode (time t1). v bus is the +5v power available on the usb cable. device reset in figure 8.8 indicates that vbus is within normal operational range as defined in the usb2.0 specification. the assertion of device reset (t0) by the upstream port will initialize the device. by monitoring linestate, the sie state machine knows to set the xcvrselect and termselect signals to fs mode (t1). the standard fs technique of using a pull-up resistor on dp to signal the attach of a fs device is employed. the sie must then ch eck the linestate signals for se0. if linestate = se0 is asserted at time t2 then the upstream port is forcing the re set state to the device (i .e. driven se0). the device will then reset itself before initiating the hs detection handshake protocol.
usb2.0 phy ic revision 1.3 (10-05-04) 39 smsc gt3200, smsc usb3250 datasheet figure 8.8 device attach behavior table 8.10 attach and reset timing values timing parameter description value t0 vbus valid. 0 (reference) t1 maximum time from vbus valid to when the device must signal attach. t0 + 100ms < t1 t2 (hs reset t0) debounce interval. the device now enters the hs detection handshake protocol. t1 + 100ms < t2 device reset idle (fs 'j') xcvrselect dp/dm termselect t2 se0 t0 time hs detection handshake v bus t1
usb2.0 phy ic smsc gt3200, smsc usb3250 40 revision 1.3 (10-05-04) datasheet 8.14 application diagrams figure 8.9 application diagram for 64-pin tqfp package utmi usb power txvalid txready rxactive rxvalid rxerror validh databus16_8 xcvrselect termselect suspendn reset opmode 0 opmode 1 linestate 0 linestate 1 clkout data 0 data 1 data 2 data 3 data 4 data 5 data 6 data 7 data 8 data 9 data 10 data 11 data 12 data 13 data 14 data 15 xi xo dp dm vdda1.8 vdd1.8 vdd1.8 vdd1.8 vdd1.8 vdda3.3 vdda3.3 vdd3.3 vdd3.3 vdd3.3 vss vss vss vss vss vss vss vss vss vss vss vssa vssa vssa usb-b gnd vdd3.3 1? 12mhz crystal c load c load 50 47 46 45 44 42 41 40 39 37 36 35 34 31 30 29 11 12 13 19 27 43 59 6 9 18 32 49 51 57 56 52 58 53 60 20 21 15 28 24 23 26 25 55 5 4 16 17 22 33 38 48 54 61 62 63 64 2 7 10 rbias 8 12k ? vdd1.8 voltage regulator vdd3.3 10uf 1uf 1uf 10uf vdd1.8 ferrite bead ferrite bead 10uf
usb2.0 phy ic revision 1.3 (10-05-04) 41 smsc gt3200, smsc usb3250 datasheet figure 8.10 application diagram for 56-pin qfn package utmi usb power txvalid txready rxactive rxvalid rxerror validh databus16_8 xcvrselect termselect suspendn reset opmode 0 opmode 1 linestate 0 linestate 1 clkout data 0 data 1 data 2 data 3 data 4 data 5 data 6 data 7 data 8 data 9 data 10 data 11 data 12 data 13 data 14 data 15 xi xo dp dm vdda1.8 vdd1.8 vdd1.8 vdd1.8 vdd1.8 vdda3.3 vdda3.3 vdd3.3 vdd3.3 vdd3.3 vss vss vss vss vss vssa vssa vssa vssa usb-b gnd vdd3.3 1? 12mhz crystal c load c load 44 42 41 40 39 37 36 35 34 32 31 30 29 27 26 25 10 11 12 16 23 38 53 4 7 15 28 43 45 51 50 46 52 47 54 17 18 13 24 20 19 22 21 49 3 2 14 33 48 55 56 1 5 8 9 rbias 6 12k ? vdd1.8 voltage regulator vdd3.3 10uf 1uf 1uf 10uf vdd1.8 ferrite bead ferrite bead 10uf
usb2.0 phy ic smsc gt3200, smsc usb3250 42 revision 1.3 (10-05-04) datasheet chapter 9 package outlines the phy is offered in four package types: GT3200-JD (10x10x1.4mm tqfp), gt3200-jn (7x7x1.4mm tqfp), gt3200-jv (7x7x1.4mm tqfp lead free), gt3200-abzj (8x8x0.85mm qfn lead free) figure 9.1 GT3200-JD 64 pin tqfp package outline, 10x10x1.4mm body table 9.1 GT3200-JD 64 pin tqfp package parameters min nominal max remarks a ~ ~ 1.60 overall package height a1 0.05 ~ 0.15 standoff a2 1.35 ~ 1.45 body thickness d 11.80 ~ 12.2 x span d1 9.80 ~ 10.2 x body size e 11.80 ~ 12.20 y span e1 9.80 ~ 10.20 y body size h 0.09 ~ 0.20 lead frame thickness l 0.45 0.60 0.75 lead foot length l1 ~ 1.00 ~ lead length e 0.50 basic lead pitch 0 o ~7 o lead foot angle w 0.17 0.22 0.27 lead width r1 0.08 ~ ~ lead shoulder radius r2 0.08 ~ 0.20 lead foot radius ccc ~ ~ 0.08 coplanarity
usb2.0 phy ic revision 1.3 (10-05-04) 43 smsc gt3200, smsc usb3250 datasheet notes: 1 controlling unit: millimeter. 2 tolerance on the true position of the leads is 0.04 mm maximum. 3 package body dimensions d1 and e1 do not include the mold protrusion. maximum mold protrusion is 0.25 mm per side. 4 dimension for foot length l measured at the gauge plane 0.25 mm above the seating plane. 5 details of pin 1 identifier are optional but must be located within the zone indicated.
usb2.0 phy ic smsc gt3200, smsc usb3250 44 revision 1.3 (10-05-04) datasheet notes: 1 controlling unit: millimeter. 2 tolerance on the true position of the leads is 0.035 mm maximum. figure 9.2 gt3200-jn, jv (lead free) 64 pi n tqfp package outline, 7x7x1.4mm body table 9.2 gt3200-jn, jv (lead free) 64 pin tqfp package parameters min nominal max remarks a ~ ~ 1.60 overall package height a1 0.05 ~ 0.15 standoff a2 1.35 1.40 1.45 body thickness d 8.80 9.00 9.20 x span d1 6.80 7.00 7.20 x body size e 8.80 9.00 9.20 y span e1 6.80 7.00 7.20 y body size h 0.09 ~ 0.20 lead frame thickness l 0.45 0.60 0.75 lead foot length l1 ~ 1.00 ref. ~ lead length e 0.40 basic lead pitch 0 o ~7 o lead foot angle w 0.13 0.18 0.23 lead width ccc ~ ~ 0.08 coplanarity
usb2.0 phy ic revision 1.3 (10-05-04) 45 smsc gt3200, smsc usb3250 datasheet 3 package body dimensions d1 and e1 do not include the mold protrusion. maximum mold protrusion is 0.25 mm per side. 4 dimension for foot length l measured at the gauge plane 0.25 mm above the seating plane. 5 details of pin 1 identifier are optional but must be located within the zone indicated. figure 9.3 usb3250-abzj (lead free) 56 pin qfn package outline, 8x8x0.85mm body table 9.3 usb3250-abzj (lead free) 56 pin qfn package parameters min nominal max remarks a 0.70 ~ 1.00 overall package height a1 0 0.02 0.05 standoff a2 ~ ~ 0.80 mold thickness d 7.85 8.00 8.15 x overall size d1 7.55 ~ 7.95 x mold cap size d2 2.25 ~ 6.80 x exposed pad size e 7.85 8.00 8.15 y overall size e1 7.55 ~ 7.95 y mold cap size e2 2.25 ~ 6.80 y exposed pad size l 0.30 ~ 0.50 terminal length
usb2.0 phy ic smsc gt3200, smsc usb3250 46 revision 1.3 (10-05-04) datasheet notes: 1 controlling unit: millimeter. 2 dimension b applies to plated terminals and is measured between 0.15mm and 0.30mm from the terminal tip. tolerance on the true position of th e terminal is 0.05 mm at maximum material conditions (mmc). 3 details of terminal #1 identifier are optional but must be located wit hin the zone indicated. 4 coplanarity zone applies to exposed pad and terminals. e 0.50 basic terminal pitch b 0.18 ~ 0.30 terminal width ccc ~ ~ 0.08 coplanarity table 9.3 usb3250-abzj (lead free) 56 pin qfn package parameters (continued) min nominal max remarks

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