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t echnical b rief o k i n e t w o r k p r o d u c t s august 1997 W722 usb hub/compound device controller 0.5 m m technology megamacro function
n n oki semiconductor contents description................................................................................................................................................................ 1 features ..................................................................................................................................................................... 1 signal descriptions .................................................................................................................................................. 5 functional description ............................................................................................................................................ 8 serial interface engine ...................................................................................................................................... 8 core controller .................................................................................................................................................. 8 repeater .............................................................................................................................................................. 8 port state machine ............................................................................................................................................. 8 descriptors .......................................................................................................................................................... 8 fifo control ...................................................................................................................................................... 9 usb interface ...................................................................................................................................................... 9 glossary ................................................................................................................................................................... 10 appendix ................................................................................................................................................................. 11
1 oki semiconductor W722 usb hub/compound device controller 0.5 m m technology megamacro function description oki? W722 universal serial bus (usb) hub/compound device controller megamacro function is a featured element in oki? 0.5 m m sea of gates (sog) and customer structured array (csa) families. the W722 provides oki? serial interface engine (sie), a hub core controller (hcc), a hub repeater (hr), and a status/descriptor/register file block in four highly integrated submodules. the submodule partitioning allows custom configurations to be easily developed. oki also offers optional usb fifo con- troller and application interface logic modules to form a usb compound device function. features 1. the hub controller has 15k gates, with an additional 12k gates for the optional embedded function, fifo control, and application interface logic. 2. pin count is based on three downstream ports and one embedded function. supported asic families family name family type msm13r0000 sea of gates msm98r000 customer structured array recommended operating conditions (v ss = 0 v) parameter symbol min. typical max. unit power supply voltage v dd 2.7 3.3 3.6 v operating temperature t j -40 +25 +85 c megamacro function characteristics megamacro function description logic gate count logic pin count W722 usb hub/compound device controller 15k [1] 154 [2] usb v1.0 compliant. supports up to four downstream ports (expandable). can replace external downstream ports with internal ports to interface with embedded functions. supports any combination of low-speed (1.5 mbps) and full-speed (12 mbps) downstream ports. hub function supports one control endpoint and one interrupt endpoint. embedded function supports 1 control end point and 6 additional endpoint addresses, expandable up to 32 endpoint addresses. auto-sensing capability for power sources can behave as either a self-powered or bus-powered hub. individual port power switching capability for bus-powered hubs. individual port over-current protection mechanism and individual port over-current indicator for self-powered hubs. supports remote-wakeup feature initiated by the hub itself, the embedded function, or the downstream devices. built-in (dynamic phase-locked loop (dpll); interface for optional external dpll.
n W722 usb hub/compound device controller n 2 oki semiconductor figure 1. W722 logic symbol figure 2. W722 block diagram usb_dpin usb_dmin usb_rxd usb_dpout usb_dmout usb_txenb full_spden sel_ext_pll sys_clock [7:0]ma [7:0]md mrdyb [7:0]pd [3:0]pkt_rdy setup_rdy [7:0]trx_out_data [7:0]rcv_out_data [7:0]trx_in_data [2:0]trx_sel [8:0]trx_wr_ptr [6:0]trx_wrb [7:0]rcv_in_data [2:0]rcv_sel [6:0]rcv_wrb embedded function fifo interface usb interface embedded function application interface W722 sys_reset testmode mwr_rdb iso_err usb_reset validsof [8:0]trx_rd_ptr [8:0]rcv_wr_ptr [8:0]rcv_rd_ptr osc_clk usb_clk_ext usb_rxd_out dpll interface (optional) optional hardware control or customers m _controller interface hub_core controller (hcc) oki serial interface engine (sie) hub repeater (hr) descriptors/status/ register file to usb transceiver to usb trnasceivers
n W722 usb hub/compound device controller n 3 oki semiconductor figure 3. W722 block diagram with optional modules figure 4. a usb hub megamacro function application (standalone hub) example customers m _controller interface hub_core controller (hcc) oki serial interface engine (sie) hub repeater (hr) descriptors/ status/ register file to usb transceiver to usb trnasceivers optional fifo controller optional application interface to fifos (datapath) to fifos (datapath) to fifos (datapath) to application module to application module customers m _controller interface hub_core controller (hcc) oki serial interface engine (sie) hub repeater (hr) descriptors/status/ register file upstream port usb transceiver usb transceiver usb transceiver usb transceiver usb transceiver usb transceiver downstream ports to customers m _controller W722 magamacro usb cables usb cable
n W722 usb hub/compound device controller n 4 oki semiconductor figure 5. a usb hub megamacro function application (compound device) example customers m _controller interface hub_core controller (hcc) oki serial interface engine hub repeater descriptors/ status/ register file optional fifo optional usb cables usb transceiver usb transceiver usb transceiver external downstream ports usb transceiver upstream port usb cable W722 magamacro function fifos data path data path controls internal downstream application module external module i/o
n W722 usb hub/compound device controller n 5 oki semiconductor signal descriptions 1. n = number of downstream ports. {usb_dpin[0], usb_dmin[0], usb_dpout[0], usb_dmout[0], usb_rxd[0], usb_texnb[0]}: usb upstream port interface {usb_dpin[i], usb_dmin[i], usb_dpout[i], usb_dmout[i], usb_rxd[i], usb_txenb[i]}, for i from 1 to n, is the usb downstream port interface for port i. usb interface signal type assertion description [n:0] [1] usb_dpin input usb data plus in. this input and the [n:0]usb_dmin input are the received single-ended data from the usb transceiver. the table below shows values and results for these signals. [n:0]usb_dmin input usb data minus in. this input and the [n:0]usb_dpin input are the received single ended data from the usb transceiver. see the table above for the description, values, and results of the usb_dpin signals. [n:0]usb_dpout output usb data plus out . this output and the [n:0]usb_dmout signal come from the usb trans- mit engine and drive the differential output buffers. the table below shows values and re- sults for these signals. [n:0]usb_dmout output usb data minus out. this output and the [n:0]usb_dpout signal come from the usb transmit engine and drive the differential output buffers. see the table above for the de- scription, values, and results of the usb_dpout signals. [n:0]usb_rxd input usb differential received data. this input comes from the usb differential receiver, and connects to the W722 megamacro function. [n:0]usb_txenb output low usb 3-state output enable. this signal connects to the transceiver eb input through an inverter gate. when the W722 megamacro function asserts this signal low, the transceiv- er transmits data on the usb bus. see appendix for the usb transceiver data sheets. usb_dpin usb_dmin result 0 0 se0 0 1 logic ? 1 0 logic ? 1 1 undefined usb_dpout usb_dmout result 0 0 se0 0 1 logic ? 1 0 logic ? 1 1 undefined
n W722 usb hub/compound device controller n 6 oki semiconductor application interface signal type assertion description sys_clock input clock . attach a 12-mhz clock signal to this input for full-speed operation and 1.5-mhz clock signal for low-speed operation. sys_reset input high W722 reset. asserting this signal high resets the W722 megamacro function. the ap- plication module is required to assert this signal at power-on. mwr_rdb input write/read select. when external application logic asserts this signal high, the applica- tion is in write mode. when asserted low, the application is in read mode. external application logic asserts this signal high when writing data to the transmit fifos or to the register files. external application logic asserts this signal low when reading data from the receiving fifos or from the register files. the register files contain information describ- ing the function and transaction status. usb_reset output high usb reset . this is the reset signal from the usb device controller. [7:0]ma input address bus. these eight inputs receive the address of the register files in the usb device controller. [7:0]md input input data bus. these eight inputs receive the data to be stored in the register files or transmit fifos. mrdyb input low data strobe. when asserted low and in write mode, the data on the [7:0]md signal lines are valid for writing. when asserted low and in read mode, the data on the [7:0]pd signals are valid for reading. [7:0]pd output output data bus . these eight outputs transmit data received from either the register files or the receive fifos. [3:0]pkt_rdy output high packet ready . when the W722 asserts this signal, it indicates that one of the four receive fifos contains valid data. the application reads the data through the [7:0]pd bus. full_spden input usb full speed enable. the application module sets this pin to ??to select full-speed operation and ??to select low-speed operation. setup_rdy output high setup ready. asserting this signal high indicates an 8-byte setup data sequence has been received from the usb bus. iso_err output high isochronous error. used for loopback testing or to indicate isochronous data has been re- ceived with data1 pid. validsof output high valid sof . this signal is asserted for two bit times, asynchronous to sys_clock, and indi- cates a valid sof token is received when asserted high. sel_ext_pll input high select external pll . asserting this signal high selects the external pll option. testmode input high testmode . asserting this signal invokes a loopback test mode.
n W722 usb hub/compound device controller n 7 oki semiconductor fifo interface signal type assertion description [7:0]trx_out_data input transmit fifo(s} data output . output data from the transmission ram selected for read- ing. [7:0]rcv_out_data input receive fifo(s) data output . output data from the receiving ram selected for reading. [7:0]trx_in_data output transmit fifo(s) data input . input data to all transmission rams. [2:0]trx_sel output high transmit fifo(s) select . selects one of the seven transmission rams for reading. [8:0]trx_wr_ptr output transmit fifo(s) write pointer . write address to all transmission rams. [8:0]trx_rd_ptr output transmit fifo(s) read pointer . read address to all transmission rams. [6:0]trx_wrb output low transmit fifo(s) write strobe . write enable. one bit per transmission ram. [7:0]rcv_in_data output receive fifo(s) data input . input data to all receiving rams. [2:0]rcv_sel output high receive fifo(s) select . selects one of the seven receiving rams for reading. [8:0]rcv_wr_ptr output receive fifo(s) write pointer . write address to all receiving rams. [8:0]rcv_rd_ptr output receive fifo(s) read pointer . read address to all receiving rams. [6:0]rcv_wrb output low receive fifo(s) write strobe . write enable. one bit per receiving ram. dpll interface signal type assertion description osc_clk input oscillator clock . attach a 48-mhz clock signal for full-speed operation or a 6-mhz clock signal for low-speed operation. usb_clk_ext input usb clock external . this is the output clock signal from an external dpll. this clock should run at 12 mhz for full-speed operation or 1.5 mhz for low-speed operation. if an external dpll is not used, this pin should be connected to vdd or gnd. usb_rxd_out output synchronized usb differential received data . this signal comes from the usb differen- tial receiver and is synchronized with the oscillator input. this signal connects to the ex- ternal dpll if it is used.
n W722 usb hub/compound device controller n 8 oki semiconductor functional description the W722 provides oki? sie, a hcc, a hr, and a status/descriptor/register file block in four highly integrated submodules. the submodule partitioning allows custom configurations to be easily devel- oped. oki also offers optional usb fifo controller and application interface logic modules to form a usb compound device function. serial interface engine oki? sie handles the usb communication protocol and performs: clock generation packet sequencing signal generation/detection crc generation/checking bit-stuffing packetid generation/decoding when the W722 is in a compound device application, the oki sie can be shared by both the hub function and the embedded function. core controller the hcc includes: a request parser to interpret the host requests/tokens to both the default endpoint 0 and the status change endpoint 1. a (dma) controller/pointer block, which is capable of handling aborts and retries, to handle data movement from/to the status descriptor memory and the register file. a parallel read/write interface to a customer? microcontroller. optional control state machines to execute requests, respond to tokens, and handle errors if customers choose not to use a microcontroller. repeater the hr includes: repeater logic to manage connectivity on a per packet basis. it can handle any combination of full- speed and low-speed devices at the downstream ports. it also supports exception handling, such as fault recovery, suspend/resume as directed by the host, and remote-wakeup and frame timer synchronization. four-port state machines which can interpret and respond to bus events, such as connect/disconnect detection, port enable/disable, suspend/resume, reset, and power switching. the power manager and central clocking circuitry. port state machine the port state machine logic can be implemented as an external port, or an internal port for communica- tion with an embedded function. to expand the hub megamacro function, additional port state machine functional blocks can be added.
n W722 usb hub/compound device controller n 9 oki semiconductor descriptors the descriptors/status/register file block includes standard and hub descriptors, hub and port status, and the register file to store all control and status information. fifo control the fifo controller/application interface block: manages all first-in/first-out (fifo) operations for the embedded functions provides a parallel read/write interface to the customer? application supports up to eight asynchronous fifos (four transmit and four receive). the fifos can be configured as described in the table below. endpoint 3 and 7 are two-level fifos that support up to two separate data sets of variable sizes. all fifos have flags that detect full and empty conditions and have the capability of retransmitting or re- receiving the current data set. the fifo controller logic can be customized to support various fifo/end- point requirements. usb interface the W722 connects to the usb via oki? usb transceiver. the usb-specific input/output (i/o ) converts the W722? internal unidirectional signals into usb-compliant signals. the usb transceiver allows the designer? application module to interface with the physical layer of the usb. by controlling the select signal, the usb is capable of transmitting and receiving serial data at both full-speed (12 mbps) and low- speed (1.5 mbps) data rates. fifo configuration fifo type endpoint address programmable (bytes) function transmit 0 64 control transfers transmit 5 64 interrupt and bulk transfers transmit 6 64 interrupt and bulk transfers transmit 7 2k isochronous, interrupt, and bulk transfers receive 0 64 control transfers receive 1 64 bulk transfers receive 2 64 bulk transfers receive 3 2k isochronous and bulk transfers
n W722 usb hub/compound device controller n 10 oki semiconductor glossary term explanation bandwidth the amount of data transmitted per unit of time, typically bits per second (bps) or bytes per second (bps). bit a unit of information used by digital computers. represents the smallest piece of addressable memory within a computer. a bit expresses the choice between two possibilities and is typically represented by a logical one (1) or zero (0). bit stuffing insertion of a ??bit into a data stream to cause an electrical transition on the data wires which allows a pll to remain locked. bulk transfer nonperiodic, large burst communication typically used for a transfer that can use any available bandwidth and also be delayed until bandwidth is available. control transfer one of four universal serial bus transfer types. control transfers support configuration/command/status type communications between client and function. crc see cyclic redundancy check. cyclic redundancy check a check performed on data to see if an error has occurred in transmitting, reading, or writing the data. the result of a crc is typically stored or transmitted with the checked data. the stored or transmitted result is compared to a crc calculated for the data to determine if an error has occurred. device endpoint a uniquely identifiable portion of a universal serial bus device that is the source or sink of information in a communication flow between the host and device. endpoint see device endpoint. interrupt transfer one of four universal serial bus transfer types. interrupt transfers characteristics are small data, nonperiodic, low frequency, bounded latency, device initiated communication typically used to notify the host of device service needs. isochronous transfer one of four universal serial bus transfer types. isochronous transfers are used when working with isochronous data. isochronous transfers provide periodic, continuous communication between host and device. nonreturn-to-zero-invert a method of encoding serial data in which ones and zeroes are represented by opposite and alternating high and low voltages where there is no return to zero (reference) voltage between encoded bits. eliminates the need for clock pulses. nrzi see nonreturn-to-zero-invert. pll phase-locked-loop. a circuit that acts as a phase detector to keep an oscillator in phase with an incoming frequency. protocol a specific set of rules, procedures, or conventions relating to format and timing of data transmission between two devices. transaction the delivery of service to an endpoint. consists of a token packet, optional data packet, and optional handshake packet. specific packets are allowed or required based on the transaction type. transfer one or more bus transactions to move information between a software client and its function. transfer type determines the characteristics of the data flow between a software client and its function. four transfer types are defined: control, interrupt, bulk, and isochronous. universal serial bus a collection of universal serial bus devices and the software and hardware that allow them to connect the capabilities provided by functions to the host. universal serial bus interface the hardware interface between the universal serial bus cable and a universal serial bus device. this includes the protocol engine required for all universal serial bus devices to be able to receive and send packets. usb see universal serial bus.
n W722 usb hub/compound device controller n 11 oki semiconductor appendix 0.5 m m msm13r0000 sog and msm98r000 csa usb i/o library data sheets the following section contains usb i/o library data sheets
n W722 usb hub/compound device controller n 12 oki semiconductor
n W722 usb hub/compound device controller n 13 oki semiconductor
n W722 usb hub/compound device controller n 14 oki semiconductor
oki semiconductor the information contained herein can change without notice owing to product and/or technical improvements. please make sure before using the product that the information you are referring to is up-to-date. the outline of action and examples of application circuits described herein have been chosen as an explanation of the standard action and performance of the product. when you actually plan to use the product, please ensure that the outside conditions are reflected in the actual circuit and assembly designs. oki assumes no responsibility or liability whatsoever for any failure or unusual or unexpected operation resulting from misuse, neglect, improper installation, repair, alteration or accident, improper handling, or unusual physical or electrical stress including, but not limited to, exposure to parameters outside the specified maximum ratings or operation outside the specified operating range. neither indemnity against nor license of a third party's industrial and intellectual property right,etc.is granted by us in connection with the use of product and/or the information and drawings contained herein. no responsibility is assumed by us for any infringement of a third party's right which may result from the use thereof. when designing your product, please use our product below the specified maximum ratings and within the specified operating ranges, including but not limited to operating voltage, power dissipation, and operating temperature. the products listed in this document are intended for use in general electronics equipment for commercial applications (e.g.,office automation, communication equipment, measurement equipment, consumer electronics, etc.).these products are not authorized for use in any system or application that requires special or enhanced quality and reliability characteristics nor in any system or application where the failure of such system or application may result in the loss or damage of property or death or injury to humans. such applications include, but are not limited to: traffic control, automotive, safety, aerospace, nuclear power control, and medical, including life support and maintenance. certain parts in this document may need governmental approval before they can be exported to certain countries. the purchaser assumes the responsibility of determining the legality of export of these parts and will take appropriate and necessary steps, at their own expense, for export to another country. copyright 1996 oki semiconductor oki semiconductor reserves the right to make changes in specifications at anytime and without notice. this information furnished by oki semiconductor in this publication is believed to be accurate and reliable. however, no responsibility is assumed by oki semiconductor for its use; nor for any infringements of patents or other rights of third parties resulting from its use. no license is granted under any patents or patent rights of oki. references see the usb specification revision 1.0 for more information on usb functionality.
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