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AT43USB326 датащи(PDF) 48 Page - ATMEL Corporation

номер детали AT43USB326
подробное описание детали  Multimedia USB Keyboard Controller with Embedded Hub
PDF  102 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT43USB326 датащи(HTML) 48 Page - ATMEL Corporation

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AT43USB326
3313D–USB–04/06
The following information describes how the AT43USB326’s USB hardware and firmware
operates during a control transfer between the host and the hub’s or function’s control
endpoint.
Idle State
This is the default state from power-up.
Setup Response State
The Function Interface Unit (FIU) receives a SETUP token with 8 bytes of data from the Host.
The FIU stores the data in the FIFO, sends an ACK back to the host and asserts an
RX_SETUP interrupt.
Legend:
DATA1/DATA0 = Data packet with DATA1 or DATA2 PID
DATA1(0) = Zero length DATA1 packet
Hardware
Firmware
1.
SETUP token, Data from Host
2.
ACK to Host
3.
Store data in FIFO
4.
Set RX SETUP
→ INT
5.
Read UISR
6.
Read CSR0
7.
Read Byte Count
8.
Read FIFO
9.
Parse command data
10. Write to H/FCAR0:
a. If Control Read: set DIR, clear RX
SETUP, fill FIFO, set TX Packet
Ready in CAR0
b. If Control Write: clear DIR in CAR0
c. If no Data Stage: set Data End, clear
DIR, set Force STALL in CAR0
11. Set UIAR[EP0 INTACK] to clear the
interrupt source



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