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AT43USB326 датащи(PDF) 50 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) 50 Page - ATMEL Corporation

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AT43USB326
3313D–USB–04/06
Control Read Status
Response State
The Function Interface Unit receives an OUT token from the Host with a zero length DATA1
packet. The FIU responds with a NAK until TX_COMPLETE is cleared. The FIU will then ACK
the retried OUT token from the Host and assert an RX_OUT interrupt.
Control Write Data
Response State
The Function Interface Unit receives an OUT token from the Host with a DATA packet. The
FIU places the incoming data into the FIFO, issues an ACK to the host, and asserts an
RX_OUT interrupt.
Hardware
Firmware
1.
OUT token from Host
2.
DATA1(0) from Host
3.
TX Complete = 0 ?
a. If yes, ACK to Host
Set RX OUT
→ INT
b. If no, NAK to Host
4.
Read UISR
5.
Read CSR0
6.
Clear RX OUT, set Data End, set
Force Stall in H/FCAR0.
Note: A SETUP token will clear Data
End, therefore, it is not cleared by
FW in case Host retries.
7.
Set UIAR[EP0 INTACK] to clear
interrupt source
Hardware
Firmware
1.
OUT token from Host
2.
Put DATA0/DATA1 into FIFO
3.
ACK to Host
4.
Set RX OUT
→ INT
5.
Read UISR
6.
Read CSR0
7.
Read FIFO
8.
Clear RX OUT
If last data packet, set Force STALL,
set DATA END.
9.
Set UIAR[EP0 INTACK] to clear the
interrupt source
Repeat steps 1 through 9 until last DATA PACKET:



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