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AT43USB325 Datasheet(PDF) 66 Page - ATMEL Corporation

Part # AT43USB325
Description  Multimedia USB Keyboard Controller with Embedded Hub
PDF  109 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT43USB325 Datasheet(HTML) 66 Page - ATMEL Corporation

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3355C–USB–4/05
AT43USB325
8.1.3
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.
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:
11. If Control Read: set DIR, clear RX
SETUP, fill FIFO, set TX Packet
Ready in CAR0
12. If Control Write: clear DIR in CAR0
13. If no Data Stage: set Data End,
clear DIR, set Force STALL in
CAR0
14. Set UIAR[EP0 INTACK] to clear
the interrupt source



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