參數(shù)資料
型號: AT43USB325E-AC
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: Multimedia USB Keyboard Controller with Embedded Hub
中文描述: 8-BIT, 12 MHz, RISC MICROCONTROLLER, PQFP64
封裝: 1.40 MM HEIGHT, PLASTIC, MS-026-ACB, LQFP-64
文件頁數(shù): 66/109頁
文件大?。?/td> 643K
代理商: AT43USB325E-AC
66
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
Set RX SETUP
INT
4.
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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