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): 68/109頁
文件大?。?/td> 643K
代理商: AT43USB325E-AC
68
3355C–USB–4/05
AT43USB325
8.1.6
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.
8.1.7
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.
Set UIAR[EP0 INTACK] to clear
interrupt source
7.
Hardware
Firmware
1.
OUT token from Host
2.
Put DATA0/DATA1 into FIFO
3.
ACK to Host
Set RX OUT
INT
4.
5.
Read UISR
6.
Read CSR0
7.
Read FIFO
8.
Clear RX OUT
If last data packet, set Force
STALL, set DATA END.
Set UIAR[EP0 INTACK] to clear
the interrupt source
9.
Repeat steps 1 through 9 until last DATA PACKET:
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