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參數(shù)資料
| 型號： | AT43USB326-AU |
| 廠商： | Atmel Corp. |
| 英文描述： | Multimedia USB Keyboard Controller with Embedded Hub |
| 中文描述： | 多媒體USB鍵盤控制器的嵌入式集線器 |
| 文件頁數(shù)： | 52/102頁 |
| 文件大?。?/td> | 511K |
| 代理商： | AT43USB326-AU |
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52
AT43USB326
3313D–USB–04/06
Interrupt/Bulk IN
Transfers at Function
Endpoint
The firmware must first condition the endpoint through the Endpoint Control Register,
FENDP1/2_CNTR:
Set endpoint direction: set EPDIR
Set interrupt or bulk: EPTYPE = 11 or 10
Enable endpoint: set EPEN
The Function Interface Unit receives an IN token from the Host. The FIU responds with NAKs
until TX_PACKET_READY is set. The FIU then sends the data in the FIFO upstream, retrying
until it successfully receives an ACK from the host. Finally, the FIU clears the
TX_PACKET_READY bit and asserts a TX_COMPLETE interrupt.
1.
Read UISR
2.
Read FCSR1/2
3.
Clear TX_COMPLETE
If more data: fill FIFO, set TX Packet Ready
Wait for TX_COMPLETE interrupt
If no more data: set DATA END in FCAR1/2
4.
Set UIAR[FEP1/2 INTACK] to clear the interrupt source
Interrupt/Bulk OUT
Transfers at Function
Endpoint EP1 and 2
The firmware must first condition the endpoint through the Endpoint Control Register,
FENDP1/2_CNTR:
Set endpoint direction: clear EPDIR
Set interrupt or bulk: EPTYPE = 11 or 10
Enable endpoint: set EPEN
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.
1.
Read UISR
2.
Read FCSR1/2
3.
Read FIFO
4.
Clear RX_OUT
If more data:
Wait for RX_OUT interrupt
If no more data: set DATA END
5.
Set UIAR[FEP1/2 INTACK] to clear the interrupt source
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相關(guān)代理商/技術(shù)參數(shù) |
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| AT43USB351M | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Missed Watchdog Timer Reset |
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| AT43USB351M-AC | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Full-speed/ Low-speed USB Microcontroller with ADC and PWM |
| AT43USB353M | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Missed Watchdog Timer Reset |
| AT43USB353M_03 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Low Cost USB Microcontroller with Hub, ADC and PWM |
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