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AT43USB353M датащи(PDF) 60 Page - ATMEL Corporation

номер детали AT43USB353M
подробное описание детали  Low Cost Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
PDF  95 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT43USB353M датащи(HTML) 60 Page - ATMEL Corporation

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AT43USB353M
3307B–USB–4/04
No-data Status
Response State
The Function Interface Unit receives an IN token from the Host. The FIU responds with a zero
length DATA1 packet until receiving an ACK from the host, then asserts a TX_COMPLETE
interrupt.
Control Read Data
Response State
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
unti l i t su c ces sf ull y rece i v es an AC K fr om the host . F i na l l y , the F I U cl ears th e
TX_PACKET_READY bit and asserts a TX_COMPLETE interrupt.
Hardware
Firmware
1.
IN token from Host
2.
Send DATA1(0)
3.
ACK from Host
4.
Set TX COMPLETE
→ INT
5.
Read UISR
6.
Read CSR0
7.
If SET ADDRESS, program the new
Address, set ADD_EN bit
8.
Clear TX_COMPLETE, clear Data
End, set Force STALL in CAR0
9.
Set UIAR[EP0 INTACK]
Hardware
Firmware
1.
IN token from Host
2.
a. If TX Packet Ready = 1, send
DATA0/DATA1
b. If TX Packet Ready = 0, send NAK
3.
ACK from Host
4.
Clear TX Packet Ready
Set TX Complete
→ INT
5.
Read UISR
6.
Read CSR0
7.
Clear TX COMPLETE in CAR0:
a. If more data: fill FIFO, set TX
Packet Ready, set DIR in CAR0
b. If no more data: set Force STALL,
set DATA END in CAR0
8.
Set UIAR[EP0 INTACK] to clear
interrupt source
Repeat steps 1 through 8



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