at83c5122 ATMEL Corporation, at83c5122 Datasheet - Page 98

• Manufacturer Part Number: at83c5122
• Description: At83c5123 C51 Microcontroller With Usb And Smart Card Reader Interfaces
• Manufacturer: ATMEL Corporation

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AT8xC5122/23
HOST
UFI
C51
IN Transactions:
HOST
UFI
C51
OUT Transactions:
OUT DATA0 (n Bytes)
IN
Endpoint FIFO write
NACK
Figure 52. Minimum Intervention from the USB Device Firmware
ACK
IN
interrupt C51
DATA1
Endpoint FIFO read (n bytes)
OUT
DATA1
IN
NACK
DATA1
OUT
ACK
interrupt C51
DATA1
Endpoint FIFO write
4202E–SCR–06/06
ACK