Rainbow-electronics AT89C5122 Bedienungsanleitung PDF herunterladen (Seite 98)

98

AT8xC5122/23

4202E–SCR–06/06

Figure 52. Minimum Intervention from the USB Device Firmware

OUT Transactions:

HOST

UFI

C51

OUT DATA0 (n Bytes)

ACK

Endpoint FIFO read (n bytes)

OUT DATA1

NACK

OUT DATA1

ACK

IN Transactions:

HOST

UFI

C51

IN

ACK

Endpoint FIFO write

IN

DATA1

NACK

interrupt C51

IN

DATA1

interrupt C51

Endpoint FIFO write

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