Quatech MPA-200 Uživatelský manuál stáhnout pdf (Strana 28)

D1 -RXSRC, RECEIVE DMA SOURCE:

When set (logic 1), this bit allows the source for receive DMA to

come from the W/REQB pin of channel B on the SCC. When

cleared (logic 0), the source for receive DMA comes from the

W/REQA pin of channel A on the SCC.

D0 -TXSRC, TRANSMIT DMA SOURCE:

When set (logic 1), this bit allows the source for transmit DMA to

come from the DTR/REQA pin of channel A on the SCC. When

cleared (logic 0), the source for transmit DMA comes from the

W/REQA pin of channel A on the SCC.

NOTE:

If both D0 and D1 are cleared (logic 0), then the transmit

and receive DMA requests both come from the W/REQA

pin of channel A on the SCC. Proper board function is

not guaranteed under this condition.

Quatech Inc., MPA-200/300 Manual 22

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 43 44

Žádné komentáře

Quatech MPA-200 Uživatelský manuál Strana 28