6. DMA Controller
69
DMA Overflow Enable Register
Use DMAOVFE to specify whether all 26 bits or only the lower 16 bits of the target and
requestor addresses are incremented or decremented during buffer transfers and
whether all 24 bits of the byte count or only the lower 16 bits of the byte count are
incremented or decremented during buffer transfers. A byte count configured for 16-bit
decrementing expires when it is decremented from 0000h to FFFFh.
REGISTER:
ADDRESS:
AT ADDRESS:
ACCESS:
D7
D6
D5
D4
D3
D2
D1
D0
---
R/W
1= All bits of channel 0 target address and byte count inc/dec
0= Only lower 16 bits of channel 0 target address and byte count inc/dec
DMAOVFE
0F01Dh
DMA overflow enable register
Reserved
1
1
0
0
1= All bits of channel 0 requestor address inc/dec
0= Only lower 16 bits of channel 0 requestor address inc/dec
1= All bits of channel 1 target address and byte count inc/dec
0= Only lower 16 bits of channel 1 target address and byte count inc/dec
Reserved
1= All bits of channel 1 requestor address increment/decrement
0= Only lower 16 bits of channel 1 requestor address inc/dec
DMA Overflow Enable Register
