Zilog Z80180 Manual de usuario Pagina 114

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Z8018x
Family MPU User Manual
UM005003-0703
99
Table 14 describes all DMA TRANSFER mode combinations of DM0
DM1, SM0 SM1. Because I/O to/from I/O transfers are not implemented,
12 combinations are available.
Table 13. Channel 0 Source
SM1 SM0 Memory/I/O Address lncrement/Decrement
00Memory + 1
01Memory -1
1 0 Memory fixed
11I/O fixed
Table 14. Transfer Mode Combinations
DM1 DM0 SM1 SM0 Transfer Mode Increment/Decrement
0000Memory
to Memory SAR0+1, DAR0+1
0001Memory
to Memory SAR0-1, DAR0+1
0010Memory*
to Memory SAR0 fixed, DAR0+ 1
0011I/O
to Memory SAR0 fixed DAR0+1
0100Memory
to Memory SAR0+1, DAR0-1
0101Memory
to Memory SAR0-1,DAR0-1
0110Memory
to Memory SAR0 fixed, DAR0-1
0111I/O
to Memory SAR0 fixed. DAR0-1
1000Memory
to Memory* SAR0+ 1, DAR0 fixed
1001Memory
to Memory* SAR0-1, DAR0 fixed
1010Reserved
1011Reserved
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