Dmac Control Register 2 (Bits 8-15) - Motorola MVME1X7P Programmer's Reference Manual

DMAC Control Register 2 (bits 8-15)

ADR/SIZ
BIT
15
NAME INTE
OPER R/W
RESET
0 PS
This portion of the control register is loaded by the processor or by the
DMAC when it loads the command word from the command packet.
Because this register is loaded from the command packet in command
chaining mode, the descriptions here also apply to the control word in the
command packet.
D16
TVME
LINC
VINC
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$FFF40034 (8 bits [7 USED] of 32)
14 13 12
SNP
R/W
0 PS
When this bit is high, the DMAC executes D16 cycles on
the VMEbus. When this bit is low, the DMAC executes
D32/D64 cycles on the VMEbus.
This bit defines the direction in which the DMAC
transfers data. When this bit is high, data is transferred to
the VMEbus. When it is low, data is transferred to the
local bus.
When this bit is high, the local bus address counter is
incremented during DMA transfers. When this bit is low,
the counter is not incremented. This bit should normally
be set high. In special situations such as transferring data
to or from a FIFO, it may be desirable to not increment the
counter.
When this bit is high, the VMEbus address counter is
incremented during DMA transfers. When this bit is low,
the counter is not incremented. This bit should normally
be set high. In special situations such as transferring data
to or from a FIFO, it may be desirable to not increment the
counter.
LCSR Programming Model
11 10 9
VINC LINC TVME
R/W R/W R/W
0 PS 0 PS 0 PS
2
8
D16
R/W
0 PS
2-57