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Rev.2.10 Apr 14, 2006 page 105 of 378
REJ09B0124-0210
M16C/6N Group (M16C/6NK, M16C/6NM) 12. DMAC
Figure 12.2 DM0SL Register
DMA0 Request Source Select Register
Symbol Address After Reset
DM0SL 03B8h 00h
DSEL0
DSEL1
DSEL2
DSEL3
DSR
DMS
-
(b5-b4)
FunctionBit Symbol
Bit Name
DMA request source
select bits
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.
Software DMA
request bit
A DMA request is generated by setting
this bit to 1 when the DMS bit is 0
(basic source) and bits DSEL3 to DSEL0
are 0001b (software trigger).
When read, the content is 0.
DMA request source
expansion select bit
0 : Basic request source
1 : Extended request source
See NOTE 1
RW
RW
RW
RW
-
RW
RW
RW
NOTE:
1. The DMA0 request sources can be selected by a combination of the DMS bit and bits DSEL3 to DSEL0 in the
manner described below.
Bits DSEL3 to DSEL0
DMS = 0 (basic request source) DMS = 1 (extended request source)
0000b
0001b
0010b
0011b
0100b
0101b
0110b
0111b
1000b
1001b
1010b
1011b
1100b
1101b
1110b
1111b
Falling edge of INT0 pin
Software trigger
Timer A0
Timer A1
Timer A2
Timer A3
Timer A4
Two edges of INT0 pin
Timer B0
Timer B3
Timer B1
Timer B4
Timer B2 Timer B5
UART0 transmit
UART0 receive
UART2 transmit
UART2 receive
A/D conversion
UART1 transmit
b7 b6 b5 b4 b3 b2 b1 b0
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