
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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