M16C26A Datasheet, PDF (101/352 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

M16C/26A Group (M16C/26A, M16C/26B, M16C/26T)
11. DMAC
DMA0 request cause select register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DM0SL
Address
03B816
After reset
0016
Bit symbol
Bit name
Function
RW
DSEL0 _{DMA request cause}
Refer to note
RW
select bit
DSEL1
RW
DSEL2
RW
DSEL3
RW
(b5-b4)
Nothing is assigned. When write, set to “0”.
When read, its content is “0”.
DMS
DMA request cause
expansion select bit
0: Basic cause of request
1: Extended cause of request
RW
DSR
Software DMA
request bit
A DMA request is generated by
setting this bit to “1” when the DMS
bit is “0” (basic cause) and the
RW
DSEL3 to DSEL0 bits are “0001 2”
(software trigger).
The value of this bit when read is “0” .
NOTE:
1. The causes of DMA0 requests can be selected by a combination of DMS bit and DSEL3 to DSEL0 bits in the
manner described below.
DSEL3 to DSEL0
0 0 0 02
0 0 0 12
0 0 1 02
0 0 1 12
0 1 0 02
0 1 0 12
0 1 1 02
0 1 1 12
1 0 0 02
1 0 0 12
1 0 1 02
1 0 1 12
1 1 0 02
1 1 0 12
1 1 1 02
1 1 1 12
DMS=0(basic cause of request)
Falling edge of INT0 pin
Software trigger
Timer A0
Timer A1
Timer A2
Timer A3
Timer A4
Timer B0
Timer B1
Timer B2
UART0 transmit
UART0 receive
UART2 transmit
UART2 receive
A/D conversion
UART1 transmit
DMS=1(extended cause of request)
–
–
–
–
–
–
Two edges of INT0 pin
–
–
–
–
–
–
–
–
–
Figure 11.2 DM0SL Register
Rev. 2.00 Feb.15, 2007 page 84 of 329
REJ09B0202-0200