M16C6K9 Datasheet, PDF (72/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
DMAC
DMA0 request factor selection register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DM0SL
Address
03B816
When reset
0016
Bit symbol
DSEL0
DSEL1
DSEL2
DSEL3
Bit name
DMA request factor
selection bits
Function
RW
b3 b2 b1 b0
0 0 0 0 : Falling edge of INT0 pin
0 0 0 1 : Software trigger
0 0 1 0 : Timer A0
0 0 1 1 : Timer A1
0 1 0 0 : Timer A2
0 1 0 1 : Timer A3
0 1 1 0 : Timer A4 (DMS=0)
/two edges of INT0 pin (DMS=1)
0 1 1 1 : Timer B0 (DMS=0)
Timer B3 (DMS=1)
1 0 0 0 : Timer B1 (DMS=0)
Timer B4 (DMS=1)
1 0 0 1 : Timer B2 (DMS=0)
Timer B5 (DMS=1)
1 0 1 0 : UART0 transmit (DMS=0)
/IBF0(DMS=1)
1 0 1 1 : UART0 receive (DMS=0)
/IBF1(DMS=1)
1 1 0 0 : UART2 transmit (DMS=0)
/IBF2(DMS=1)
1 1 0 1 : UART2 receive(DMS=0)
/IBF3(DMS=1)
1 1 1 0 : A-D conversion
1 1 1 1 : UART1 transmit
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
DMS
DSR
DMA request factor
expansion bit
Software DMA
request bit
0 : Normal
1 : Expanded factor
If software trigger is selected, a
DMA request is generated by
setting this bit to “1” (When read,
the value of this bit is always “0”)
Fig.EC-2 DMAC register (1)
Rev.1.00 Jun 06, 2003 page 72 of 290