M16C30P_07 Datasheet, PDF (100/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

M16C/30P Group
13. DMAC
DMA1 Request Factor Select Register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
After Reset
DM1SL
03BAh
00h
Bit Symbol
Bit Name
Function
RW
DSEL0 DMA Request factor Select Bit (NOTE 1)
RW
DSEL1
RW
DSEL2
RW
DSEL3
RW
—
Nothing is assigned. When w rite, set to “0”.
(b5-b4) When read, their contents are “0”.
—
DMA Request Factor Expansion 0: Basic factor of request
DMS _{Select Bit}
1: Extended factor of request
RW
Softw are DMA Request Bit
DSR
A DMA request is generated by setting this bit to
“1” w hen the DMS bit is “0” (basic factor) and the
DSEL3 to DSEL0 bits are “0001b” (softw are
RW
trigger).
The value of this bit w hen read is “0”.
NOTES :
1. The factors of DMA1 requests can be selected by a combination of DMS bit and DSEL3 to DSEL0 bits in the manner
described below .
DSEL3 to DSEL0
DMS=0(Basic Factor of Request)
_____
0000b
Falling Edge of INT1 Pin
DMS=1(Extended Factor of Request)
—
0001b
Softw are Trigger
—
0010b
Timer A0
—
0011b
Timer A1
—
0100b
Timer A2
—
0101b
—
—
0110b
0111b
—
Timer B0
—
_____
Tw o Edges of INT1 Pin
1000b
Timer B1
—
1001b
Timer B2
—
1010b
UART0 Transmit
—
1011b
UART0 Receive/ACK0
—
1100b
UART2 Transmit
—
1101b
UART2 Receive/ACK2
—
1110b
A/D Conversion
—
1111b
UART1 Receive/ACK1
—
Figure 13.3 DM1SL Register
Rev.1.22 Mar 29, 2007 Page 84 of 291
REJ09B0179-0122