9
9-9
32170/32174 Group User's Manual (Rev. 2.1)
DMAC
9.2 DMAC Related Registers
s DMA3 Channel Control Register (DM3CNT)
<Address: H'0080 0440>
D0
123
456
D7
MDSEL3
TREQF3
REQSL3
TENL3
TSZSL3
SADSL3
DADSL3
<When reset : H'00>
D
Bit Name
Function
R
W
0
MDSEL3
0 : Normal mode
(Selects DMA3 transfer mode)
1 : Ring buffer mode
1
TREQF3
0 : Not requested
(DMA3 transfer request flag)
1 : Requested
2, 3
REQSL3
00 : Software start
(Selects cause of DMA3 request)
01 : Serial I/O0 (transmit buffer empty)
10 : Serial I/O1 (reception completed)
11 : MJT (TIN0 input signal)
4
TENL3
0 : Disables transfer
(Enables DMA3 transfer)
1 : Enables transfer
5
TSZSL3
0 : 16 bits
(Selects DMA3 transfer size)
1 : 8 bits
6
SADSL3
0 : Fixed
(Selects DMA3 source address direction) 1 : Incremental
7
DADSL3
0 : Fixed
(Selects DMA3 destination
1 : Incremental
address direction)
W =
: Only writing a 0 is effective; when you write a 1, the previous value is retained.