M30622 Mitsubishi, M30622 Datasheet - Page 75

• Manufacturer Part Number: M30622
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

DMAC
Figure 1.16.3. DMAC register (2)
DMAi control register
DMA1 request cause select register
b7
b7
b6
b6
b5
b5
b4
b4
b3
b3
b2
b2
b1
b1
b0
b0
Note 1: DMA request can be cleared by resetting the bit.
Note 2: This bit can only be set to “0”.
Note 3: Source address direction select bit and destination address direction select bit
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
Bit symbol
Bit symbol
DMBIT
DSEL0
DSEL1
DSEL2
DSEL3
DSR
DMASL
DMAS
DMAE
DMS
DSD
DAD
Symbol
DM1SL
Symbol
DMiCON(i=0,1)
cannot be set to “1” simultaneously.
Transfer unit bit select bit
Source address direction
select bit (Note 3)
Destination address
direction select bit (Note 3)
DMA request cause
DMA request cause
expansion bit
Software DMA
request bit
Repeat transfer mode
DMA request bit (Note 1)
DMA enable bit
Bit name
Bit name
select bit
002C
select bit
75
Address
Address
03BA
16
, 003C
16
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”)
0 : Normal
1 : Expanded cause
b3 b2 b1 b0
0 0 0 0 : Falling edge of INT1 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(DMS=0)
0 1 1 0 : Timer A4 (DMS=0)
0 1 1 1 : Timer B0 (DMS=0)
1 0 0 0 : Timer B1
1 0 0 1 : Timer B2
1 0 1 0 : UART0 transmit
1 0 1 1 : UART0 receive
1 1 0 0 : UART2 transmit
1 1 0 1 : UART2 receive
1 1 1 0 : A-D conversion
1 1 1 1 : UART1 receive
16
0 : 16 bits
1 : 8 bits
0 : Single transfer
1 : Repeat transfer
0 : DMA not requested
1 : DMA requested
0 : Disabled
1 : Enabled
0 : Fixed
1 : Forward
0 : Fixed
1 : Forward
/serial I/O3 (DMS=1)
/serial I/O4 (DMS=1)
/two edges of INT1 (DMS=1)
When reset
When reset
00000X00
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
00
Function
Function
16
2
Mitsubishi microcomputers
M16C / 62T Group
R
R
(Note 2)
W
W