參數(shù)資料
型號(hào): M30240S9-XXXFP
廠商: Mitsubishi Electric Corporation
英文描述: 16 Characters x 2 Lines, 5x7 Dot Matrix Character and Cursor
中文描述: 單片16位CMOS微機(jī)
文件頁數(shù): 65/142頁
文件大?。?/td> 1637K
代理商: M30240S9-XXXFP
1-65
Mitsubishi microcomputers
M30240 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Preliminary Specifications REV. E
Specifications in this manual are tentative and subject to change
DMAC
Figure 1.55: DMAC register (2)
Figure 1.56: DMAC register (3)
DMAi control register
Symbol
DMiCON(i=0,1)
Address
002C
16
, 003C
16
When reset
00000X00
2
Bit name
Function
Bit symbol
Transfer unit bit select bit
b7
b6
b5
b4
b3
b2
b1
b0
0 : 16 bits
1 : 8 bits
DMBIT
R
W
DMASL
DMAS
DMAE
Repeat transfer mode
select bit
0 : Single transfer
1 : Repeat transfer
DMA request bit (Note 1)
0 : DMA not requested
1 : DMA requested
0 : Disabled
1 : Enabled
0 : Fixed
1 : Forward
DMA enable bit
Source address direction
select bit (Note 3)
Destination address
direction select bit (Note 3)
0 : Fixed
1 : Forward
DSD
DAD
Nothing is assigned.
These bits can neither be set nor reset. When read, the value of these bits is “0”.
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
cannot be set to “1” simultaneously.
(Note 2)
b7
b0
b7
b0
(b8)
(b15)
Function
R W
Transfer counter
Set a value one less than the transfer count
Symbol
TCR0
TCR1
Address
0029
16
, 0028
16
0039
16
, 0038
16
When reset
Indeterminate
Indeterminate
DMAi transfer counter (i = 0, 1)
specification
0000
16
to FFFF
16
b7
(b23)
b3
b0
b7
b0
b7
b0
(b8)
(b16)(b15)
(b19)
Function
R W
Source pointer
Stores the source address
Nothing is assigned.
These bits can neither be set nor reset. When read, the value of these bits is “0”.
Symbol
SAR0
SAR1
Address
When reset
Indeterminate
Indeterminate
0022
16
to 0020
16
0032
16
to 0030
16
DMAi source pointer (i = 0, 1)
Transfer count
specification
00000
16
to FFFFF
16
Symbol
DAR0
DAR1
Address
0026
16
to 0024
16
0036
16
to 0034
16
When reset
Indeterminate
Indeterminate
b3
b0
b7
b0
b7
b0
(b8)
(b15)
(b16)
(b19)
Function
R W
Destination pointer
Stores the destination address
DMAi destination pointer (i = 0, 1)
Transfer count
specification
00000
16
to FFFFF
16
b7
(b23)
Nothing is assigned.
These bits can neither be set nor reset. When read, the value of these bits is “0”.
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