參數(shù)資料
型號: AOP-12D
英文描述: 12 CHANNEL DIGITAL TO ANALOGUE
中文描述: 12通道數(shù)模
文件頁數(shù): 25/49頁
文件大?。?/td> 227K
代理商: AOP-12D
Maps and Registers
Page
19
Blue Chip Technology Ltd.
01270146.doc
Page 19
MAPS AND REGISTERS
Card Address Map
BASE
+ n
0
0
1
2
3
4
5
6
7
8
9
10
11
R/W
SECTION
FUNCTION
W
R
W
W
W
DAC
DAC
DAC
DAC
DAC
PIO
PIO
PIO
PIO
Timer
Timer
Timer
Timer
DAC Control register
Initiate DMA transfer / reset state machine logic
Channel Enable register 1
Channel Enable register 2
DAC output data
PIO PORT A data
PIO PORT B data
PIO PORT C data
PIO Control register
Timer 0 count register
Timer 1 count register
Timer 2 count register
Timer control register
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
DAC Control Register
(Base + 0)
DATA BIT
0
1
2
3
4
FUNCTION
DAC Channel Select / update Bit 0 *1
DAC Channel Select / update Bit 1 *1
DAC Channel Select / update Bit 2 *1
DAC Channel Select / update Bit 3 *1
0 = Disable DMA Request
1 = Enable DMA Request
0 = I/O Mode
1 = DMA Mode
0 = Disable DAC control timers (timers 0 and 1)
1 = Enable DAC control timers (timers 0 and 1)
0 = Disable uncommitted timer 2
1 = Enable uncommitted timer 2
5
6
7
*1
writing 0 into all four bits updates the previously selected DAC output
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