參數(shù)資料
型號: PCI-ADC
英文描述: MULTIFUNKTIONSKARTE 44 KANAL PCI BUS
中文描述: MULTIFUNKTIONSKARTE 44卡納爾PCI總線
文件頁數(shù): 22/35頁
文件大?。?/td> 124K
代理商: PCI-ADC
Page 14
Programming Details
Chapter 3
Page 14
01270193.doc
Blue Chip Technology Ltd.
Analogue Outputs
Each analogue output is written as one 12 bit word to one of four word
addresses, each address representing the analogue output channel to be updated
(see Address Map section).
Analogue Output Channel 0
(Base 4 + 0) Read/write
Function
Bit no.
b15..b12
b11..b0
Not used
Output sample (offset binary)
Analogue Output Channel 1
(Base 4 + 2) Read/write
Function
Bit no.
b15..b12
b11..b0
Not used
Output sample (offset binary)
Analogue Output Channel 2
(Base 4 + 4) Read/write
Function
Bit no.
b15..b12
b11..b0
Not used
Output sample (offset binary)
Analogue Output Channel 3
(Base 4 + 6) Read/write
Function
Bit no.
b15..b12
b11..b0
Not used
Output sample (offset binary)
Whenever a new word is written, the relevant analogue output will be updated
immediately.
The values written to the four analogue output sample addresses may be read
back unaltered from the same addresses.
Each output channel may be configured to provide either a constant voltage
source (up to ± 10 volts) or a constant current source (up to ± 20 mA) by writing
to four bits in the Analogue Output Control Register at Base + 0B
h
. Note the
minimum and maximum loads stated in the section “Suitable Interface Signal
Types”.
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