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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)： | 19/35頁 |
| 文件大?。?/td> | 124K |
| 代理商： | PCI-ADC |
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Chapter 3
Programming Details
Page 11
Blue Chip Technology Ltd.
01270193.doc
Page 11
The major gain errors are associated with the A-D converter and not with the
input gain stages. The major offset errors are associated with the input gain
stages and not with the A-D converter. This is why the zero samples (used to
determine offsets) are measured at the required gain, whilst the full scale
samples (used to determine gain errors) are measured at minimum gain.
Note that when reading either the calibration zero or positive input, the channel
number stamped on the returned value is not meaningful.
Analogue Input Status
To determine the operating status of the analogue input section, the analogue
input status register is available at Base + 0E
h
. This register allows access to
the status of the A-D converter ‘busy’ flag, the ‘FIFO full’ flag, the ‘FIFO half
full’ flag, and the ‘FIFO empty’ flag.
Analogue Input Status Register
(Base 2 + 0E
h
) Read only
Function
Bit no.
b7..b3
b3
Not used (set to zero)
FIFO ‘Full’ Flag:-
0 = Not Full.
1 = Full.
0 = Not Half Full.
1 = Half Full.
0 = Not Empty.
1 = Empty.
0 = Conversion complete
1 = Conversion in progress
b2
FIFO ‘Half Full’ Flag:-
b1
FIFO ‘Empty’ Flag:-
b0
A-D Converter ‘Busy’ flag:-
Once the FIFO is full, conversions may continue to take place but will be
discarded. The FIFO prevents the storage of further values whilst the ‘Full’ flag
is asserted. Reading one value from the FIFO will negate the Full flag and
allow one more conversion to be stored, which will not be sequential with the
previously stored values. To avoid this situation occurring, it is recommended
that the ‘Half Full’ flag be used to initiate FIFO reads.
Reading an empty FIFO will return a value 0FFFF
h.
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| PCI-DIO | KARTE E/A 32 KANAL PCI BUS |
| PCI-NT | TREIBER SOFTWARE FUER PCI E/A KARTEN |
| PCI-PIO | KARTE E/A 48 KANAL PCI BUS |
| PCI-WDT | UEBERWACHUNGSKARTE PLUG AND PLAY |
| PCI-WIN2000 | WINDOWS 2000 FOR PCI DATA ACQU |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCIB24W9M400A1 | 制造商:Positronic Industries 功能描述: |
| PCIB40 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:40-Ch Digital I/O & Counter Board |
| PCIC16W7M400C1 | 制造商:Positronic Industries 功能描述: |
| PCI-C588 | 功能描述:界面模塊 8 PORT ASYNC SERIAL COMM PCI CARD RoHS:否 制造商:4D Systems 產(chǎn)品:Serial Converters 通道/端口數(shù)量: 數(shù)據(jù)速率: 接口類型:USB, UART 工作電源電壓:3.3 V, 5 V 最大工作溫度: |
| PCI-C6600S4-2-67-167 | 制造商:Johnson Components 功能描述:SBC;DSP, 2 C9701, 2MB SRAM, IN |
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