参数资料
型号: 101-0525
厂商: Rabbit Semiconductor
文件页数: 104/142页
文件大小: 0K
描述: COMPUTER SINGLE-BOARD LP3500 FOX
标准包装: 50
系列: SBC
模块/板类型: 单板计算机模块
适用于相关产品: LP3500
其它名称: 316-1058
58
Fox (LP3500)
Reads the voltage of an analog input channel by serial-clocking an 8-bit command to the ADS7870
device by its Direct Mode method. The conversion begins as soon as the last data bit is transferred.
An exception error will occur if Direct Mode bit D7 is not set.
PARAMETER
cmd
contains a gain code and a channel code as follows.
D7—1; D6–D4—Gain Code; D3–D0—Channel Code
Use the following calculation and the tables below to determine cmd:
cmd = 0x80 | (gain_code*16) + channel_code
len
, the output bit length, is always 12 bits.
unsigned int anaInDriver(unsigned int cmd,
unsigned int len);
Gain Code
Multiplier
Voltage
Range
0
1
0–20 V
1
2
0–10 V
2
4
0–5 V
3
5
0–4 V
4
8
0–2.5 V
5
10
0–2 V
6
16
0–1.25 V
7
20
0–1 V
Channel Code
Differential
Input Lines
Channel Code
Single-Ended
Input Lines*
* Negative input is ground.
4–20 mA
Lines
0
+AIN0 -AIN1
8
AIN0
1
+AIN2 -AIN3
9
AIN1
2
+AIN4 -AIN5
10
AIN2
3
+AIN6 -AIN7
11
AIN3
4
Reserved
12
AIN4
Reserved
5
Reserved
13
AIN5
Reserved
6
Reserved
14
AIN6
Reserved
7
Reserved
15
AIN7
Reserved
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