参数资料
型号: USB-EA-CONVZ
厂商: Analog Devices Inc
文件页数: 20/68页
文件大小: 0K
描述: SUPPORT BOARD ADUC8XX
标准包装: 1
类型: 仿真器
适用于相关产品: ADuC8xx
所含物品: 模块
REV. B
ADuC824
–27–
ADC0CON (Primary ADC Control Register)
Used to configure the Primary ADC for range, channel selection, external Ref enable, and unipolar or bipolar coding.
SFR Address
D2H
Power-On Default Value
07H
Bit Addressable
No
—0
F
E
R
X1
H
C0
H
C0
I
N
U2
N
R1
N
R0
N
R
Table V. ADC0CON SFR Bit Designations
Bit
Name
Description
7
Reserved for Future Use
6
XREF0
Primary ADC External Reference Select Bit
Set by user to enable the Primary ADC to use the external reference via REFIN(+)/REFIN(–).
Cleared by user to enable the Primary ADC to use the internal bandgap reference (VREF = 1.25 V).
5
CH1
Primary ADC Channel Selection Bits
4
CH0
Written by the user to select the differential input pairs used by the Primary ADC as follows:
CH1
CH0
Positive Input Negative Input
0
AIN1
AIN2
0
1
AIN3
AIN4
1
0
AIN2
AIN2 (Internal Short)
1
AIN3
AIN2
3
UNI0
Primary ADC Unipolar Bit.
Set by user to enable unipolar coding, i.e., zero differential input will result in 000000 hex output.
Cleared by user to enable bipolar coding, zero differential input will result in 800000 hex output.
2
RN2
Primary ADC Range Bits
1
RN1
Written by the user to select the Primary ADC input range as follows:
0
RN0
RN2
RN1
RN0
Selected Primary ADC Input Range (VREF = 2.5 V)
00
0
±20 mV
00
1
±40 mV
01
0
±80 mV
01
1
±160 mV
10
0
±320 mV
10
1
±640 mV
11
0
±1.28 V
11
1
±2.56 V
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