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| 型號(hào)： | ADUC836BS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MicroConverter, Dual 16-Bit-ADCs with Embedded 62 kB Flash MCU |
| 中文描述： | 8-BIT, FLASH, 12.58 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | 14 X 14 MM, MO-022-AC-1, MQFP-52 |
| 文件頁(yè)數(shù)： | 19/80頁(yè) |
| 文件大小： | 5913K |
| 代理商： | ADUC836BS |
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ADuC836
–19–
ADC0CON (Primary ADC Control Register) and ADC1CON (Auxiliary ADC Control Register)
The ADC0CON and ADC1CON SFRs are used to configure the primary and auxiliary ADC for reference and channel selection,
unipolar or bipolar coding and, in the case of the primary ADC, range (the auxiliary ADC operates on a fixed input range of ±V
REF
).
ADC0CON Primary ADC Control SFR
SFR Address D2H
Power-On Default Value 07H
Bit Addressable No
ADC1CON Auxiliary ADC Control SFR
SFR Address D3H
Power-On Default Value 00H
Bit Addressable No
Table VI. 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 band gap reference (V
REF
= 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
0
0
AIN1
0
1
AIN3
1
0
AIN2
1
1
AIN3
3 UNI0 Primary ADC Unipolar Bit.
Set by user to enable unipolar coding, i.e., zero differential input will result in 000000H output.
Cleared by user to enable bipolar coding, i.e., zero differential input will result in 800000H 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 (V
REF
= 2.5 V)
0
0
0
±20 mV
0
0
1
±40 mV
0
1
0
±80 mV
0
1
1
±160 mV
1
0
0
±320 mV
1
0
1
±640 mV
1
1
0
±1.28 V
1
1
1
±2.56 V
Negative Input
AIN2
AIN4
AIN2 (Internal Short)
AIN2
(0 mV–20 mV in Unipolar Mode)
(0 mV–40 mV in Unipolar Mode)
(0 mV–80 mV in Unipolar Mode)
(0 mV–160 mV in Unipolar Mode)
(0 mV–320 mV in Unipolar Mode)
(0 mV–640 mV in Unipolar Mode)
(0 V–1.28 V in Unipolar Mode)
(0 V–2.56 V in Unipolar Mode)
Table VII. ADC1CON SFR Bit Designations
Bit Name Description
7 ––– Reserved for Future Use
6 XREF1 Auxiliary ADC External Reference Bit.
Set by user to enable the auxiliary ADC to use the external reference via REFIN(+)/REFIN(–).
Cleared by user to enable the auxiliary ADC to use the internal band gap reference.
5 ACH1 Auxiliary ADC Channel Selection Bits.
4 ACH0 Written by the user to select the single-ended input pins used to drive the auxiliary ADC as follows:
ACH1 ACH0 Positive Input
0
0
AIN3
0
1
AIN4
1
0
Temp Sensor
1
1
AIN5
3 UNI1 Auxiliary ADC Unipolar Bit.
Set by user to enable unipolar coding, i.e., zero input will result in 0000H output.
Cleared by user to enable bipolar coding, i.e., zero input will result in 8000H output.
2 ––– Reserved for Future Use
1 ––– Reserved for Future Use
0 ––– Reserved for Future Use
Negative Input
AGND
AGND
AGND (Temp Sensor routed to the ADC input)
AGND
NOTES
1. When the temperature sensor is selected, user code must select internal reference via XREF1 bit above and clear the UNI1 bit (ADC1CON.3) to select bipolar coding.
2. The temperature sensor is factory calibrated to yield conversion results 8000H at 0°C.
3. A +1°C change in temperature will result in a +1 LSB change in the ADC1H Register ADC conversion result.
REV. A
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