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參數資料
| 型號： | ADUC845 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | ADC |
| 英文描述： | MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU |
| 中文描述： | MicroConverter的多通道ADC的24-/16-Bit與嵌入式62 kB閃存以及單周期控制器 |
| 文件頁數： | 45/108頁 |
| 文件大小： | 1109K |
| 代理商： | ADUC845 |
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ADuC845/ADuC847/ADuC848
ADC1CON (AUXILIARY ADC CONTROL REGISTER) (ADuC845 ONLY)
Rev. A | Page 45 of 108
ADC1CON is used to configure the auxiliary ADC for reference, channel selection, and unipolar or bipolar coding. The auxiliary ADC is
available only on the ADuC845.
SFR Address:
Power-On Default:
Bit Addressable:
D3H
00H
No
Table 27. ADC1CON SFR Bit Designations
Bit No.
Name
7
–––
6
AXREF
Description
Not Implemented. Write Don’t Care.
Auxiliary (ADuC845 only) ADC External Reference Bit.
Set by the user to enable the auxiliary ADC to use the external reference via REFIN±.
Cleared by the user to enable the auxiliary ADC to use the internal band gap reference.
Auxiliary ADC cannot use the REFIN2± reference inputs.
Auxiliary (ADuC845 only) ADC Unipolar Bit.
Set by the user to enable unipolar coding, that is, zero input results in 000000H output.
Cleared by the user to enable bipolar coding, zero input results in 800000H output.
Not Implemented. Write Don’t Care.
Auxiliary ADC Channel Select Bits. Written by the user to select the auxiliary ADC channel.
ACH3
ACH2
ACH1
ACH0 Selected Auxiliary ADC Input Range (V
REF
= 2.5 V).
0
0
0
0
AIN1–AINCOM
0
0
0
1
AIN2–AINCOM
0
0
1
0
AIN3–AINCOM
0
0
1
1
AIN4–AINCOM
0
1
0
0
AIN5–AINCOM
0
1
0
1
AIN6–AINCOM
0
1
1
0
AIN7–AINCOM
0
1
1
1
AIN8–AINCOM
1
0
0
0
AIN9–AINCOM (not a valid selection on the MQFP package)
1
0
0
1
AIN10–AINCOM (not a valid selection on the MQFP package)
1
0
1
0
AIN1–AIN2
1
0
1
1
AIN3–AIN4
1
1
0
0
AIN5–AIN6
1
1
0
1
AIN7–AIN8
1
1
1
0
Temperature Sensor
1
1
1
1
1
AINCOM–AINCOM
5
AUNI
4
3, 2, 1, 0
–––
ACH3, ACH2, ACH1, ACH0
1
Note the following about the temperature sensor:
– When the temperature sensor is selected, user code must select the internal reference via the AXREF bit and clear the AUNI bit (ADC1CON.5) to select bipolar coding.
– Chop mode must be enabled for correct temperature sensor operation.
– The temperature sensor is factory calibrated to yield conversion results 800000H at 0°C (ADC chop on).
– A +1°C change in temperature results in a +1 LSB change in the ADC1H register ADC conversion result.
– The temperature sensor is not available on the ADuC847 or ADuC848.
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