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參數(shù)資料
| 型號(hào)： | ADUC845 |
| 廠商： | Analog Devices, Inc. |
| 元件分類(lèi)： | 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(yè)數(shù)： | 44/108頁(yè) |
| 文件大小： | 1109K |
| 代理商： | ADUC845 |
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ADuC845/ADuC847/ADuC848
ADC0CON2 (PRIMARY ADC CHANNEL SELECT REGISTER)
ADC0CON2 is used to select a reference source and channel for the primary ADC.
Rev. A | Page 44 of 108
SFR Address:
Power-On Default:
Bit Addressable:
E6H
00H
No
Table 26. ADC0CON2 SFR Bit Designations
Bit No.
Name
7, 6
XREF1, XREF0
Description
Primary ADC External Reference Select Bit.
Set by the user to enable the primary ADC to use the external reference via REFIN± or REFIN2±.
Cleared by the user to enable the primary ADC to use the internal band gap reference (V
REF
= 1.25 V).
XREF1
XREF0
0
0
Internal 1.25 V Reference.
0
1
REFIN± Selected.
1
0
REFIN2± (AIN3/AIN4) Selected.
1
1
Reserved.
Not Implemented. Write Don’t Care.
Not Implemented. Write Don’t Care.
Primary ADC Channel Select Bits. Written by the user to select the primary ADC channel as follows:
CH3
CH2
CH1
CH0
Selected Primary ADC Input Channel.
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 (CSP package only; not a valid selection on the MQFP package)
1
0
0
1
AIN10–AINCOM (CSP package only; 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
AIN9–AIN10 (CSP package only; not a valid selection on the MQFP package)
1
1
1
1
AINCOM–AINCOM
5
4
3, 2, 1, 0
–––
–––
CH3, CH2, CH1, CH0
Note that because the reference-detect does not operate on the REFIN2± pair, the REFIN2± pins can go below 1 V.
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