ADUC847 Analog Devices, ADUC847 Datasheet - Page 45

• Manufacturer Part Number: ADUC847
• Description: Precision Analog Microcontroller: 12MIPS 8052 Flash MCU + 10-Ch 24-Bit ADC + 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC847

• Mcu Core: 8052
• Mcu Speed (mips): 12
• Sram (bytes): 2304Bytes
• Gpio Pins: 34
• Adc # Channels: 10
• Other: PWM

ADC1CON (AUXILIARY ADC CONTROL REGISTER) (ADuC845 O
ADC1CON is used to configure the auxiliary ADC for reference, channel selection, and unipo
available only on t
SFR Address:
Power-On Default:
Bi
Table 27
Bit
7
6
5
4
3, 2, 1, 0
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.
t Addressable:
No.
. AD
Name
––
AXREF
AU
––
ACH3, ACH2, ACH1, ACH0
C1CON
–
–
NI
he A
SFR Bit D
D3H
00H
No
DuC8
45.
esignations
Description
Not Implemented.
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 enab
Auxiliary ADC cannot use t
Auxiliary (ADuC845 only) ADC Unipo
Set by the user to enable unipolar cod
Cleared by the user t
Not Implemented. W
Auxiliary ADC Channel Select Bits. Written by the user to select the auxiliary ADC channel.
ACH3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
ACH2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Rev. B | Page 45 of 108
ACH1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Write Don’t Care.
o enable bipolar coding, zero input results in 800000H output.
rite Don’t Care.
he REFIN2± reference inputs.
ACH0 Selected Auxiliary ADC Input Range (V
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
le the auxiliary ADC to use the internal band gap reference.
AINCOM–AINCOM
AIN1–AINCOM
AIN2–AINCOM
AIN4–AINCOM
AIN5–AINCOM
AIN6–AINCOM
AIN7–AINCOM
AIN8–AINCOM
AIN1–AIN2
AIN3–AIN4
AIN5–AIN6
AIN7–AIN8
Temperature Sensor
AIN3–AINCOM
AIN9–AINCOM (not a valid selection on the MQFP package)
AIN10–AINCOM (not a valid selection on the MQFP package)
NLY)
lar Bit.
ing, that is, zero input results in 000000H output.
ADuC845/ADuC847/ADuC848
lar or bipolar coding. The auxiliary ADC is
1
REF
= 2.5 V).