Datasheet
REV. B
ADuC824
–29–
ICON (Current Sources Control Register)
Used to control and configure the various excitation and burnout current source options available on-chip.
SFR Address D5H
Power-On Default Value 00H
Bit Addressable No
—OBCI1CDACI0CDANIP2INIP1INE2INE1I
Table VIII. ICON SFR Bit Designations
Bit Name Description
7 — Reserved for Future Use
6 BO Burnout Current Enable Bit
Set by user to enable both transducer burnout current sources in the primary ADC signal paths.
Cleared by user to disable both transducer burnout current sources.
5 ADC1IC Auxiliary ADC Current Correction Bit
Set by user to allow scaling of the Auxiliary ADC by an internal current source calibration word.
4 ADC0IC Primary ADC Current Correction Bit
Set by user to allow scaling of the Primary ADC by an internal current source calibration word.
3 I2PIN
*
Current Source-2 Pin Select Bit
Set by user to enable current source-2 (200 µA) to external pin 3 (P1.2/DAC/IEXC1).
Cleared by user to enable current source-2 (200 µA) to external pin 4 (P1.3/AIN5/IEXC2).
2 I1PIN
*
Current Source-1 Pin Select Bit
Set by user to enable current source-1 (200 µA) to external pin 4 (P1.3/AIN5/IEXC2).
Cleared by user to enable current source-1 (200 µA) to external pin 3 (P1.2/DAC/IEXC1).
1 I2EN Current Source-2 Enable Bit
Set by user to turn on excitation current source-2 (200 µA).
Cleared by user to turn off excitation current source-2 (200 µA).
0 I1EN Current Source-1 Enable Bit
Set by user to turn on excitation current source-1 (200 µA).
Cleared by user to turn off excitation current source-1 (200 µA).
*Both current sources can be enabled to the same external pin, yielding a 400 µA current source.
ADC0H/ADC0M/ADC0L (Primary ADC Conversion Result Registers)
These three 8-bit registers hold the 24-bit conversion result from the Primary ADC.
SFR Address ADC0H High Data Byte DBH
ADC0M Middle Data Byte DAH
ADC0L Low Data Byte D9H
Power-On Default Value 00H All Three registers
Bit Addressable No All Three registers
ADC1H/ADC1L (Auxiliary ADC Conversion Result Registers)
These two 8-bit registers hold the 16-bit conversion result from the Auxiliary ADC.
SFR Address ADC1H High Data Byte DDH
ADC1L Low Data Byte DCH
Power-On Default Value 00H Both Registers
Bit Addressable No Both Registers