DSYNC–Sync DRDY
SYSOCAL–System Offset Calibration
Description: Synchronizes the ADS1242 and ADS1243 to an
external event.
Description: Initiates a system offset calibration. The input
should be set to 0V, and the ADS1242 and ADS1243 compute
the OCR value that compensates for offset errors. The Offset
CalibrationRegister(OCR)isupdatedafterthisoperation. The
user must apply a zero input signal to the appropriate analog
inputs. The OCR register is automatically updated afterwards.
Operands: None
Bytes:
1
Encoding: 1111 1100
Data Transfer Sequence:
Operands: None
Bytes:
1
1111 1100
DIN
Encoding: 1111 0011
Data Transfer Sequence:
SLEEP–Sleep Mode
1111 0011
DIN
Description: Puts the ADS1242 and ADS1243 into a low
power sleep mode. To exit sleep mode, issue the WAKEUP
command.
SYSGCAL–System Gain Calibration
Operands: None
Description: Starts the system gain calibration process. For
a system gain calibration, the input should be set to the
reference voltage and the ADS1242 and ADS1243 compute
the FSR value that will compensate for gain errors. The FSR
is updated after this operation. To initiate a system gain
calibration, the user must apply a full-scale input signal to the
appropriate analog inputs. FCR register is updated automati-
cally.
Bytes:
1
Encoding: 1111 1101
Data Transfer Sequence:
1111 1101
DIN
Operands: None
RESET–Reset to Default Values
Bytes:
1
Description: Restore the registers to their power-up values.
This command stops the Read Continuous mode.
Encoding: 1111 0100
Data Transfer Sequence:
Operands: None
Bytes:
1
1111 0100
DIN
Encoding: 1111 1110
Data Transfer Sequence:
WAKEUP
1111 1110
DIN
Description:WakestheADS1242andADS1243fromSLEEP
mode.
Operands: None
Bytes:
1
Encoding: 1111 1011
Data Transfer Sequence:
1111 1011
DIN
ADS1242, 1243
20
SBAS235B
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