Datasheet

ADS1217
22
SBAS260C
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SELFCAL Offset and Gain Self Calibration
Description: Starts the process of self calibration. The Offset
Control Register (OCR) and the Full-Scale Register (FSR) are
updated with new values after this operation.
Operands: None
Bytes: 1
Encoding: 1111 0000
Data Transfer Sequence:
SELFOCAL Offset Self Calibration
Description: Starts the process of self-calibration for offset.
The Offset Control Register (OCR) is updated after this opera-
tion.
Operands: None
Bytes: 1
Encoding: 1111 0001
Data Transfer Sequence:
SELFGCAL Gain Self Calibration
Description: Starts the process of self-calibration for gain.
The Full-Scale Register (FSR) is updated with new values after
this operation.
Operands: None
Bytes: 1
Encoding: 1111 0010
Data Transfer Sequence:
SYSOCAL System Offset Calibration
Description: Starts the system offset calibration process. For
a system offset calibration the input should be set to 0V
differential, and the ADS1217 computes the OCR register
value that will compensate for offset errors. The Offset Control
Register (OCR) is updated after this operation.
Operands: None
Bytes: 1
Encoding: 1111 0011
Data Transfer Sequence:
SYSGCAL System Gain Calibration
Description: Starts the system gain calibration process. For
a system gain calibration, the differential input should be set to
the reference voltage and the ADS1217 computes the FSR
register value that will compensate for gain errors. The FSR is
updated after this operation.
Operands: None
Bytes: 1
Encoding: 1111 0100
Data Transfer Sequence:
Calculate Checksum
CSARAM for all RAM Banks
Description: Calculate the checksum of all RAM Banks. The
checksum is calculated as a sum of all the bytes with the carry
ignored. All bits are included in the checksum calculation, there
is no masking of bits.
Operands: None
Bytes: 1
Encoding: 1110 1000
Data Transfer Sequence:
D
IN
1110 1000 • • •
(1)
xxxx xxxx
D
OUT
Checksum
D
IN
1111 0000
D
IN
1111 0001
D
IN
1111 0010
D
IN
1111 0011
D
IN
1111 0100
NOTE: (1) For wait time, refer to timing specification.