44.6.5 OPAxCON4
Important:
Operational Amplifier Control Register 3- The OFCST
bit is only accessible to the user when the OPA module is in automatic input
offset voltage calibration mode (OFCSEL
=
‘b10
). - It is recommended to perform
the calibration sequence at least once after selecting the automatic input
offset voltage calibration result as the OPA offset source (OFCSEL
=
‘b10
).
Name: | OPAxCON4 |
Address: | 0x123,0x12B |
Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
PTRES | OFCST | OFCSEL[1:0] | |||||||
Access | R/W | R/HC | R/W | R/W | |||||
Reset | 0 | 0 | 0 | 0 |
Bit 4 – PTRES Peak/Trough Detect Reset
Value | Description |
---|---|
1 | Initiate peak/trough detect Reset |
0 | No Reset of peak/trough detect is initiated |
Bit 2 – OFCST Automatic Input Offset Voltage Calibration Start(1,2)
Value | Description |
---|---|
1 | Automatic input offset voltage calibration is started or in progress |
0 | Automatic input offset voltage calibration is complete or not in progress |
Bits 1:0 – OFCSEL[1:0] Input Offset Voltage Source Selection
Value | Description |
---|---|
11 | Reserved |
10 | Result of automatic input offset voltage calibration sequence is used as input offset voltage source |
01 | Value written to the OPAxOFFSET register is used as input offset voltage source |
00 | Factory calibrated input offset voltage value in the OPAxOFFSET register is used as input offset voltage source |