OPTION_REG datasheet(61/222 Pages) MICROCHIP

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DS22331A-page 61

MCP19111

9.5

Calibration Word 5

The DIFC<7:0> bits at memory location 2085h contain

the offset voltage information for the output voltage

difference amplifier. The value is an 8-bit two’s

complement number that represents the number of the

OVCCON counts needed to adjust for the differential

amplifier offset. This value can be used to completely

remove the differential amplifier offset.

For example, the offset of the differential amplifier is

measured to be -64 mV. Since one OVCCON count

equals 16 mV, this represents 4 counts of the

OVCCON register. Therefore, the value stored at

location 2085h would be 0x84h, where the setting of

the DIFC7 bit represents a negative number.

CALWD5: CALIBRATION WORD 5 REGISTER

U-0

—

bit 13

bit 8

R/P-1

DIFC7

DIFC6

DIFC5

DIFC4

DIFC3

DIFC2

DIFC1

DIFC0

bit 7

bit 0

Legend:

R = Readable bit

P = Programmable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 13-8

Unimplemented: Read as ‘0’

bit 7-0

DIFC<7:0>: OVCCON counts to adjust for differential amplifier offset calibration bits

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