OPTION_REG datasheet(62/222 Pages) MICROCHIP

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MCP19111

DS22331A-page 62

 2013 Microchip Technology Inc.

9.6

Calibration Word 6

The DIFF<7:0> bits at memory location 2086h 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

OVFCON 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 +4.2 mV. Since one OVFCON count

equals 0.7 mV, this represents six counts of the

OVFCON register. Therefore the value stored at

location 2086h would be 0x06h, where clearing the

DIFF7 bit represents a positive number.

CALWD6: CALIBRATION WORD 6 REGISTER

U-0

—

bit 13

bit 8

R/P-1

DIFF7

DIFF6

DIFF5

DIFF4

DIFF3

DIFF2

DIFF1

DIFF0

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

DIFF<7:0>: OVFCON counts to adjust for differential amplifier offset calibration bits

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