MCP19124 datasheet(60/236 Pages) MICROCHIP

60 / 236 page

MCP19124/5

DS20005619A-page 60

 2016 Microchip Technology Inc.

9.2

Calibration Word 2

Calibration Word 2 is at memory location 2081h. It

contains the calibration bits for the desaturation

comparator current measurement input offset voltage.

Firmware must read these values and write them into

the DSTCAL register to implement the factory offset

calibration. The factory offset calibration will minimize

offset voltage. The desaturation comparator is one of

the few examples where the user may want to

implement their own offset voltage values. Writing user

defined values to the DSTCAL register provides this

flexibility. Firmware must read these values and copy

into the DSTCAL Special Function Register located in

Bank 3 at 196h to implement factory calibration values.

CALWD2: CALIBRATION WORD 2 REGISTER

U-0

—

bit 13

bit 8

U-0

R/P-1

—

DST4

DST3

DST2

DST1

DST0

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 13-5

Unimplemented: Read as ‘0’

bit 4-0

DST<4:0>: Desaturation Comparator Current Measure Offset Calibration bits

11111

= Maximum negative offset calibration (-30 mV)

•

10000

= Mid scale (0 mV)

00000

= Mid scale (0 mV)

•

01111

= Maximum positive offset calibration (+30 mV)

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