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MCP19116 Datasheet(PDF) 60 Page - Microchip Technology |
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MCP19116 Datasheet(HTML) 60 Page - Microchip Technology |
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60 / 246 page  MCP19116/7 DS20005479B-page 60 2015-2016 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. This register also contains the trim bits needed to trim the internal 5 k feedback resistor to within 2% using the <RFBT5:0> bits. Firmware must read these values and copy them into the RFBTCAL Special Function Register located in Bank 3 at 197h. REGISTER 9-2: CALWD2: CALIBRATION WORD 2 REGISTER U-0 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 — DST4 DST3 DST2 DST1 DST0 bit 13 bit 8 U-0 U-0 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 — — RFBT5 RFBT4 RFBT3 RFBT2 RFBT1 RFBT0 bit 7 bit 0 Legend: R = Readable bit P = Programmable bit U = Unused bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown bit 13 Unimplemented: Read as ‘0’ bit 12-8 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) bit 7-6 Unimplemented: Read as ‘0’ bit 5-0 RFBT<5:0>: Internal Feedback Resistor Trim bits |
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