Datasheet

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SBAS317E − APRIL 2004 − REVISED MAY 2006

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ADC Gain Calibration High Byte (GCH)

7 6 5 4 3 2 1 0 Reset Value

SFR D6h MSB 5Fh

All MSC120x devices support 24-bit calibration values.

GCH ADC Gain Calibration High Byte. This is the high byte of the 24-bit word that contains the ADC gain

bits 7−0 calibration. This value is written by the device after performing a calibration. This register is read/writable, so it can

be used for setting calibration values independent of the hardware-generated calibration values.

ADC Input Multiplexer (ADMUX)

7 6 5 4 3 2 1 0 Reset Value

SFR D7h INP3 INP2 INP1 INP0 INN3 INN2 INN1 INN0 01h

INP3−0 Input Multiplexer Positive Input. This selects the positive signal input.

bits 7−4

INP3 INP2 INP1 INP0 POSITIVE INPUT

0 0 0 0 AIN0 (default)

0 0 0 1 AIN1

0 0 1 0 AIN2

0 0 1 1 AIN3

0 1 0 0 AIN4

0 1 0 1 AIN5

0 1 1 0 AIN6 (MSC1200 only; for the MSC1201/02, this pin is internally tied to REFIN−)

0 1 1 1 AIN7 (MSC1200 only; for the MSC1201/02, this pin is internally tied to REFIN−)

1 0 0 0 AINCOM

1 1 1 1 Temperature Sensor (requires ADMUX = FFh)

INN3−0 Input Multiplexer Negative Input. This selects the negative signal input.

bits 3−0

INN3 INN2 INN1 INN0 NEGATIVE INPUT

0 0 0 0 AIN0

0 0 0 1 AIN1 (default)