MCP3564-ESLASHST datasheet(88/108 Pages) MICROCHIP

88 / 108 page

MCP3561/2/4

DS20006181C-page 88

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8.7

MULTIPLEXER (MUX) REGISTER

Name

Bits

Address

Cof

MUX

0x6

R/W

MUX: MULTIPLEXER REGISTER

R/W-0

R/W-1

MUX_VIN+[3:0](2,3)

MUX_VIN-[3:0](2,3)

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

Bit 7-4

MUX_VIN+ Input Selection(2,3)

1111 = Internal VCM

1110 = Internal Temperature Sensor Diode M (Temp Diode M)(1)

1101 = Internal Temperature Sensor Diode P (Temp Diode P)(1)

1100 = REFIN-

1011 = REFIN+

1010 = Reserved (do not use)

1001 = AVDD

1000 = AGND

0111 = CH7

0110 = CH6

0101 = CH5

0100 = CH4

0011 = CH3

0010 = CH2

0001 = CH1

0000 = CH0 (default)

Bit 3-0

MUX_VIN- Input Selection(2,3)

1111 = Internal VCM

1110 = Internal Temperature Sensor Diode M (Temp Diode M)(1)

1101 = Internal Temperature Sensor Diode P (Temp Diode P)(1)

1100 = REFIN-

1011 = REFIN+

1010 = Reserved (do not use)

1001 = AVDD

1000 = AGND

0111 = CH7

0110 = CH6

0101 = CH5

0100 = CH4

0011 = CH3

0010 = CH2

0001 = CH1 (default)

0000 = CH0

Note 1:

Selects the internal temperature sensor diode and forces a fixed current through it. For a correct

temperature reading, the MUX[7:0] selection should be equal to 0xDE.

For MCP3562, the codes, ‘0111/0110/0101/0100’, correspond to a floating input and should be avoided.

For MCP3561, the codes, ‘0111/0110/0101/0100/0011/0010’, correspond to a floating input and should

be avoided.

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