MCP47FXB2XT-EST datasheet(62/124 Pages) MICROCHIP

62 / 124 page

MCP47FXBX4/8

DS20006368A-page 62

 2020 Microchip Technology Inc.

Control register. Each DAC has one bit to control the

gain of the DAC.

GAIN CONTROL AND I2C SLAVE ADDRESS REGISTER

ADDRESS 1Ah (NONVOLATILE)

R/W-n R/W-n R/W-n R/W-n R/W-n R/W-n R/W-n R/W-n

R/W-n R/W-n R/W-n R/W-n R/W-n R/W-n R/W-n

Octal

ADLCK ADD6 ADD5 ADD4 ADD3 ADD2 ADD1 ADD0

Quad

—(1)

ADLCK ADD6 ADD5 ADD4 ADD3 ADD2 ADD1 ADD0

bit 15

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

= Quad-channel device

= Octal-channel device

Octal

Quad

—

bit 15-12 Unimplemented: Read as ‘0’

bit 15-8

bit 11-8

Gn: DACn Output Driver Gain Control bits

1 = 2x Gain

0 = 1x Gain

bit 7

ADLCK: I2C Address Lock Status bit (reflects the state of the high-voltage SALCK bit).

1 = I2C Slave Address is Locked (requires HV command to disable, so I2C address can be

changed)

0 = I2C Slave Address is NOT Locked, the nonvolatile I2C Slave Address can be changed

bit 6-0

ADD6-ADD0: I2C 7-bit Slave Address bits.

For nonvolatile devices, the ADD6-ADD2 bits form the upper five bits of the I2C address and

can be user-modified.

For volatile devices, the upper five bits of the I2C address are fixed at '0b11000' and cannot be

changed by the user. Other values could be available on demand, contact a sales representa-

tive for more information.

The lower two bits are determined by the state of the A0 and A1 pins. A VIH level corresponds

to a bit value of '1', while a VIL level to a '0'. Leaving the pins unconnected is the equivalent of a

'0' bit value.

Note 1:

Unimplemented bit, read as ‘0’.

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