MCP47FVB01 datasheet(35/92 Pages) MICROCHIP

35 / 92 page

 2015 Microchip Technology Inc.

DS20005429B-page 35

MCP48FEBXX

Reference Control Register. Each DAC has two bits to

control the source of the voltage reference of the DAC.

This register is for both the volatile memory locations

and the nonvolatile memory locations.

VOLTAGE REFERENCE (VREF) CONTROL REGISTER (VOLATILE

AND NONVOLATILE) (ADDRESSES 08h AND 18h)

U-0

R/W-0 R/W-0 R/W-0 R/W-0

Single

—

—(1)

—(1) VR0B VR0A

Dual

—

VR1B VR1A VR0B VR0A

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

= Single-channel device

= Dual-channel device

Single

Dual

bit 15-2

bit 15-4

Unimplemented:

Read as ‘0’

bit 1-0

bit 3-0

VRxB-VRxA:

DAC Voltage Reference Control bits

=VREF pin (Buffered); VREF buffer enabled

=VREF pin (Unbuffered); VREF buffer disabled

= Internal Band Gap (1.22V typical); VREF buffer enabled

VREF voltage driven when powered-down

=VDD (Unbuffered); VREF buffer disabled.

Use this state with Power-Down bits for lowest current.

Note 1:

Unimplemented bit, read as ‘0’.

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