Datasheet

MCP4728

FIGURE 5-8: Multi-Write Command: Write Multiple DAC Input Registers.

2nd Byte

(C2 C1 C0 W1 W2) 3rd Byte 4th Byte

0 1 0 0 0 DAC1 DAC0 UDAC

REF

PD1 PD0 Gx D11 D10 D9 D8 A D7D6D5D4D3D2D1D0 A

ACK (MCP4728)

1st byte

DAC Input Register of Selected Channel

R/W

Device Addressing

ACK (MCP4728)

Repeat Bytes of the 2nd - 4th Bytes

Start

Stop

Multi-Write

S1100A2A1A00A

Command

Note 1: V

OUT

Update:

If UDAC

= 0 or LDAC Pin = 0: V

OUT

is updated after the 4th byte’s ACK is issued.

2: The user can write to the other channels by sending repeated bytes with new channel selection bits (DAC1, DAC0).

3: X is don’t care bit.

Command Type Bits: C2=0 C1=1 C0=0 W1=0 W0=0

Channel

Select

X X X X X DAC1 DAC0 UDAC AV

REF

PD1 PD0 Gx D11 D10 D9 D8 A D7D6D5D4D3D2D1D0 A

ACK (MCP4728)

DAC Input Register of Selected Channel

Note 3

2nd byte 3rd Byte 4th Byte

Repeat Bytes of the 2nd - 4th Bytes

Note 1

Note 2

Channel

Select