MCP4728 Microchip Technology Inc., MCP4728 Datasheet - Page 39

• Manufacturer Part Number: MCP4728
• Description: 12-bit, Quad Digital-to-analog Converter With Eeprom Memory
• Manufacturer: Microchip Technology Inc.

FIGURE 5-8:
© 2009 Microchip Technology Inc.
Command Type Bits:
Start
S
(C2 C1 C0 W1 W2)
0
X X X
1
1
Multi-Write
Command
1
Note 3
Device Addressing
0
0
0
X
Note 1:
2nd byte
1st byte
0 A2 A1 A0
0 DAC1 DAC0 UDAC A V
X DAC1 DAC0 UDAC A V
2: The user can write to the other channels by sending repeated bytes with new channel
3:
Multi-Write Command: Write DAC Input Registers.
Channel
selection bits (DAC1,
X is don’t care bit.
Note 2
Select
V
If UDAC = 0 or LDAC Pin = 0: V
C2=0
2nd Byte
OUT
ACK (MCP4728)
Update:
R/W
0
C1=1
A
Repeat Bytes of the 2nd - 4th Bytes
DAC0).
C0=0
REF
REF
PD1 PD0 Gx D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A
PD1 PD0 Gx D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A
W1=0
Repeat Bytes of the 2nd - 4th Bytes
OUT
3rd Byte
3rd Byte
DAC Input Register of Selected Channel
DAC Input Register of Selected Channel
is updated after the 4th byte’s ACK is issued.
W0=0
ACK (MCP4728)
ACK (MCP4728)
MCP4728
4th Byte
4th Byte
DS22187A-page 39
P
Note 1
Note 1
Stop