MCP4728 Microchip Technology Inc., MCP4728 Datasheet - Page 41

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

FIGURE 5-10:
© 2009 Microchip Technology Inc.
Command Type Bits:
Start
C2 C1 C0 W1 W0
0
S
Single Write
Command
1
1
0
1
Device Addressing
1
0
1 DAC1 DAC0 UDAC A V
Note 1:
1st byte
0
A2 A1 A0
2:
Single Write Command: Write to a Single DAC Input Register and EEPROM.
Channel
Select
2nd Byte
The MCP4728 device starts writing EEPROM at the falling edge of the 4th byte’s ACK
pulse.
V
If UDAC = 0 or LDAC Pin = 0: V
EEPROM Write:
C2=0
OUT
ACK (MCP4728)
Update:
R/W
0
C1=1
A
REF
C0=0
PD1 PD0 Gx D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A
3rd Byte
W1=1
OUT
DAC Input Register of Selected Channel
is updated after the 4th byte’s ACK is issued.
W0=1
ACK (MCP4728)
Note 1 and Note 2
4th Byte
MCP4728
DS22187A-page 41
Stop
P