MCP4728 Microchip Technology Inc., MCP4728 Datasheet - Page 38

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

MCP4728
FIGURE 5-7:
DS22187A-page 38
Command Type Bits:
Start
S
1
1
Device Addressing
0
Note 1:
1st byte
0 A2 A1 A0
Fast Write Command: Write DAC Input Registers Sequentially from Channel A to D.
X is don’t care bit. V
bringing down the LDAC pin to “Low”.
C2=0
X
X
X
R/W
0
X PD1 PD0 D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A
X PD1 PD0 D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A
X PD1 PD0 D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A
C1=0
A
Fast Write
Command
(C2 C1)
0
2nd Byte
2nd Byte
2nd Byte
OUT
C0=X
0 PD1 PD0 D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A
can be updated after the last byte’s ACK pulse is issued and by
DAC Input Register of Channel D
DAC Input Register of Channel C
DAC Input Register of Channel B
2nd Byte
Update Channel C DAC Input Register at this ACK pulse.
Update Channel C DAC Input Register at this ACK pulse.
Update Channel C DAC Input Register at this ACK pulse.
Repeat Bytes
DAC Input Register of Channel A
ACK (MCP4728)
Update Channel A DAC Input Register at this ACK pulse.
ACK (MCP4728)
ACK (MCP4728)
ACK (MCP4728)
3rd Byte
3rd Byte
3rd Byte
© 2009 Microchip Technology Inc.
3rd Byte
P
Stop