MCP4728 Microchip Technology Inc., MCP4728 Datasheet - Page 45

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

FIGURE 5-15:
© 2009 Microchip Technology Inc.
Start
S
RDY/
RDY/
RDY/
RDY/
RDY/
RDY/
RDY/
RDY/
BSY
BSY
BSY
BSY
BSY
BSY
BSY
BSY
1
Device Code
1
POR DAC1 DAC 0 0
POR DAC1 DAC 0 0
POR DAC1 DAC 0 0
POR DAC1 DAC 0 0
POR DAC1 DAC 0 0
POR DAC1 DAC 0 0
POR DAC1 DAC 0 0
POR DAC1 DAC 0 0
Read Command
0
0 A2 A1 A0
Note 1: The 2nd - 4th bytes are the contents of the DAC Input Register and the 5th - 7th bytes
Address Bits
Read Command and Device Outputs.
2nd Byte
2nd Byte
2nd Byte
2nd Byte
5th Byte
5th Byte
5th Byte
5th Byte
are the EEPROM contents.
The device outputs sequentially from channel A to D.
POR Bit: 1 = Set (Device is powered on with V
A2 A1 A0 A
A2 A1 A0 A
A2 A1 A0 A
A2 A1 A0 A
A2 A1 A0 A
A2 A1 A0 A
A2 A1 A0 A
A2 A1 A0 A
R/W
1
A
Channel C DAC Input Register
Channel D DAC Input Register
Channel A DAC Input Register
Channel B DAC Input Register
ACK (MCP4728)
Channel A DAC EEPROM
Channel B DAC EEPROM
Channel C DAC EEPROM
Channel D DAC EEPROM
V
V
V
V
V
V
V
V
REF
REF
REF
REF
REF
REF
REF
REF
PD1 PD0 G
PD1 PD0 G
PD1 PD0 G
PD1 PD0 G
PD1 PD0 G
PD1 PD0 G
PD1 PD0 G
PD1 PD0 G
3rd Byte
X
X
X
X
X
X
X
X
3rd Byte
3rd Byte
3rd Byte
6th Byte
6th Byte
6th Byte
6th Byte
D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A P
D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A P
D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A P
D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A P
D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A P
D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A P
D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A P
D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A P
DD
ACK (MCP4728)
> V
POR
), 0 = Powered off state.
MCP4728
4th Byte
7th Byte
4th Byte
7th Byte
4th Byte
7th Byte
4th Byte
7th Byte
Repeat
DS22187A-page 45
Stop
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Stop
Stop
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