MCP4728 Microchip Technology Inc., MCP4728 Datasheet - Page 43

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

FIGURE 5-12:
Registers.
FIGURE 5-13:
Registers.
© 2009 Microchip Technology Inc.
Command Type Bits:
Command Type Bits:
Start
S
(C2 C1 C0)
1
1
Command
1
Write
Start
0
Device Addressing
S
0
1
Note 1: V
Note 1:
1
1st byte
0 A2 A1 A0
X
Device Addressing
1
2:
Write Command: Write Voltage Reference Selection Bit (V
Write Command: Write Power-Down Selection Bits (PD1, PD0) to the DAC Input
PD1 A PD0 A PD1 B PD0 B A
Channel A
0
V
V
V
V
X is don’t care bit.
X is don’t care bit.
REF
REF
REF
REF
REF
C2=1
C2=1
1st byte
0
= 1: Internal Reference (2.048V)
= 0: V
A = Voltage reference of Channel A
B = Voltage reference of Channel B
C = Voltage reference of Channel C
D = Voltage reference of Channel D
ACK (MCP4728)
A2 A1 A0
R/W
2nd Byte
0
DD
C1=0
C1=0
A
Channel B
R/W
0
C0=0
C0=1
A
(C2 C1 C0)
1
Command
Write
PD1 C PD0 C PD1 D
0
Channel C
0
X V
ACK (MCP4728)
Registers and V
at this falling edge of ACK pulse.
REF
ACK (MCP4728)
A V
at this falling edge of ACK pulse.
Registers and V
Channel D
2nd Byte
REF
3rd Byte
Note 1
PD0 D
B V
OUT
REF
are updated
REF
OUT
C V
X
) to the DAC Input
are updated
REF
MCP4728
X
D A
X
DS22187A-page 43
X
Stop
P
A
Stop
P