Data Sheet

MCP4725

6.2 READ COMMAND

If the R/W bit is set to a logic “high”, then the device

outputs on SDA pin, the DAC register and EEPROM

data. Figure 6-3 shows an example of reading the

3 indicates the current condition of the device

operation. The RDY/BSY

bit indicates EEPROM

writing status. The RDY/BSY bit stays low during

EEPROM writng and high when the writing is

completed.

FIGURE 6-3: Read Command and Output Data Format.

1st byte

ACK (MCP4725)

2nd byte 3rd byte

ACK (Master)

4th byte

D3 D2 D0D11 1 0 0 A2 A1 A0 1

RDY/

XXXPD1PD0X XXXXD11 D10 D9 D8 D7 D6 D5 D4

START Bit

Device Code Address Bits

R/W

5th byte 6th byte

D7 D6 D4D5 D3 D2 D1 D0X PD1 PD0 X D11 D10 D9 D8

STOP

Bit

Note 1: Bytes 2 - 6 are repeated in repeat bytes after byte 6.

2: X is don’t care bit.

Read Command

DAC register Data (12 bits)

in DAC Register

Current Settings

See Note 2

EEPROM Write Status Indicate Bit

(1: Completed, 0: Incomplete)

BSY

EEPROM Data

POR

ACK (Master)