MCP4725 Microchip Technology, MCP4725 Datasheet - Page 16

• Manufacturer Part Number: MCP4725
• Description: 12-Bit Digital-to-Analog Converter
• Manufacturer: Microchip Technology

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MCP4725
5.6
The MCP4725 device has a 14-bit wide EEPROM
memory to store configuration bit (2 bits) and DAC
input data (12 bits). These bits are readable and re-writ-
able with I
on-chip charge pump circuit to write the EEPROM
memory bits without using an external program volt-
age.
The EEPROM writing operation is initiated when the
device receives an EEPROM write command (C2 = 0,
C1 = 1, C0 = 1). The configuration and writing data bits
TABLE 5-3:
TABLE 5-4:
DS22039C-page 16
Bit
Function
Note 1:
Bit
Function
Note 1:
Factory
Default
Name
Value
Name
Bit
Bit
2:
Non-Volatile EEPROM Memory
2
C interface commands. The device has an
See
Bit D11 = ‘1’ (while all other bits are “0”) enables the device to output 0.5 * V
Write EEPROM status indication bit (0:EEPROM write is not completed. 1:EEPROM write is complete.)
Power-Down
PD1
C2 C1 C0
0
Command
(2 bits)
Select
Table 5-2
Type
EEPROM MEMORY AND FACTORY DEFAULT SETTINGS
(TOTAL NUMBER OF BITS: 14 BITS)
DAC REGISTER
PD0
0
(1)
for details.
RDY/
D11
1
BSY
(1)
(2)
POR PD1 PD0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
D10
0
D9
Power-
Select
0
Down
D8
0
D7
DAC Input Data (12 bits)
0
are transferred to the EEPROM memory block. A
status bit, RDY/BSY, stays low during the EEPROM
writing and goes high as the write operation is
completed. While the RDY/BSY bit is low (during the
EEPROM writing), any new write command is ignored
(for EEPROM or DAC register).
EEPROM bits and factory default settings.
shows the DAC input register bits of the MCP4725.
D6
0
D5
0
Data (12 bits)
D4
0
© 2007 Microchip Technology Inc.
DD
D3
(= middle scale output).
0
Table 5-3
D2
0
D1
0
shows the
Table 5-4
D0
0