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參數(shù)資料
| 型號： | ADM00317 |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 47/86頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD DAUGHTER MCP4706/16/26 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| DAC 的數(shù)量： | 3 個，每 IC 1 個 |
| 位數(shù)： | 8，10，12 |
| 設(shè)置時間： | 6µs |
| DAC 型： | 電壓 |
| 已供物品： | 子板 |
| 已用 IC / 零件： | MCP4706，MCP4716，MCP4726 |
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2011-2012 Microchip Technology Inc.
DS22272C-page 51
MCP4706/4716/4726
6.2
Write Volatile Memory
(C2:C0 = 010)
This Write command is used to update the volatile DAC
register value and Configuration bits. The EEPROM is
not affected by this command. Figure 6-2 shows an
example of this Write command.
The volatile DAC register and Configuration bits are
updated with the written date at the completion of the
ACK bit (falling edge of SCL).
After this ACK bit, the I2C master should generate a
Stop bit or the I2C master can repeat the 2nd
(3 command bits + 5 Configuration bits), and the 3rd
byte (8 data bits (b15:b08)), and the 4th byte (8 data
bits (b07:b00)). Repeating the 2nd through 4th bytes
allows a continuous command where the volatile DAC
register and Configuration bits can be updated without
the communication overhead of the device addressing
byte (1st byte).
FIGURE 6-2:
Write Volatile Memory Command.
Device Addressing
Data bits (8 bits) (3rd byte)
Note 1: The device updates VOUT at the falling edge of the SCL at the end of this ACK pulse.
Note 1
2: The 2nd-4th bytes can be repeated after the 4th byte by continued clocking before issuing Stop bit.
Command
3: ACK bit generated by MCP47X6.
Note 2
b15 b14 b13 b12 b11 b10 b09 b08 b07 b06 b05 b04 b03 b02 b01 b00
MCP4726
D11 D10 D09 D08 D07 D06 D05 D04 D03 D02 D01 D00
X
MCP4716
D09 D08 D07 D06 D05 D04 D03 D02 D01 D00
X
MCP4706
D07 D06 D05 D04 D03 D02 D01 D00
X
SDA
SCL
A2 A1 A0
1
00
01
PD1 PD0
G
0 b15 b14 b13 b12 b11 b10 b09 b08
0
Ref.
Data bits (16 bits) (3rd + 4th bytes)
Start bit
ACK bit (3)
Read/Write bit (Write)
Stop bit
S
A
R/W
A
Power-
bits
Down
bits
ACK bit (3)
Legend:
X
= don’t care
D11:D00 = 12-bit data for MCP4726 device
D09:D00 = 10-bit data for MCP4716 device
D07:D00 = 8-bit data for MCP4706 device
0
VREF1
VREF0
Data bits (8 bits) (4th byte)
b07 b06 b05 b04 b03 b02 b01 b00
0
A
P
ACK bit (3)
Voltage
Select
bits
Gain
bit
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