I2C WRITE OPERATION There" />
參數(shù)資料
型號(hào): EVAL-AD5392EBZ
廠商: Analog Devices Inc
文件頁數(shù): 21/44頁
文件大小: 0K
描述: BOARD EVAL FOR AD5392
產(chǎn)品培訓(xùn)模塊: DAC Architectures
標(biāo)準(zhǔn)包裝: 1
DAC 的數(shù)量: 16
位數(shù): 14
采樣率(每秒): 125k
數(shù)據(jù)接口: 串行
設(shè)置時(shí)間: 8µs
DAC 型: 電壓
工作溫度: -40°C ~ 85°C
已供物品: 板,CD
已用 IC / 零件: AD5392
AD5390/AD5391/AD5392
Data Sheet
Rev. E | Page 28 of 44
I2C WRITE OPERATION
There are three specific modes in which data can be written to
the AD539x family of DACs.
4-BYTE MODE
When writing to the AD539x DACs, begin with an address byte
(R/W = 0), after which the DAC acknowledges that it is prepared
to receive data by pulling SDA low. The address byte is followed
by the pointer byte. This addresses the specific channel in the
DAC to be addressed and is also acknowledged by the DAC.
Address Bits A3 to A0 address all channels on the AD5390/
AD5391. Address Bits A2 to A0 address all channels on the
AD5392. Address Bit A3 is a zero on the AD5392. Two bytes
of data are then written to the DAC, as shown in Figure 33.
A STOP condition follows. This lets the user update a single
channel within the AD539x at any time and requires four bytes
of data to be transferred from the master.
REG0
DB13
DB12
DB11
DB10
DB8
DB9
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
REG1
1
0
A3
A2
A1
A0
1
AD1
AD0
R/W
SCL
SDA
SCL
SDA
START
CONDITION
BY
MASTER
ACK
BY
CONVERTER
ACK
BY
CONVERTER
ADDRESS BYTE
POINTER BYTE
MSB
ACK
BY
CONVERTER
ACK
BY
CONVERTER
STOP
CONDITION
BY
MASTER
MOST SIGNIFICANT DATA BYTE
LEAST SIGNIFICANT DATA BYTE
A/B
03773-
023
Figure 33. AD5390/AD5392 4-Byte Mode I2C Write Operation
REG0
DB11
DB10
DB9
DB8
DB6
DB7
DB5
DB4
DB3
DB2
DB1
DB0
0
REG1
1
0
A3
A2
A1
A0
1
AD1
AD0
R/W
SCL
SDA
SCL
SDA
START
CONDITION
BY
MASTER
ACK
BY
CONVERTER
ACK
BY
CONVERTER
ADDRESS BYTE
POINTER BYTE
MSB
ACK
BY
CONVERTER
ACK
BY
CONVERTER
STOP
CONDITION
BY
MASTER
MOST SIGNIFICANT DATA BYTE
LEAST SIGNIFICANT DATA BYTE
A/B
03773-
021
Figure 34. AD5391 4-Byte Mode I2C Write Operation
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