參數(shù)資料
型號: EVAL-AD5272SDZ
廠商: Analog Devices Inc
文件頁數(shù): 11/28頁
文件大?。?/td> 0K
描述: BOARD EVAL FOR AD5272
標(biāo)準(zhǔn)包裝: 1
主要目的: 數(shù)字電位器
嵌入式:
已用 IC / 零件: AD5272
主要屬性: 1 通道,1024 位置
次要屬性: 2.7 ~ 5.5 V,5 ppm/°C,I²C
已供物品: 電路板,CD,器件,穩(wěn)壓器
Data Sheet
AD5272/AD5274
Rev. D | Page 19 of 28
WRITE OPERATION
It is possible to write data for the RDAC register or the control
register. When writing to the AD5272/AD5274, the user must
begin with a start command followed by an address byte (R/W
= 0), after which the AD5272/AD5274 acknowledges that it is
prepared to receive data by pulling SDA low.
Two bytes of data are then written to the RDAC, the most
significant byte followed by the least significant byte; both of
these data bytes are acknowledged by the AD5272/AD5274. A
stop condition follows. The write operations for the AD5272/
AD5274 are shown in Figure 43.
A repeated write function gives the user flexibility to update the
device a number of times after addressing the part only once, as
shown in Figure 44.
SCL
SDA
START BY
MASTER
ACK. BY
AD5272/AD5274
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
MOST SIGNIFICANT DATA BYTE
FRAME 3
LEAST SIGNIFICANT DATA BYTE
SCL (CONTINUED)
SDA (CONTINUED)
ACK. BY
AD5272/AD5274
ACK. BY
AD5272/AD5274
STOP BY
MASTER
0
19
1
99
9
1
01
1
A1
A0
0
C3
C2
C1
C0
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
R/W
0
80
76
-00
5
Figure 43. Write Command
0
80
76
-00
6
SCL
SDA
START BY
MASTER
FRAME 2
MOST SIGNIFICANT DATA BYTE
FRAME 1
SERIAL BUS ADDRESS BYTE
0
19
1
99
9
1
0
1
A1
A0
R/W
0
C3
C2
C1
C0
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
SCL (CONTINUED)
SDA (CONTINUED)
FRAME 3
LEAST SIGNIFICANT DATA BYTE
SCL (CONTINUED)
SDA (CONTINUED)
STOP BY
MASTER
1
99
D7
D6
D5
D4
D3
D2
D1
D0
(CONTINUED)
FRAME 5
LEAST SIGNIFICANT DATA BYTE
1
99
0
C3C2C1
C0
D9
D8
FRAME 4
MOST SIGNIFICANT DATA BYTE
SCL
SDA
ACK. BY
AD5272
2/AD5274
ACK. BY
AD5272
2/AD5274
ACK. BY
AD5272
2/AD5274
ACK. BY
AD5272
2/AD5274
ACK. BY
AD5272
2/AD5274
Figure 44. Multiple Write
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