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参数资料
| 型号： | AD5254EVAL |
| 厂商： | Analog Devices, Inc. |
| 元件分类： | 通用总线功能 |
| 英文描述： | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
| 中文描述： | 双路、256抽头、非易失、I2C接口、数字电位器 |
| 文件页数： | 14/28页 |
| 文件大小： | 834K |
| 代理商： | AD5254EVAL |
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AD5253/AD5254
I
2
C INTERFACE
Rev. 0 | Page 14 of 28
t
1
SCL
SDA
P
S
P
0
t
3
t
2
t
8
t
9
t
8
t
9
t
4
t
5
t
7
t
6
t
10
Figure 23. I
2
C Interface Timing Diagram
I
2
C INTERFACE GENERAL DESCRIPTION
From Master to Slave
From Slave to Master
S = Start Condition.
P = Stop Condition.
A = Acknowledge (SDA Low).
A = Not Acknowledge (SDA High).
R/W = Read Enable at High; Write Enable at Low.
R/W
A/A
S
SLAVE ADDRESS
(7-BIT)
A
0 WRITE
A
INSTRUCTIONS
(8-BIT)
DATA TRANSFERRED
(N BYTES + ACKNOWLEDGE)
DATA
(8-BIT)
P
0
Figure 24. I
2
C—Master Writing Data to Slave
R/W
A
S
SLAVE ADDRESS
(7-BIT)
1 READ
DATA TRANSFERRED
(N BYTES + ACKNOWLEDGE)
DATA
(8-BIT)
DATA
(8-BIT)
P
0
A
A
Figure 25. I
2
C—Master Reading Data From Slave
R/W
R/W
S
SLAVE ADDRESS
(7-BIT)
READ OR WRITE
(N BYTES +
ACKNOWLEDGE)
SLAVE ADDRESS
DATA
A
S
0
REPEATED START
READ
OR WRITE
DIRECTION OF TRANSFER MAY
CHANGE AT THIS POINT
A
A/A
(N BYTES +
ACKNOWLEDGE)
DATA
P
A/A
Figure 26. I
2
C—Combined Write/Read
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