A3904
Low Voltage Voice Coil Motor Driver
I
2
C Interface Timing Diagram
t
suSTA
t
hdSTA
t
suDAT
t
hdDAT
t
suSTO
t
BUF
SDA
SCL
t
LOW
t
HIGH
Write Register Bit Definition and Timing Diagram
Start
Address
SDA
0
0
0
1
1
x
x
0
AK
D7
D6
D5
Write
Acknowledge
(from A3904)
Control Data
D4
D3
D2
D1
D0
AK
Acknowledge
(from A3904)
Stop
SCL
1
2
3
4
5
6
7
8
9
I
2
C Control Register Bit Definition
Bit
0
1
2
3
4
5
6
7
Name
D0
D1
D2
D3
D4
D5
D6
D7
Function
DAC LSB
DAC MSB
A3904 Slave Address Bit Definition
Bit
0
0
1
0
2
0
3
1
4
1
5
x
6
X
7
1
0
Operation
Read
Write
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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