DS1805 MAXIM [Maxim Integrated Products], DS1805 Datasheet - Page 10

• Manufacturer Part Number: DS1805
• Description: Addressable Digital Potentiometer
• Manufacturer: MAXIM [Maxim Integrated Products]

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
10
© 2002 Maxim Integrated Products
Addressable Digital Potentiometer
Figure 5. 2-Wire Write Protocols
Figure 6. Timing Diagram
REGISTER-0
WRITE POT-1
WRITE REGISTER-0 AND POT-1 (SAME VALUE)
SDA
SCL
____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
MSB
MSB
MSB
0
0
0
1
1
1
STOP
0
0
0
t
BUF
CONTROL
CONTROL
CONTROL
1
1
1
BYTE
BYTE
BYTE
START
A2
A2
A2
A1
A1
A1
A0
A0
A0
t
HD:STA
LSB
LSB
t
LSB
0
0
0
LOW
R/W = 0
R/W = 0
R/W = 0
1
1
MSB
MSB
1
MSB
0
0
0
Printed USA
t
R
1
1
1
t
HD:DAT
COMMAND
COMMAND
COMMAND
0
0
0
BYTE
BYTE
BYTE
1
1
1
t
F
0
0
1
t
HIGH
0
1
1
0
1
1
LSB
LSB
LSB
t
SU:DAT
MSB
MSB
MSB
REPEATED
START
REG-0/POT-1 VALUE
is a registered trademark of Maxim Integrated Products.
DATA
BYTE
DATA
BYTE
DATA
BYTE
REG-0
POT-1
t
SU:STA
t
HD:STA
LSB
LSB
LSB
OPTIONAL
MSB
t
SP
DATA
BYTE
POT-1
t
SU:STO
LSB