X9400 Datasheet, PDF (9/22 Pages) Xicor Inc. – Quad Digitally Controlled Potentiometers (XDCP)

X9400
Increment/Decrement Wiper Counter Register (WCR)
CS
Falling
Edge
device type
identifier
0101
device
addresses
0
0
A
1
A
0
instruction
opcode
0010
WCR
addresses
X
X
P
1
P
0
increment/decrement
(sent by master on SDA)
I/ I/
DD
.
.
.
.
I/ I/
DD
CS
Rising
Edge
Global Transfer Data Register (DR) to Wiper Counter Register (WCR)
CS
Falling
Edge
device type
identifier
0101
device
addresses
0
0
A
1
A
0
instruction
opcode
0001
DR
addresses
R
1
R
0
0
0
CS
Rising
Edge
Global Transfer Wiper Counter Register (WCR) to Data Register (DR)
CS
Falling
Edge
device type
identifier
0101
device
addresses
0
0
A
1
A
0
instruction
opcode
1000
DR
addresses
R
1
R
0
0
0
CS
Rising
Edge
HIGH-VOLTAGE
WRITE CYCLE
Read Status
CS
Falling
Edge
device type
identifier
0101
device
addresses
0
0
A
1
A
0
instruction
opcode
0101
wiper
addresses
0001
Data Byte
(sent by X9400 on SO) _CS
W ^Rising
0 0 0 0 0 0 0 I ^Edge
P
REV 1.1.4 10/11/02
www.xicor.com
Characteristics subject to change without notice. 9 of 22