X9421 Datasheet, PDF (12/21 Pages) Xicor Inc. – Single Digitally Controlled (XDCP) Potentiometer

X9421
Transfer Wiper Counter Register (WCR) to Data Register (DR)
CS
Falling
Edge
device type
identifier
0101
device
addresses
1
1
0
A
0
instruction
opcode
1110
register
addresses
R
1
R
0
0
0
CS
Rising
Edge
HIGH-VOLTAGE
WRITE CYCLE
Increment/Decrement Wiper Counter Register (WCR)
device type device instruction
increment/decrement
CS
identifier addresses
Falling
opcode
(sent by master on SDA)
CS
Rising
Edge
0
1
0
1
1
1
0
A
0
0
0
1
0
0
0
0
0
I/D I/D
.
.
.
.
I/D I/D
Edge
Read Status
device type device instruction
Data Byte
CS ^{identifier addresses opcode}
(sent by X9421 on SO) _CS
Falling
Edge
0
1
0
1
1
1
0
A
0
0
1
0
1
0
0
0
1
0
0
0
0
0
0
0
W ^Rising
I ^Edge
P
12
FN8196.1
September 23, 2005