X9250 Datasheet, PDF (9/21 Pages) Xicor Inc. – Quad Digitally Controlled Potentiometers (XDCP)

X9250
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
1110
DR and WCR
addresses
RRPP
1010
CS
Rising
Edge
HIGH-VOLTAGE
WRITE CYCLE
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 SI)
I/D I/D . . . . I/D I/D
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
device type device instruction
Data Byte
CS ^{identifier addresses opcode}
(sent by X9250 on SO) _CS
Falling
Edge
0
1
0
1
0
0
A
1
A
0
0
1
0
1
0
0
0
1
0
0
0
0
0
0
W ^Rising
0 I ^Edge
P
REV 1.1.5 1/31/03
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Characteristics subject to change without notice. 9 of 21