X9250_06 Datasheet, PDF (9/20 Pages) Intersil Corporation – Quad Digitally Controlled Potentiometers

X9250
Instruction Format
Notes: (1) “A1 ~ A0”: stands for the device addresses sent by the master.
(2) WPx refers to wiper position data in the Counter Register
(2) “I”: stands for the increment operation, SI held HIGH during active SCK phase (high).
(3) “D”: stands for the decrement operation, SI held LOW during active SCK phase (high).
Read Wiper Counter Register(WCR)
CS
Falling
Edge
device type
identifier
0101
device
addresses
0
0
A
1
A
0
instruction
opcode
1001
WCR
addresses
0
0
P
1
P
0
wiper position
(sent by X9250 on SO) _CS
W W W W W W W W ^Rising
P P P P P P P P ^Edge
76543210
Write Wiper Counter Register (WCR)
CS
Falling
Edge
device type
identifier
0101
device
addresses
0
0
A
1
A
0
instruction
opcode
1010
WCR
addresses
0
0
P
1
P
0
Data Byte
(sent by Host on SI)
CS
W W W W W W W W ^Rising
P P P P P P P P ^Edge
76543210
Read Data Register (DR)
CS
Falling
Edge
device type
identifier
0101
device
addresses
0
0
A
1
A
0
instruction
opcode
1011
DR and WCR
addresses
RRPP
1010
Data Byte
(sent by X9250 on SO) _CS
W W W W W W W W ^Rising
P P P P P P P P ^Edge
76543210
Write Data Register (DR)
device type device
CS ^{identifier addresses}
Falling
Edge
0
1
0
1
0
0
A
1
A
0
instruction
opcode
1100
DR and WCR
Data Byte
addresses
(sent by host on SI)
CS
R
1
R
0
P
1
P
0
W W W W W W W W ^Rising
P P P P P P P P ^Edge
76543210
HIGH-VOLTAGE
WRITE CYCLE
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
1101
DR and WCR
addresses
R1 R0 P1 P0
CS
Rising
Edge
9
FN8165.3
August 29, 2006