X9250 Xicor, X9250 Datasheet - Page 8

• Manufacturer Part Number: X9250
• Description: Quad Digitally Controlled Potentiometers (XDCP)
• Manufacturer: Xicor

X9250
Instruction Format
Notes: (1) “A1 ~ A0”: stands for the device addresses sent by the master.
Read Wiper Counter Register(WCR)
Write Wiper Counter Register (WCR)
Read Data Register (DR)
Write Data Register (DR)
Transfer Data Register (DR) to Wiper Counter Register (WCR)
REV 1.1.5 1/31/03
Falling
Falling
Falling
Falling
Falling
Edge
Edge
Edge
Edge
Edge
CS
CS
CS
CS
CS
(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).
device type
device type
device type
0 1 0 1 0 0
device type
0 1 0 1 0 0
device type
0 1 0 1 0 0
0 1 0 1 0 0
0 1 0 1 0 0
identifier
identifier
identifier
identifier
identifier
addresses
addresses
addresses
addresses
addresses
device
device
device
device
device
A
1
A
1
A
A
A
1
1
1
A
0
A
0
A
A
0
A
0
0
1 1 0 0
1 1 0 1
instruction
instruction
1 0 1 1
1 0 0 1 0 0
1 0 1 0 0 0
instruction
opcode
instruction
instruction
opcode
opcode
opcode
opcode
DR and WCR
R
DR and WCR
1
R
1
DR and WCR
R
1
addresses
addresses
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addresses
addresses
addresses
R
R
0
0
R
0
WCR
WCR
P
P
1
1
P
P
P
1
1
1
P
0
P
0
P
P
P
0
0
0
W
Rising
P
W
W
7
P
P
W
Edge
7
7
P
7
(sent by X9250 on SO)
CS
(sent by X9250 on SO)
(sent by host on SI)
(sent by Host on SI)
W
P
W
W
6
W
P
P
6
6
P
6
wiper position
W
P
5
W
W
W
P
P
5
5
P
5
Data Byte
Data Byte
Data Byte
W
P
4
W
W
W
P
P
P
4
4
4
W
P
3
W
W
W
P
P
3
3
P
3
W
P
2
Characteristics subject to change without notice.
W
W
W
P
P
P
2
2
2
W
P
1
W
W
W
P
P
1
1
P
1
W
P
0
W
W
W
P
P
P
0
0
0
Rising
Edge
Rising
Rising
Rising
Edge
Edge
CS
Edge
CS
CS
CS
HIGH-VOLTAGE
WRITE CYCLE
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