X9401_15 Datasheet, PDF (9/20 Pages) Intersil Corporation – Quad, 64 Tap, Digitally Controlled Potentiometer

X9401
Instruction Format
NOTES:
3. A1 ~ A0”: stands for the device addresses sent by the master.
4. WPx refers to wiper position data in the Counter Register
5. “I”: stands for the increment operation, SI held HIGH during active SCK phase (high).
6. “D”: stands for the decrement operation, SI held LOW during active SCK phase (high).
Read Wiper Counter Register (WCR)
DEVICE
CS
FALLING
TYPE
IDENTIFIER
DEVICE
ADDRESSES
INSTRUCTION
OPCODE
WCR
ADDRESSES
WIPER POSITION
(SENT BY X9401 ON SO)
CS
RISING
EDGE 0 1 0 1 0 0 A1 A0 1 0 0 1 0 0 P1 P0 0 0 WP5 WP4 WP3 WP2 WP1 WP0 EDGE
Write Wiper Counter Register (WCR)
CS
FALLING
EDGE
DEVICE
TYPE
IDENTIFIER
0101
DEVICE
ADDRESSES
0 0 A1 A0
INSTRUCTION
OPCODE
1010
WCR
ADDRESSES
0 0 P1 P0
DATA BYTE
(SENT BY HOST ON SI)
CS
RISING
0 0 WP5 WP4 WP3 WP2 WP1 WP0 EDGE
Read Data Register (DR)
DEVICE
CS
FALLING
TYPE
IDENTIFIER
DEVICE
INSTRUCTION
ADDRESSES
OPCODE
DR AND WCR
ADDRESSES
DATA BYTE
(SENT BY X9401 ON SO)
CS
RISING
EDGE 0 1 0 1 0 0 A1 A0 1 0 1 1 R1 R0 P1 P0 0 0 WP5 WP4 WP3 WP2 WP1 WP0 EDGE
Write Data Register (DR)
DEVICE TYPE DEVICE INSTRUCTION DR AND WCR
DATA BYTE
HIGH-
CS
IDENTIFIER ADDRESSES OPCODE
ADDRESSES
(SENT BY HOST ON SI)
CS VOLTAGE
FALLING
EDGE
0
1
0
1 0 0 A1 A0
1
1
0
0
R1
R0
P1
P0
0
0
WP5
WP4
WP3
WP2
WP1
WP0
RISING
EDGE
WRITE
CYCLE
Transfer Data Register (DR) to Wiper Counter Register (WCR)
CS
FALLING
EDGE
DEVICE
TYPE
IDENTIFIER
0101
DEVICE
ADDRESSES
0 0 A1 A0
INSTRUCTION
OPCODE
DR AND WCR
ADDRESSES
CS
RISING
1 1 0 1 R1 R0 P1 P0 EDGE
Transfer Wiper Counter Register (WCR) to Data Register (DR)
CS
FALLING
EDGE
DEVICE
TYPE
IDENTIFIER
0101
DEVICE
ADDRESSES
0 0 A1 A0
INSTRUCTION
OPCODE
1110
DR AND WCR
ADDRESSES
CS
RISING
R1 R0 P1 P0 EDGE
HIGH-VOLTAGE
WRITE CYCLE
Increment/Decrement Wiper Counter Register (WCR)
CS
FALLING
EDGE
DEVICE TYPE
IDENTIFIER
0101
DEVICE
ADDRESSES
0 0 A1 A0
INSTRUCTION
OPCODE
0010
WCR
ADDRESSES
X X P1 P0
INCREMENT/DECREMENT
(SENT BY MASTER ON SDA)
I/D I/D . . . . I/D I/D
CS
RISING
EDGE
Global Transfer Data Register (DR) to Wiper Counter Register (WCR)
CS
FALLING
DEVICE TYPE
IDENTIFIER
EDGE 0 1 0 1
DEVICE
ADDRESSES
0 0 A1 A0
INSTRUCTION
OPCODE
0001
DR
ADDRESSES
R1 R0 0 0
CS
RISING
EDGE
9
FN8190.5
September 14, 2015