X9251_14 Datasheet, PDF (10/21 Pages) Intersil Corporation – Single Supply/Low Power/256-Tap/SPI Bus, Quad Digitally-Controlled Potentiometer

X9251
Instruction Format
Read Wiper Counter Register (WCR)
CS
FALLING
EDGE
DEVICE TYPE
IDENTIFIER
0101
DEVICE
ADDRESSES
0 0 A1 A0
INSTRUCTION
OPCODE
1001
WCR
ADDRESSES
00 0 0
WIPER POSITION
(SENT BY X9251 ON SO)
WWWWWWWW
CCCCCCCC
RRRRRRRR
76543210
CS
RISING
EDGE
Write Wiper Counter Register (WCR)
CS
FALLING
EDGE
DEVICE TYPE
IDENTIFIER
0101
DEVICE
ADDRESSES
0 0 A1 A0
INSTRUCTION
OPCODE
1010
WCR
ADDRESSES
DATA BYTE
(SENT BY HOST ON SI)
0 0 0 0 WWWWWWWW
CCCCCCCC
RRRRRRRR
76543210
CS
RISING
EDGE
Read Data Register (DR)
CS
FALLING
EDGE
DEVICE TYPE
IDENTIFIER
0101
DEVICE
ADDRESSES
0 0 A1 A0
INSTRUCTION
OPCODE
1011
DR AND WCR
ADDRESSES
RB RA P1 P0
DATA BYTE
(SENT BY X9271 ON SO)
DDDDDDDD
76543210
CS
RISING
EDGE
Write Data Register (DR)
CS
DEVICE TYPE
DEVICE
INSTRUCTION
DR AND WCR
DATA BYTE
CS
FALLING IDENTIFIER
ADDRESSES
OPCODE
ADDRESSES
(SENT BY HOST ON SI)
RISING
EDGE
EDGE
0 1 0 1 0 0 A1 A0 1 1 0 0 RB RA P1 P0 D D D D D D D D
76543210
HIGH-VOLTAGE
WRITE CYCLE
Global Transfer Data Register (DR) to Wiper Counter Register (WCR)
CS FALLING
EDGE
DEVICE TYPE
IDENTIFIER
0101
DEVICE
ADDRESSES
0 0 A1 A0
INSTRUCTION
OPCODE
0001
DR
ADDRESSES
RB RA 0
CS RISING
EDGE
0
Global Transfer Wiper Counter Register (WCR) to Data Register (DR)
CS
FALLING
EDGE
DEVICE TYPE
IDENTIFIER
0101
DEVICE
ADDRESSES
0 0 A1 A0
INSTRUCTION
OPCODE
1000
DR
ADDRESSES
RB RA 0 0
CS
RISING
EDGE
HIGH-VOLTAGE
WRITE CYCLE
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
RB RA 0 0
CS
RISING
EDGE
HIGH-VOLTAGE
WRITE CYCLE
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FN8166.6
December 3, 2014