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X9251US24IZ Datasheet(PDF) 11 Page - Intersil Corporation

Part # X9251US24IZ
Description  Single Supply/Low Power/256-Tap/SPI Bus
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

X9251US24IZ Datasheet(HTML) 11 Page - Intersil Corporation

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11
FN8166.2
September 14, 2005
INSTRUCTION FORMAT
Read Wiper Counter Register (WCR)
Write Wiper Counter Register (WCR)
Read Data Register (DR)
Write Data Register (DR)
Global Transfer Data Register (DR) to Wiper Counter Register (WCR)
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).
CS
Falling
Edge
Device Type
Identifier
Device
Addresses
Instruction
Opcode
WCR
Addresses
Wiper Position
(Sent by X9251 on SO)
CS
Rising
Edge
0
1
0
1
0
0 A1 A0 100
100
0
0
W
C
R
7
W
C
R
6
W
C
R
5
W
C
R
4
W
C
R
3
W
C
R
2
W
C
R
1
W
C
R
0
CS
Falling
Edge
Device Type
Identifier
Device
Addresses
Instruction
Opcode
WCR
Addresses
Data Byte
(Sent by Host on SI)
CS
Rising
Edge
0
1
0
1
0
0 A1 A0 1
0
1000
0
0
W
C
R
7
W
C
R
6
W
C
R
5
W
C
R
4
W
C
R
3
W
C
R
2
W
C
R
1
W
C
R
0
CS
Falling
Edge
Device Type
Identifier
Device
Addresses
Instruction
Opcode
DR and WCR
Addresses
Data Byte
(Sent by X9271 on SO)
CS
Rising
Edge
0
10100 A1 A0 1
0
1
1 RB RA P1 P0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
CS
Falling
Edge
Device Type
Identifier
Device
Addresses
Instruction
Opcode
DR and WCR
Addresses
Data Byte
(Sent by Host on SI)
CS
Rising
Edge
0
1
0
1
00 A1 A0 11 00 RB RA P1 P0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
CS
Falling
Edge
Device Type
Identifier
Device
Addresses
Instruction
Opcode
DR
Addresses
CS
Rising
Edge
010
100 A1 A0 0
0
0
1
RB RA
0
0
X9251


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