X9250
Instruction Format
Notes:
(1)
(2)
(2)
(3)
“A1 ~ A0”: stands for the device addresses sent by the master.
WPx refers to wiper position data in the Counter Register
“I”: stands for the increment operation, SI held HIGH during active SCK phase (high).
“D”: stands for the decrement operation, SI held LOW during active SCK phase (high).
Read Wiper Counter Register(WCR)
device type
identifier
device
addresses
instruction
opcode
0
0
1
WCR
addresses
0
wiper position
(sent by X9250 on SO)
CS
Falling
Edge 0 1 0 1 0 0 A A 1
1 0
CS
W W W W W W W W Rising
P P
0
P P P P P P P P Edge
1 0
7 6 5 4 3 2 1 0
Write Wiper Counter Register (WCR)
device type
identifier
device
addresses
instruction
opcode
0
1
0
WCR
addresses
0
Data Byte
(sent by Host on SI)
CS
Falling
Edge 0 1 0 1 0 0 A A 1
1 0
CS
Rising
W W W W W W W W
P P
0
P P P P P P P P Edge
1 0
7 6 5 4 3 2 1 0
Read Data Register (DR)
device type
identifier
device
addresses
instruction
opcode
DR and WCR
addresses
Data Byte
(sent by X9250 on SO)
CS
Falling
Edge 0 1 0 1 0 0 A A 1 0 1 1 R R P
1 0
1 0 1
CS
W W W W W W W W Rising
P
P P P P P P P P Edge
0
7 6 5 4 3 2 1 0
Write Data Register (DR)
device type
device
identifier
addresses
instruction
opcode
DR and WCR
addresses
R
0
P
1
Data Byte
(sent by host on SI)
CS
Falling
Edge 0 1 0 1 0 0 A A 1 1 0 0 R
1 0
1
CS
Rising
W W W W W W W W
P
P P P P P P P P Edge
0
7 6 5 4 3 2 1 0
HIGH-VOLTAGE
WRITE CYCLE
Transfer Data Register (DR) to Wiper Counter Register (WCR)
device type
device
instruction DR and WCR
CS
CS
identifier
addresses
opcode
addresses
Falling
Rising
Edge 0 1 0 1 0 0 A A 1 1 0 1 R R P P Edge
1 0
1 0 1 0
REV 1.1.5 1/31/03
www.xicor.com
Characteristics subject to change without notice.
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XICOR [ XICOR INC. ]
