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
1
0
0
1
WCR
addresses
0
0
P
1
wiper position
(sent by X9250 on SO)
CS
Falling
Edge 0 1 0 1 0 0 A A
1 0
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 Wiper Counter Register (WCR)
device type
identifier
device
addresses
instruction
opcode
1
0
1
0
0
WCR
addresses
0
P
1
Data Byte
(sent by Host on SI)
CS
Falling
Edge 0 1 0 1 0 0 A A
1 0
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
Read Data Register (DR)
device type
identifier
device
addresses
A
1
A
0
instruction
opcode
1 0 1 1
DR and WCR
addresses
R
1
R
0
P
1
Data Byte
(sent by X9250 on SO)
CS
Falling
Edge 0 1 0 1 0 0
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
identifier
device
addresses
A
1
A
0
instruction
opcode
1 1 0 0
DR and WCR
addresses
R
1
R
0
P
1
Data Byte
(sent by host on SI)
CS
Falling
Edge 0 1 0 1 0 0
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
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 R1 R0 P1 P0 Edge
1 0
8
FN8165.1
March 25, 2005
INTERSIL [ INTERSIL CORPORATION ]
