x9430 Intersil Corporation, x9430 Datasheet - Page 8

• Manufacturer Part Number: x9430
• Description: Dual Digitally Controlled Potentiometer Xdcp ?with Operational Amplifier
• Manufacturer: Intersil Corporation

X9430 – Preliminary Information
REGISTER DESCRIPTIONS AND MEMORY MAP
Memory Map
Instruction Format
Notes: (1) “A1 ~ A0”: stands for the device addresses sent by the master.
Read Wiper Counter Register (WCR)
Read the contents of the Wiper Counter Register pointed to by P
Write Wiper Counter Register (WCR)
Write new value to the Wiper Counter Register pointed to by P
Read Data Register (DR)
Read the contents of the Register pointed to by P
Write Data Register (DR)
Write new value to the Register pointed to by P
REV 1.0 6/20/00
Falling
Falling
Falling
Falling
Edge
Edge
Edge
Edge
CS
CS
CS
CS
(2) WPx refers to wiper position data in the Wiper Counter Register
(3) “I”: stands for the increment operation, SI held HIGH during active SCK phase (high).
(4) “D”: stands for the decrement operation, SI held LOW during active SCK phase (high).
device type
device type
0 1 0 1 0 0
device type
0 1 0 1 0 0
device type
0 1 0 1 0 0
0 1 0 1 0 0
WCRO
identifier
identifier
identifier
identifier
DR0
DR1
DR2
DR3
addresses
addresses
addresses
addresses
device
device
device
device
A
1
A
A
A
1
1
1
A
0
A
A
0
A
0
0
1 1 0 0
instruction
1 0 1 1
1 0 0 1 0 0 0
1 0 1 0 0 0 0
instruction
opcode
instruction
instruction
opcode
opcode
opcode
WCR1
DR0
DR1
DR2
DR3
1
-P
1
-P
0
R
1
and R
0
R
1
addresses
DR/WCR
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and R
addresses
addresses
addresses
DR/WCR
R
0
R
0
WCR
WCR
1
-R
1
0
0
-R
0
1
-P
0
1
P
0
P
P
P
0
0
0
-P
0
Wiper Counter Register (WCR)
WP0-WP5 identify wiper position.
Data Registers (DR, R0-R3)
Wiper Position or User Data
(Nonvolatile)
0
0 0
0
0 0
0 0
0 0
(sent by X9430 on SO)
(sent by X9430 on SO)
(sent by host on SI)
(sent by Host on SI)
wiper position
W
P
5
0
W
W
W
P
P
5
5
P
5
Data Byte
Data Byte
Data Byte
W
P
4
W
W
W
P
P
P
4
4
4
WP5 WP4 WP3 WP2 WP1
W
P
3
W
W
W
P
P
3
3
P
3
W
P
2
Characteristics subject to change without notice.
W
W
W
(volatile)
P
P
P
2
2
2
W
P
1
W
W
W
P
P
1
1
P
1
W
P
0
W
W
W
P
P
P
0
0
0
Rising
Edge
Rising
Rising
Rising
Edge
Edge
CS
Edge
CS
CS
CS
HIGH-VOLTAGE
WRITE CYCLE
(LSB)
WP0
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