X9251-2.7 INTERSIL [Intersil Corporation], X9251-2.7 Datasheet - Page 7

• Manufacturer Part Number: X9251-2.7
• Description: Single Supply/Low Power/256-Tap/SPI Bus
• Manufacturer: INTERSIL [Intersil Corporation]

Data Register Selection
#: 0, 1, 2, or 3
Table 5. Instruction Set
Note:
Read Wiper Counter
Register
Write Wiper Counter
Register
Read Data Register
Write Data Register
XFR Data Register to
Wiper Counter Register
XFR Wiper Counter
Register to Data Register
Global XFR Data Registers
to Wiper Counter Registers
Global XFR Wiper Counter
Registers to Data Register
Increment/Decrement
Wiper Counter Register
Register
DR#0
DR#1
DR#2
DR#3
1/0 = data is one or zero
Instruction
RB
0
0
1
1
7
I3
1
1
1
1
1
1
0
1
0
RA
0
1
0
1
I2
0
0
0
1
1
1
0
0
0
I1
0
1
1
0
0
1
0
0
1
Instruction Set
I0
1
0
1
0
1
0
1
0
0
RB RA
1/0
1/0
1/0
1/0
1/0
1/0
0
0
0
X9251
1/0
1/0
1/0
1/0
1/0
1/0
0
0
0
1/0
1/0
1/0
1/0
1/0
1/0
1/0
P1
0
0
1/0
1/0
1/0
1/0
1/0
1/0
1/0
P0
0
0
Read the contents of the Wiper Counter
Register pointed to by P1 - P0
Write new value to the Wiper Counter
Register pointed to by P1 - P0
Read the contents of the Data Register
pointed to by P1 - P0 and RB - RA
Write new value to the Data Register
pointed to by P1 - P0 and RB - RA
Transfer the contents of the Data Register
pointed to by P1 - P0 and RB - RA to its
associated Wiper Counter Register
Transfer the contents of the Wiper Counter
Register pointed to by P1 - P0 to the Data
Register pointed to by RB - RA
Transfer the contents of the Data Registers
pointed to by RB - RA of all four pots to their
respective Wiper Counter Registers
Transfer the contents of both Wiper Counter
Registers to their respective data Registers
pointed to by RB - RA of all four pots
Enable Increment/decrement of the Control
Latch pointed to by P1 - P0
Operation
September 14, 2005
FN8166.2