X9258 Xicor, X9258 Datasheet - Page 6

• Manufacturer Part Number: X9258
• Description: Quad Digital Controlled Potentiometers (XDCP)
• Manufacturer: Xicor

X9258
Table 1. Instruction Set
Note: (1) 1/0 = data is one or zero
Figure 4. Three-Byte Instruction Sequence
REV 1.1.7 2/4/03
SCL
SDA
Read Wiper Counter
Register
Write Wiper Counter
Register
Read Data Register
Write Data Register
XFR Data Register to
Wiper Counter Regis-
ter
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 Regis-
ter
Instruction
S
T
A
R
T
0
1
0
1
A3 A2 A1 A0 A
I
1
1
1
1
1
1
0
1
0
3
I
0
0
0
1
1
1
0
0
0
2
I
0
1
1
0
0
1
0
0
1
1
Instruction Set
C
K
I
1
0
1
0
1
0
1
0
0
0
I3
1/0
1/0
1/0
1/0
1/0
1/0
R
0
0
0
1
I2
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1/0
1/0
1/0
1/0
1/0
1/0
R
0
0
0
I1 I0
0
1/0
1/0
1/0
1/0
1/0
1/0
1/0
P
0
0
1
R1 R0 P1 P0 A
1/0
1/0
1/0
1/0
1/0
1/0
1/0
P
0
0
0
Read the contents of the Wiper Counter Regis-
ter pointed to by P
Write new value to the Wiper Counter Register
pointed to by P
Read the contents of the Data Register pointed
to by P
Write new value to the Data Register pointed to
by P
Transfer the contents of the Data Register point-
ed to by P
er Counter Register
Transfer the contents of the Wiper Counter Reg-
ister pointed to by P
pointed to by R
Transfer the contents of the Data Registers
pointed to by R
spective Wiper Counter Registers
Transfer the contents of both Wiper Counter
Registers to their respective data Registers
pointed to by R
Enable Increment/decrement of the Control
Latch pointed to by P
1
–P
C
K
1
–P
0
1
D7 D6 D5 D4 D3 D2 D1 D0
and R
Characteristics subject to change without notice.
0
–P
and R
0
1
and R
1
1
1
1
–P
–R
–R
–R
–R
Operation
1
1
0
0
0
0
–P
–R
1
0
of all four pots
of all four pots to their re-
–P
1
1
0
–P
–R
0
0
0
0
to the Data Register
to its associated Wip-
A
C
K
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S
T
O
P