X9258_11 INTERSIL [Intersil Corporation], X9258_11 Datasheet - Page 6

• Manufacturer Part Number: X9258_11
• Manufacturer: INTERSIL [Intersil Corporation]

The Increment/Decrement command is different from the
other commands. Once the command is issued and the
X9258 has responded with an acknowledge, the master can
clock the selected wiper up and/or down in one segment
steps; thereby, providing a fine tuning capability to the host.
For each SCL clock pulse (t
selected wiper will move one resistor segment towards the
V
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
1. 1/0 = data is one or zero.
H
terminal.
INSTRUCTION
HIGH
6
I
1
1
1
1
1
1
0
1
0
3
) while SDA is HIGH, the
I
0
0
1
1
0
0
0
0
1
2
I
0
1
1
0
0
1
0
0
1
1
INSTRUCTION SET
I
1
0
1
0
1
0
1
0
0
0
TABLE 1. INSTRUCTION SET
1/0
1/0
1/0
1/0
1/0
1/0
R
0
0
0
1
1/0
1/0
1/0
1/0
1/0
1/0
R
0
0
0
0
X9258
1/0
1/0
1/0
1/0
1/0
1/0
1/0
P
0
0
1
Similarly, for each SCL clock pulse while SDA is LOW, the
selected wiper will move one resistor segment towards the
V
timing for this operation are shown in Figures 5 and 6
respectively.
L
1/0
1/0
1/0
1/0
1/0
1/0
1/0
P
/R
0
0
0
L
terminal. A detailed illustration of the sequence and
Read the contents of the Wiper Counter Register 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
and R
Write new value to the Data Register pointed to by P
and R
Transfer the contents of the Data Register pointed to by
P
Transfer the contents of the Wiper Counter Register pointed
to by P
Transfer the contents of the Data Registers pointed to by
R
Counter Registers
Transfer the contents of both Wiper Counter Registers to
their respective data Registers pointed to by R
four potentiometers
Enable Increment/decrement of the Control Latch pointed to
by P
1
1
1
- P
- P
- R
1
1
0
1
1
0
- P
- P
0
1
- R
- R
and R
of all four potentiometers to their respective Wiper
- P
0
0
0
0
0
to the Data Register pointed to by R
1
- R
0
to its associated Wiper Counter Register
OPERATION
1
- R
April 14, 2011
1
- R
0
FN8168.5
1
of all
1
0
- P
- P
0
0