X9250TB24 XICOR [Xicor Inc.], X9250TB24 Datasheet - Page 7

• Manufacturer Part Number: X9250TB24
• Description: Quad Digitally Controlled Potentiometers (XDCP)
• Manufacturer: XICOR [Xicor Inc.]

X9250
Figure 8. Increment/Decrement Timing Limits
Table 1. Instruction Set
REV 1.1.5 1/31/03
Read Wiper Counter
Register
Write Wiper Counter
Register
Read Data Register
Write Data Register
XFR Data Register to
Wiper Counter Register
XFR Wiper Counter
Global XFR Data Register
to Wiper Counter Register
Global XFR Wiper Counter
Register to Data Register
Increment/Decrement
Wiper Counter Register
Read Status (WIP bit)
Register to Data Register
Instruction
V
W
/R
SCK
SI
W
INC/DEC CMD Issued
I
1
1
1
1
1
1
0
1
0
0
3
I
0
0
0
1
1
1
0
0
0
1
2
I
0
1
1
0
0
1
0
0
1
0
1
Instruction Set
I
1
0
1
0
1
0
1
0
0
1
0
Voltage Out
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R
R
R
R
R
R
R
0
0
0
0
1
1
1
1
1
1
1
R
R
R
R
R
R
R
0
0
0
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
0
0
0
1
1
1
1
1
1
1
1
P
P
P
P
P
P
P
P
0
0
1
0
0
0
0
0
0
0
0
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
Write new value to the Data Register pointed
to by P
Transfer the contents of the Data Register
pointed to by R
Register pointed to by P
Transfer the contents of the Wiper Counter
Register pointed to by P
pointed to by R
Transfer the contents of the Data Registers
pointed to by R
respective Wiper Counter Register
Transfer the contents of all Wiper Counter
Registers to their respective data Registers
pointed to by R
Enable Increment/decrement of the Wiper
Counter Register pointed to by P
Read the status of the internal write cycle,
by checking the WIP bit.
t
WRID
Characteristics subject to change without notice.
1
-P
0
and R
1
1
1
1
1
–R
Operation
-P
–R
–R
–R
1
0
0
–R
0
0
0
and R
of all four pots to their
of all four pots
to the Wiper Counter
0
1
1
-P
1
1
-P
-P
-P
1
0
0
–R
0
0
to the Register
0
1
-P
0
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