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X9221A_14 Datasheet, PDF (8/15 Pages) Intersil Corporation – Dual Digitally Controlled Potentiometer
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X9221A
Figure 8. Detailed Potentiometer Block Diagram
Serial Data Path
From Interface
Circuitry
Register 0
8
Register 2
If WCR = 00[H] then VW/RW = VL/RL
If WCR = 3F[H] then VW/RW = VH/RH
Register 1
Serial
Bus
Input
6
Parallel
C
Bus
o
Input
u
n
Register 3
Wiper
Counter
t
e
r
Register
D
e
c
UP/DN
INC/DEC
Logic
UP/DN
o
d
e
Modified SCL
CLK
VH/RH
VL/RL
VW/RW
8
FN8163.2
August 30, 2006
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