X9409 Xicor, X9409 Datasheet - Page 7

• Manufacturer Part Number: X9409
• Description: Quad Digitally Controlled Potentiometers
• Manufacturer: Xicor

X9409 – Preliminary Information
Figure 7. Acknowledge Response from Receiver
Figure 8. Detailed Potentiometer Block Diagram
REV 1.6 1/30/03
If WCR = 00[H] then V
If WCR = 3F[H] then V
Serial Data Path
From Interface
Circuitry
from Transmitter
from Receiver
Data Output
Data Output
SCL from
Master
W
W
/R
/R
W
W
= V
= V
START
Register 0
Register 2
L
H
/R
/R
L
H
8
1
Register 1
Register 3
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Modified SCL
UP/DN
6
Parallel
Bus
Input
UP/DN
CLK
Serial
Bus
Input
Register
Counter
INC/DEC
(WCR)
Wiper
Logic
8
Characteristics subject to change without notice.
C
o
u
n
e
D
e
o
d
e
t
r
c
Acknowledge
9
V
V
V
H
L
W
/R
7 of 21
/R
/R
H
L
W