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參數(shù)資料
| 型號： | X9269 |
| 廠商： | Intersil Corporation |
| 英文描述： | 3A,400V,SILASTIC RECT. |
| 中文描述： | 單電源/低Power/256-Tap/2-Wire巴士 |
| 文件頁數(shù)： | 5/25頁 |
| 文件大?。?/td> | 422K |
| 代理商： | X9269 |
X9269
REV 1.1.11 2/17/03
Characteristics subject to change without notice.
5 of 25
www.xicor.com
PRINCIPLES OF OPERATION
The X9269 is a integrated microcircuit incorporating
four resistor arrays and their associated registers and
counters and the serial interface logic providing direct
communication between the host and the digitally
controlled potentiometers. This section provides detail
description of the following:
– Resistor Array Description
– Serial Interface Description
– Instruction and Register Description.
Array Description
The X9269 is comprised of a resistor array (see Figure
1). Each array contains 255 discrete resistive
segments that are connected in series. The physical
ends of each array are equivalent to the fixed terminals
of a mechanical potentiometer (R
H
and R
L
inputs).
At both ends of each array and between each resistor
segment is a CMOS switch connected to the wiper
(R
W
) output. Within each individual array only one
switch may be turned on at a time.
These switches are controlled by a Wiper Counter
Register (WCR). The 8-bits of the WCR (WCR[7:0])
are decoded to select, and enable, one of 256 switches
(see Table 1).
The WCR may be written directly. These Data
Registers can the WCR can be read and written by the
host system.
Power Up and Down Requirements.
There are no restrictions on the power-up or power-
down conditions of V
CC
and the voltages applied to the
potentiometer pins provided that V
CC
is always more
positive than or equal to V
H
, V
L
, and V
W
, i.e., V
CC
V
H
,
V
L
, V
W
. The V
CC
ramp rate specification is always in
effect.
Figure 1. Detailed Potentiometer Block Diagram
SERIAL DATA PATH
FROM INTERFACE
CIRCUITRY
REGISTER 0
(DR0)
REGISTER 1
(DR1)
REGISTER 2
(DR2)
REGISTER 3
(DR3)
SERIAL
BUS
INPUT
PARALLEL
BUS
INPUT
COUNTER
REGISTER
(WCR)
INC/DEC
LOGIC
UP/DN
CLK
MODIFIED SCL
UP/DN
R
H
R
L
R
W
8
8
C
O
U
N
T
E
R
D
E
C
O
D
E
IF WCR = 00[H] THEN R
W
= R
L
IF
WCR = FF[H]
THEN
R
W
=
R
H
WIPER
One of Two Potentiometers
相關PDF資料 |
PDF描述 |
|---|---|
| X9269TS24I | Single Supply/Low Power/256-Tap/2-Wire Bus |
| X9269TS24I-2.7 | Single Supply/Low Power/256-Tap/2-Wire Bus |
| X9269TV24-2.7 | Single Supply/Low Power/256-Tap/2-Wire Bus |
| X9269TV24I | Single Supply/Low Power/256-Tap/2-Wire Bus |
| X9269US24 | Single Supply/Low Power/256-Tap/2-Wire Bus |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| X9269_07 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual Digitally-Controlled Potentiometers |
| X9269TB16 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Dual Digitally-Controlled Potentiometers |
| X9269TB16-2.7 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Dual Digitally-Controlled Potentiometers |
| X9269TB16I | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Dual Digitally-Controlled Potentiometers |
| X9269TB16I-2.7 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Dual Digitally-Controlled Potentiometers |
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