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參數(shù)資料
| 型號(hào)： | X9511WSZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | Single Digitally-Controlled (XDCP) Potentiometer (Push Button Controlled) |
| 中文描述： | 10K DIGITAL POTENTIOMETER, PUSH-BUTTON CONTROL INTERFACE, 32 POSITIONS, PDSO8 |
| 封裝： | ROHS COMPLIANT, PLASTIC, SOIC-8 |
| 文件頁(yè)數(shù)： | 3/10頁(yè) |
| 文件大?。?/td> | 56K |
| 代理商： | X9511WSZ |
X9511
3
DEVICE OPERATION
There are three sections of the X9511: the input control,
counter and decode section; the E
the resistor array. The input control section operates just
like an up/down counter. The output of this counter is
decoded to turn on a single electronic switch connecting
a point on the resistor array to the wiper output. Under
the proper conditions the contents of the counter can be
stored in E
PROM memory and retained for future use.
The resistor array is comprised of 31 individual resistors
connected in series. At either end of the array and
between each resistor is an electronic switch that trans-
fers the potential at that point to the wiper.
2
PROM memory; and
2
The X9511 is designed to interface directly to two push
button switches for effectively moving the wiper up or
down. The PU and PD inputs increment or decrement a
5-bit counter respectively. The output of this counter is
decoded to select one of the thirty-two wiper positions
along the resistive array. The wiper increment input, PU
and the wiper decrement input, PD are both connected
to an internal pull-up so that they normally remain HIGH.
When pulled LOW by an external push button switch or a
logic LOW level input, the wiper will be switched to the
next adjacent tap position.
Internal debounce circuitry prevents inadvertent switch-
ing of the wiper position if PU or PD remain LOW for less
than 40ms, typical. Each of the buttons can be pushed
either once for a single increment/decrement or continu-
ously for a multiple increments/decrements. The number
of increments/decrements of the wiper position depend
on how long the button is being pushed. When making a
continuous push, after the first second, the increment/
decrement speed increases. For the first second the
device will be in the slow scan mode. Then if the button is
held for longer than 1 second the device will go into the
fast scan mode. As soon as the button is released the
X9511 will return to a standby condition.
The wiper, when at either fixed terminal, acts like its
mechanical equivalent and does not move beyond the
last position. That is, the counter does not wrap around
when clocked to either extreme.
AUTOSTORE
The value of the counter is stored in E
whenever the chip senses a power-down of V
ASE is enabled (held LOW). When power is restored, the
content of the memory is recalled and the counter reset
to the last value stored.
2
PROM memory
CC
while
If AUTOSTORE is to be implemented, ASE is typically
hard wired to V
SS
. If ASE is held HIGH during power-up
and then taken LOW, the wiper will not respond to the PU
or PD inputs until ASE is brought HIGH and held HIGH.
Manual (Push Button) Store
When ASE is not enabled (held HIGH) a push button
switch may be used to pull ASE LOW and released to
perform a manual store of the wiper position.
R
The end to end resistance of the array will fluctuate once
V
CC
is removed.
TOTAL
with V
CC
Removed
Typical circuit with ASE store pin controlled by
push button switch
V
CC
PU
PD
ASE
VH
VW
VL
V
SS
8
1
2
7
3
5
6
3067 ILL F05a
V
CC
Typical circuit with ASE store pin used in
AUTOSTORE mode
V
CC
V
CC
PU
PD
ASE
V
SS
VH
VW
VL
3.3μF
8
1
2
7
4
3
5
6
3067 ILL F05.2
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