參數資料
型號: LICAL-ENC-MS001
廠商: Linx Technologies Inc
文件頁數: 10/24頁
文件大?。?/td> 0K
描述: IC ENCODER MS SERIES 20-SSOP
標準包裝: 1,600
系列: MS
類型: 數據編碼器
應用: 警報系統(tǒng),通信系統(tǒng)
電壓 - 電源,模擬: 2.0 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 20-SSOP(0.209",5.30mm 寬)
供應商設備封裝: 20-SSOP
包裝: 管件
14
Application Example
The MS encoder is ideal for registering button presses in remote control
applications. An example application circuit is shown in the figure below.
In this circuit, SPDT switches are used to select the baud rate so that
pull-down resistors are not needed. The data lines are connected to
buttons and when any button is pressed, the SEND line is pulled high and
causes the encoder to transmit. The diodes are used to prevent the voltage
on one data line from appearing on another data line.
If only one data line is needed, then it can be tied directly to the SEND line
without the need for the diodes.
None of the inputs have pull-up or pull-down resistors internally, so 100k
Ω
pulldown resistors are used on the data lines, SEND, and CREATE_ADDR.
These resistors are used to pull the lines to ground when the buttons are
not being pressed and ensure that they are always in a known state and
not floating. Without these resistors, the state of the lines could not be
guaranteed and encoder operation may not be predictable.
A LED indicator is attached to the MODE_IND line to provide visual
feedback to the user that an operation is taking place. This line will
source a maximum of 25mA, so the limiting resistor may not be needed,
depending on the LED chosen and the brightness desired.
Outgoing encoded data will be sent out of the DATA_OUT line at the
baud rate determined by the state of the SEL_BAUD lines. This line can
be connected directly to the DATA_IN line of a Linx transmitter, used to
modulate an infrared diode, or connected to any other serial transmission
medium.
To Transmitter
100k
220
100k
LICAL-ENC-MS001
D6
D7
SEL_BAUD0
SEL_BAUD1
GND
TX_CNTL
DATA_OUT
MODE_IND
D5
D4
D3
D2
VCC
D1
D0
SEND
CREATE_ADDR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
220
To Transmitter PDN
100k
Figure 13: MS Series Encoder Application Circuit
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