參數(shù)資料
型號: S1C621A0F0A0100
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 118/161頁
文件大?。?/td> 1037K
代理商: S1C621A0F0A0100
S1C621A0 TECHNICAL HARDWARE
EPSON
I-35
CHAPTER 3: PERIPHERAL CIRCUITS (Remote LED Control)
3.9 Remote LED Control (R33, REM)
The S1C621A0 has an REM output pin which drives remote-
controlled LEDs. The pin provides a low-level output while
the REM output is off. (See Figure 3.9.1.)
In the infrared remote control generally used with household
equipment, the transmission code is modulated in PPM
process and the resulting signal is used for amplitude
modulation (AM) of a carrier of about 38 kHz before trans-
mission on infrared rays.
Fig. 3.9.1
Remote LED Control Circuit
Fig. 3.9.2
Remote-controlled
Transmission
Lower remote-control current consumption is ensured with
a carrier duty ratio less than 1/2.
S1C621A0
R33
REM
10
1
0101
Transmission
code
PPM
0
Carrier
AM
REM
output
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