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SC50462 Datasheet(PDF) 3 Page - List of Unclassifed Manufacturers |
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SC50462 Datasheet(HTML) 3 Page - List of Unclassifed Manufacturers |
3 / 12 page Silan Semiconductors SC50462 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.1 2002-02-28 3 PIN DESCRIPTION Pin No. Pin Name Input/output Description 1,24 Vss,Vcc Power Power Supply: Vcc=3.0V,Vss=0V 2,3 OSCI,OSCO I/O Oscillator Input/Output Pin, 455 or 480kHz Crystal is connected between these pins. 4 CNTR O Transmitting Indicator. An LED and resistor are connected from this pintoVcc. 5~12 S1~S8 O Key Scan Signal Output pins. 13~20 I1~I8 I Key Scan Signal Input pins. 21,22 C4 C5 , I Custom Code 23 OUT O Modulation Pin FUNCTIONAL DESCRIPTION SC50462 is a sending signal IC on infrared remote control. Consisting of timing generating circuit, scan signal generating circuit, key input encoder, instruction decoder, custom code circuit, code encoder, and output buffer. It has 8*8 key matrix input and custom code with 16 bit PCM which shows 76 instructions.76Instruction are devided in 64 one shot signal and 12 2-shot signal. When Input Signal(I1~I8) and/or in combination with the Scan Signals(S1~S8) are activated, SC50462 checks the ID and the Custom Code Bits-- 4 C and 5 C --setting before finally sending out the remote control signal. 1. CNTR OUTPUT The CNTR Pin is the LED transmission Indicator. This means that Whenever a valid transmission is sent, the LED lights up. The CNTR output becomes “L” in the 7 th pulse-rising and “H” in the 17th pulse-rising. C0 C1 C2 C3 C4 C5 C7 D0 D1 D2 D3 D4 D5 D6 D7 C6 7th 17th One Word OUT CNTR Next Frame 44ms or 46.4ms Note: Oscillator Frequency=480 or 455kHz |
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