SM5021 Просмотр технического описания (PDF) - Samhop Mircroelectronics

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SM5021

Encoder. For SM3015 fan remote control, audio remote control, toy remote control, consumer products remote control

Samhop Mircroelectronics 

三合微科股份有限公司

SAMHOP Microelectronics Corp.

SM5021

ENCODER

C. Transmission Timing

Key In

t1

OSC

LED

t2

DOUT

Frame 1

t3

t4

Frame 2

Frame 3

Frame 4

* t1: Key pressing > 32ms

* t2: Transmission time t3 + 108ms ( Four frame )

If t1 is over t3 + 108ms, DOUT will be transmitted again.

[ ( Pressing time ) MOD ( t3 + 108ms ) + 1 ] * 108ms + t3

* t3: Oscillator stable time. OSC * 384 = 0.8ms

* t4: 3-Bits( Head ) + 2-Bits( Custom Code ) + 7-Bits( Data ) + 6-Bits( Empty ) = 18-Bits (27ms)

* OSC: 455KHz resonator

Page 4

V.2.0 Mar 8,2002

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