SM5033A Datasheet, PDF (3/8 Pages) SamHop Microelectronics Corp. – IR DEODER

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SAMHOP Microelectronics Corp.
SM5033A/AL
IR DEODER
(2) IR/RF Receiving
A Schmitt circuit for shaping receiving signal waveform is built-in to eliminate rounding.
IR/RF RECEIVING
MODULE
RXIN
2
Figure 2
(3) Receiving Signal checking
The receiving signal is checked by means of storing the 1st frame of transmitting signal in
a 12-bit shift register and then, when the second frame data is put into the shift register,
1st frame data in the shift register is forced out by ont bit.
This bit is compared with the incoming bit to determine whether the receiving signal is
correct or not.
12 BITS
12 BITS
RECEIVING SIGNAL
FIRST DATA
Figure 3
SECOND DATA
(4) Custom Code
C1, C2 and C3 provide custom code setting. When coding of transmitter and receiver is
the same, internal latch strobe pulse is generated to latch received data and output is
effected.
Page 3
VER 1.0,NOV. 2000