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SC5262S-IR Datasheet(PDF) 4 Page - Silan Microelectronics Joint-stock |
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SC5262S-IR Datasheet(HTML) 4 Page - Silan Microelectronics Joint-stock |
4 / 10 page Silan Semiconductors SC5262 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 4 Code word A group of Code Bits is called a Code Word. A Code Word consists of 12 AD bits followed by one Sync. Bit. The 12 AD bits are determined by the corresponding states of A0~A5 and A6/D5 ~ A11/D0 pins at the time of transmission. When Data Type of SC5262 is used , the address bits will decrease accordingly. For example, in the 3 Data Type where the address has 9 bits, the transmitting format is: 9 address bits 3 Data bits Sync. Bit SC5262/SC5272 has a maximum of 12 Address Bits including the 6 Address/Data bits. The following diagram shows the code bits with their corresponding pins. A0 A1 A2 A3 A4 A5 A6 /D5 A7 /D4 A8 /D3 A9 /D2 A10 /D1 A11 /D0 0 Data A0A1 A2 A3 A4A5A6A7A8A9 A10 A11 Sync 1 Data A0A1 A2 A3 A4A5A6A7A8A9 A10 D0 Sync 2 Data A0A1 A2 A3 A4A5A6A7A8A9 D1 D0 Sync 3 Data A0A1 A2 A3 A4A5A6A7A8D2 D1 D0 Sync 4 Data A0A1 A2 A3 A4A5A6A7D3 D2 D1 D0 Sync 5 Data A0A1 A2 A3 A4A5A6D4 D3 D2 D1 D0 Sync 6 Data A0A1 A2 A3 A4A5D5 D4 D3 D2 D1 D0 Sync The Code Bits A0~A5 and A6/D5 ~ A11/D0 are determined by the states of A0 ~ A5 and A6/D5 ~A11/D0 pins. For example, when the A0(pin 1) is set to “ 1 ”(Vcc), the code bit A0 is synthesized as “ 1 ” bit. In the same manner, when it (A0 pin) is set to “ 0 ”( Vss) or left floating, the Code Bit A0 is synthesized as a “ 0 ” or “ f ” bit respectively. Code Frame A Code Frame consists of 4 continuous code Words. When SC5262 detects “0” on the TE (meaning , the TE is active “low”), it outputs a Code frame at Dout. If TE is still active at the time the Code Frame transmission ends. SC5262 outputs another Code Frame. It should be noted that the Code Frame is synthesized at the time of transmission. TE Dout 1 frame(=4 word) 1frame 1frame Single Resistor Oscillator The Build-in oscillator circuitry of SC5262 allows a precision oscillator to be constructed by connecting an external resistor between OSC1 and OSC2 pins. For SC5272 to decode correctly the received waveform, the oscillator frequency of SC5272 must be 2.5 ~8 times that of transmitting SC5262. The typical oscillator frequency with various resistor values for both SC5262 and SC5272 are shown below: |
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