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T48C862x-Rf-TNQ датащи(PDF) 80 Page - ATMEL Corporation |
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T48C862x-Rf-TNQ датащи(HTML) 80 Page - ATMEL Corporation |
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80 / 107 page ![]() 80 T48C862-R4 [Preliminary] 4551C–4BMCU–01/04 Combination Mode 3: Manchester Modulation 1 SSI mode 1: 8-bit shift register internal data output (SO) to the Timer 2 modulator stage Timer 2 mode 1, 2, 3 or 4: 8-bit compare counter with 4-bit programmable prescaler Timer 2 output mode 5: The modulator 2 of Timer 2 modulates the SSI internal data output to Manchester code Figure 76. Manchester Modulation 1 Combination Mode 4: Manchester Modulation 2 SSI mode 1: 8-bit shift register internal data output (SO) to the Timer 2 modulator stage Timer 2 mode 3: 8-bit compare counter and 4-bit prescaler Timer 2 output mode 5: The modulator 2 of Timer 2 modulates the SSI data output to Manchester code The 4-bit stage can be used as prescaler for the SSI to generate the stop signal for mod- ulator 2. The SSI has a special mode to supply the prescaler with the shift clock. The control output signal (OMSK) of the SSI is used as stop signal for the modulator. Figure 77 on page 80 shows an example for a 12-bit Manchester telegram. Figure 77. Manchester Modulation 2 TOG2 SC SO T2O 00 0 0 0 11 01 01 11 1 1 8-bit SR-data Bit 7 Bit 0 0 Bit 7 Bit 0 Data: 00110101 00 0 000 0 0 12 3 4 012 0 Counter 2/1 = Compare Register 2/1 (= 4) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 SCLI Buffer full SIR SO SC MSM Timer 2 Mode 3 SCL Counter 2/1 OMSK T2O 3 |
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