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M24LR04E-R 数据表(PDF) 55 Page - STMicroelectronics |
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M24LR04E-R 数据表(HTML) 55 Page - STMicroelectronics |
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55 / 142 page ![]() M24LR04E-R Bit representation and coding Doc ID 022208 Rev 5 55/142 11.2 Bit coding using two subcarriers 11.2.1 High data rate A logic 0 starts with eight pulses at 423.75 kHz (fC/32) followed by nine pulses at 484.28 kHz (fC/28), as shown in Figure 31. Bit coding using two subcarriers is not supported for the Fast commands. Figure 31. Logic 0, high data rate A logic 1 starts with nine pulses at 484.28 kHz (fC/28) followed by eight pulses at 423.75 kHz (fC/32), as shown in Figure 32. Bit coding using two subcarriers is not supported for the Fast commands. Figure 32. Logic 1, high data rate 11.2.2 Low data rate A logic 0 starts with 32 pulses at 423.75 kHz (fC/32) followed by 36 pulses at 484.28 kHz (fC/28), as shown in Figure 33. Bit coding using two subcarriers is not supported for the Fast commands. Figure 33. Logic 0, low data rate A logic 1 starts with 36 pulses at 484.28 kHz (fC/28) followed by 32 pulses at 423.75 kHz (fC/32) as shown in Figure 34. Bit coding using two subcarriers is not supported for the Fast commands. Figure 34. Logic 1, low data rate 37.46µs ai12074 37.46µs ai12073 149.84µs ai12072 149.84µs ai12075 |
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