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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MB89R112 датащи(PDF) 8 Page - RAMXEED LIMITED |
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MB89R112 датащи(HTML) 8 Page - RAMXEED LIMITED |
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8 / 49 page  MB89R112 8 DS411-00004-3v0-E (2) Data rate and data coding The MB89R112 supports only 1 out of 4 mode for bit coding, not 1 out of 256 mode. In 1 out of 4 mode, 2- bit signals are coded in a period of 75.52 s as shown in the following. When coding takes place, the data rate is 26.48 kbps (fc/512). Each signal is transmitted beginning with the lowest bit. (3) Data frame A data frame begins with a start of frame (SOF) signal and ends with an end of frame (EOF) signal. The MB89R112 is enabled to receive a frame from a reader/writer within 300 s after the MB89R112 has sent a frame to the reader/writer. The MB89R112 is also enabled to receive a frame from a reader/writer within 1 ms after power has been supplied to the MB89R112. 9.44 μs 9.44 μs 9.44 μs 9.44 μs 9.44 μs 75.52 μs 75.52 μs 75.52 μs 75.52 μs 28.32 μs 47.20 μs 66.08 μs “00B” pulse position “01B” pulse position (1 LSB) “10B” pulse position (0 LSB) “11B” pulse position Coding Method in 1 out of 4 Mode SOF 9.44 μs 9.44 μs 9.44 μs 37.76 μs 37.76 μs 37.76 μs 9.44 μs 9.44 μs EOF Waveforms of SOF and EOF signals of a frame sent from a reader/writer |
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