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PC87413 датащи(PDF) 252 Page - National Semiconductor (TI) |
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PC87413 датащи(HTML) 252 Page - National Semiconductor (TI) |
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252 / 257 page ![]() 11.0 Device Characteristics (Continued) www.national.com 252 Revision1.2 11.5.9 Serial Ports 1 and 2 Timing Serial Port Data Timing Modem Control Timing Symbol Parameter Conditions Min Max Unit tBT Single Bit Time in Serial Port1 1. Not tested. Guaranteed by design. Transmitter tBTN − 25 2 2. tBTN is the nominal bit time in the Serial Port; it is determined by the setting of the Baud Generator Divisor registers. tBTN +25 2 ns Receiver tBTN − 2% 2 tBTN +2% 2 ns Symbol Parameter Min Max Unit tL RI2,1 Low Time1,2 1. Not tested. Guaranteed by characterization 2. This value also applies to RI2,1 wake-up detection in the SWC module. 10 ns tH RI2,1 High Time1,2 10 ns tSIM Delay to Set IRQ from Modem Input 40 ns tBT SIN1, SIN2 SOUT1, SOUT2 CTS, DSR, DCD INTERRUPT (Read MSR) RI tSIM tSIM tSIM tH tL (Read MSR) |
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