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PC87372 Datasheet(PDF) 139 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # PC87372
Description  LPC SuperI/O with Glue Functions
PDF  144 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87372 Datasheet(HTML) 139 Page - National Semiconductor (TI)

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10.0 Device Characteristics (Continued)
139
www.national.com
Revision 1.2
10.4.7 Serial Port 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 reg-
isters.
tBTN +25
2
ns
Receiver
tBTN − 2%
2
tBTN +2%
2
ns
Symbol
Parameter
Min
Max
Unit
tL
RI Low Time1,2
1. Not tested. Guaranteed by characterization.
2. The value also applies to RI wake-up detection in the SWC module
10
ns
tH
RI High Time1,2
10
ns
tSIM
Delay to Set IRQ from Modem Input
40
ns
tBT
SIN, SOUT
CTS, DSR, DCD
INTERRUPT
(Read MSR)
RI
tSIM
tSIM
tSIM
tH
tL
(Read MSR)



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