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PC87303 датащи(PDF) 102 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали PC87303
подробное описание детали  PC87303VUL SuperI/OTM Sidewinder Lite Floppy Disk Controller, Keyboard Controller, Real-Time Clock, Dual UARTs, IEEE 1284 Parallel Port, and IDE Inter
PDF  114 Pages
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87303 датащи(HTML) 102 Page - National Semiconductor (TI)

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100 Electrical Characteristics (Continued)
1024 Baud Out Timing
Symbol
Parameter
Conditions
Min
Max
Units
N
Baud Divisor
1
65535
ns
tBHD
Baud Output Positive Edge Delay
CLK e 24 MHz2 100 pF Load
56
ns
tBLD
Baud Output Negative Edge Delay
CLK e 24 MHz2 100 pF Load
56
ns
TLC12074 – 62
FIGURE 10-5 Baud Out Timing
1025 Transmitter Timing
Symbol
Parameter
Min
Max
Units
tHR
Delay from WR (WR THR) to Reset IRQ
40
ns
tIR
Delay from RD (RD IIR) to Reset IRQ (THRE)
55
ns
tIRS
Delay from Initial IRQ Reset to Transmit Start
8
24
Baud Out Cycles
tSI
Delay from Initial Write to IRQ
16
24
Baud Out Cycles
tSTI
Delay from Start Bit to IRQ (THRE)
8
Baud Out Cycles
TLC12074 – 63
Note 1
See Microprocessor Write cycle timing
Figure 10-3
Note 2
See Microprocessor Read cycle timing
Figure 10-2
FIGURE 10-6 Transmitter Timing
102



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