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PC87303 Datasheet(PDF) 103 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # PC87303
Description  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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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87303 Datasheet(HTML) 103 Page - National Semiconductor (TI)

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100 Electrical Characteristics (Continued)
1026 Receiver Timing
Symbol
Parameter
Conditions
Min
Max
Units
tRAI
Delay from Active Edge of RD to Reset IRQ
78
ns
tRINT
Delay from Inactive Edge of RD (RD LSR) to Reset IRQ
55
ns
tSCD
Delay from RCLK to Sample Time
(Note 1)
41
ns
tSINT
Delay from Stop Bit to Set Interrupt
2
Baud Out
Cycle
Note 1
This is an internal timing specification and is therefore not tested
TLC12074 – 87
FIGURE 10-7 Sample Clock Timing
TLC12074 – 64
FIGURE 10-8 Receiver Timing
TLC12074 – 65
Note 1
If SCR0 e 1 then tSINT e 3 RCLKs For a Timeout Interrupt tSINT e 8 RCLKs
FIGURE 10-9 FIFO Mode Receiver Timing
103



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