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NS486SXF Datasheet(PDF) 39 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # NS486SXF
Description  NS486TMSXF Optimized 32-Bit 486-Class Controller with On-Chip Peripherals for Embedded Systems
PDF  44 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

NS486SXF Datasheet(HTML) 39 Page - National Semiconductor (TI)

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30 Device Specifications (Continued)
Symbol
Parameter
Min
Max
Units
tSINT
Delay from Stop Bit to Set Interrupt
2
BAUDOUT Cycles
tSTI
Delay from Start Bit to IRQ
8
BAUDOUT Cycles
tSI
Delay from Initial Write to IRQ
16
24
BAUDOUT Cycles
tIRS
Delay from IRQ Reset to Tx Start
8
24
BAUDOUT Cycles
tMDO
Delay from Write to Output
40
ns
tRIM
Delay to Reset IRQA from Read
78
ns
tSIM
Delay to Set IRQ from Modem Input
40
ns
BAUDOUT Cycle e
Input Clock Frequency
16 x Baudrate Divisor
Input Clock Frequency e
OSCX1 Frequency
UART Clock Divisor
Registers Divisor Latch Holds Baudrate Divisor
EF70 holds UART Clock Divisor
TLEE12514 – 28
TLEE12514 – 29
FIGURE 3-18 UART IRQ Timing
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