Intel 8XC251SA Manual do Utilizador descarregar pdf (Página 32)

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32 PRELIMINARY

8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER

Figure 18. External Clock Drive Waveforms

Figure 19. AC Testing Input, Output Waveforms

Figure 20. Float Waveforms

0.7 V



A4119-01

0.45 V

– 0.5

0.2 V

– 0.1

CHCL

CLCX

CLCL

CLCH

CHCX

AC inputs during testing are driven at V

– 0.5V for a logic 1

and 0.45 V for a logic 0. Timing measurements are made at 



0.45 V

Inputs

Outputs

A4118-01

MIN

MAX

– 0.5

0.2 V

+ 0.9

0.2 V

– 0.1

a min of V

for a logic 1 and V

for a logic 0.

LOAD

+ 0.1 V

LOAD

– 0.1 V

Timing Reference

Points

LOAD

– 0.1 V

+ 0.1 V

For timing purposes, a port pin is no longer floating when a 

100 mV change from load voltage occurs and begins to float

when a 100 mV change from the loading V

level occurs 

with I

± 20 mA.

A4117-01

1 2 ... 27 28 29 30 31 32 33 34 35 36

8XC251SA/SB/SP/SQ 1
HIGH-PERFORMANCE 1
CHMOS MICROCONTROLLER 1
PRELIMINARY 3 3
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PRELIMINARY 10
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A4212-03 26
PRELIMINARY 27 27
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Packaging 33
Handbook 33
PRELIMINARY 35 35

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