M80C51FB Ver la hoja de datos (PDF) - Intel

Número de pieza

componentes Descripción

Fabricante

M80C51FB

CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

Intel 

M80C51FB

All other pins disconnected

271172 – 8

Figure 7 ICC Load Circuit Power Down Mode

VCC e 2 0V to 5 5V

271172 – 9

Figure 8 Clock Signal Waveform for ICC Tests in Active and Idle Modes TCLCH e TCHCL e 5 ns

EXPLANATION OF THE AC SYMBOLS

Each timing symbol has 5 characters The first char-

acter is always a ‘T’ (stands for time) The other

characters depending on their positions stand for

the name of a signal or the logical status of that

signal The following is a list of all the characters and

what they stand for

A Address

C Clock

D Input Data

H Logic level HIGH

I Instruction (program memory contents)

L Logic level LOW or ALE

P PSEN

Q Output Data

R RD signal

T Time

V Valid

W WR signal

X No longer a valid logic level

Z Float

For example

TAVLL e Time from Address Valid to ALE Low

TLLPL e Time from ALE Low to PSEN Low

8

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