83C196KD データシートの表示（PDF） - Intel

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83C196KD

COMMERCIAL CHMOS MICROCONTROLLER

Intel 

8XC196KD 8XC196KD20

EXTERNAL CRYSTAL CONNECTIONS

EXTERNAL CLOCK CONNECTIONS

272145 – 13

NOTE

Keep oscillator components close to chip and use

short direct traces to XTAL1 XTAL2 and VSS When

using ceramic crystals C1 e 20 pF C2 e 20 pF

When using ceramic resonators consult manufacturer

for recommended capacitor values

NOTE

Required if TTL driver used

Not needed if CMOS driver is used

272145 – 14

AC TESTING INPUT OUTPUT WAVEFORMS

FLOAT WAVEFORMS

272145 – 11

AC Testing inputs are driven at 2 4V for a Logic ‘‘1’’ and 0 45V for

a Logic ‘‘0’’ Timing measurements are made at 2 0V for a Logic

‘‘1’’ and 0 8V for a Logic ‘‘0’’

272145 – 12

For Timing Purposes a Port Pin is no Longer Floating when a

150 mV change from Load Voltage Occurs and Begins to Float

when a 150 mV change from the Loaded VOH VOL Level occurs

IOL IOH e g15 mA

EXPLANATION OF AC SYMBOLS

Each symbol is two pairs of letters prefixed by ‘‘T’’ for time The characters in a pair indicate a signal and its

condition respectively Symbols represent the time between the two signal condition points

Conditions

H High

L Low

V Valid

X No Longer Valid

Z Floating

Signals

A Address

B BHE

C CLKOUT

D DATA

G Buswidth

H HOLD

HA HLDA

L ALE ADV

BR BREQ

R RD

W WR WRH WRL

X XTAL1

Y READY

Q Data Out

18

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