82C88 データシートの表示（PDF） - Intersil

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82C88

CMOS Bus Controller

Intersil 

Timing Waveforms (Note 3) (Continued)

CEN

82C88

AEN

DEN

PDEN

TAEVNV (22)

TCEVNV (23)

FIGURE 2. DEN, PDEN QUALIFICATION TIMING

AEN

1.5V

TAELCV

(21)

1.5V

OUTPUT

COMMAND

TAELCH (19)

VOH

TAEHCZ (20)

0.5V VOH

CEN

TCELRH

(24)

TCELRH (24)

CEN MUST BE LOW OR INVALID PRIOR TO T2 TO PREVENT THE COMMAND FROM BEING GENERATED.

FIGURE 3. ADDRESS ENABLE (AEN) TIMING (THREE-STATE ENABLE/DISABLE)

NOTES:

1. Address/Data Bus is shown only for reference purposes.

2. Leading edge of ALE and MCE is determined by the falling edge of CLK or status going active. Whichever occurs last.

3. All timing measurements are made at 1.5V unless otherwise specified.

9

FN2979.2

August 25, 2005

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