GMS90C320PL40 datasheet(32/46 Pages) HYNIX

32 / 46 page

GMS90C320

OCT. 2000 Ver 1.2

AC Characteristics for 16MHz version

External Program Memory Characteristics

VCC=5V:

VCC=5V + 10%, −15%; VSS=0V; TA=0°Cto 70°C

(CL for port 0. ALE and PSEN outputs = 100pF; CL for all other outputs = 80pF)

VCC=3.3V:

VCC=3.3V + 0.3V, −0.6V; VSS=0V; TA=0°Cto 70°C

(CL for port0.ALE and PSEN outputs = 50pF; CL for all other outputs = 50pF)

Variable clock:

Vcc = 5V: 1/tCLCL =3.5 MHz to16MHz

Vcc = 3.3V: 1/tCLCL =1 MHz to 16 MHz

Parameter

Symbol

16 MHz Oscillator

Variable Oscillator

1/tCLCL =3.5 to 16MHz

Unit

Min.

Max.

Min.

Max.

ALE pulse width

tLHLL

2tCLCL-40

Address setup to ALE

tAVLL

tCLCL-40

Address hold after ALE

tLLAX

tCLCL-40

ALE low to valid instruction in

tLLIV

-150

4tCLCL-100

ALE to PSEN

tLLPL

tCLCL-25

PSEN pulse width

tPLPH

153

3tCLCL-35

PSEN to valid instruction in

tPLIV

-88

3tCLCL-100

Input instruction hold after PSEN

tPXIX

Input instruction float after PSEN

tPXIZ1)

Interfacing the GMS90C320 to devices with float times up to 35 ns is permissible. This limited bus contention will not cause

any damage to port 0 Drivers.

-43

tCLCL-20

Address valid after PSEN

tPXAV1)

tCLCL-8

Address to valid instruction in

tAVIV

-198

5tCLCL-115

Address float to PSEN

tAZPL

-10

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