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GMS90C320 Datasheet, PDF (30/46 Pages) Hynix Semiconductor – HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS
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GMS90C320
AC Characteristics for 12MHz version
VCC= 5V:
VCC= 3.3V:
Variable clock:
VCC= 5V + 10%, −15%; VSS= 0V; TA= 0°C to 70°C
(CL for port 0. ALE and PSEN outputs = 100pF; CL for all other outputs = 80pF)
VCC= 3.3V + 0.3V, −0.6V; VSS= 0V; TA= 0°C to 70°C
(CL for port 0. ALE and PSEN outputs = 50pF; CL for all other outputs = 50pF)
Vcc = 5V: 1/tCLCL = 3.5 MHz to 12 MHz
Vcc = 3.3V: 1/tCLCL = 1 MHz to 12 MHz
External Program Memory Characteristics
Parameter
Symbol
12 MHz Oscillator
Variable Oscillator
1/tCLCL = 3.5 to 12MHz
Unit
Min.
Max.
Min.
Max.
ALE pulse width
Address setup to ALE
Address hold after ALE
ALE low to valid instruction in
ALE to PSEN
PSEN pulse width
PSEN to valid instruction in
Input instruction hold after PSEN
Input instruction float after PSEN
Address valid after PSEN
Address to valid instruction in
Address float to PSEN
tL H L L
tA V L L
tL L A X
tL L I V
tL L P L
tP L P H
tP L IV
tP X IX
tP X IZ 1)
tPXAV 1)
tA V IV
tA Z P L
127
-
2tC L C L -40
-
ns
43
-
tC L C L -40
-
ns
43
-
tC L C L -40
-
ns
-
233
-
4tC L C L -100
ns
58
-
tC L C L -25
-
ns
215
-
3tC L C L -35
-
ns
-
150
-
3tC L C L -100
ns
0
-
0
-
ns
-
63
-
tC L C L -20
ns
75
-
tC L C L -8
-
ns
-
302
-
5tC L C L -115
ns
-10
-
-10
-
ns
1) Interfacing the GMS90C320 to devices with float times up to 75 ns is permissible. This limited bus contention will not cause any damage
to port 0 Drivers.
26
OCT. 2000 Ver 1.2
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