GMS90C320 Datasheet, PDF (36/46 Pages) Hynix Semiconductor – HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS90C320
AC Characteristics for 40MHz version
V_CC = 5V + 10%, − 15%; V_SS= 0V; T_A = 0°C to 70°C
(C_L for port 0. ALE and PSEN outputs = 100pF; C_L for all other outputs = 80pF)
External Program Memory Characteristics
Parameter
Symbol
40 MHz Oscillator
Variable Oscillator
1/t_CLCL = 3.5 to 40MHz
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
t_{L H L L}
t_{A V L L}
t_{L L A X}
t_{L L I V}
t_{L L P L}
t_{P L P H}
t_{P L IV}
t_{P X IX}
t_{P X IZ} ¹⁾
t_PXAV ¹⁾
t_{A V IV}
t_{A Z P L}
35
-
2t_{C L C L} −15
-
ns
10
-
t_{C L C L} −15
-
ns
10
-
t_{C L C L} −15
-
ns
-
55
-
4t_{C L C L} −45
ns
10
-
t_{C L C L} −15
-
ns
60
-
3t_{C L C L} −15
-
ns
-
25
-
3t_{C L C L} −50
ns
0
-
0
-
ns
-
15
-
t_{C L C L} −10
ns
20
-
t_{C L C L} −5
-
ns
-
65
-
5t_{C L C L} −60
ns
-5
-
-5
-
ns
1) _{Interfacing the GMS90C320 to devices with float times up to 20 ns is permissible. This limited bus contention will not cause any damage}
to port 0 Drivers.
32
OCT. 2000 Ver 1.2