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GMS90C320 Datasheet, PDF (39/46 Pages) Hynix Semiconductor – HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS
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GMS90C320
AC Characteristics for 50MHz
External Data Memory Characteristics
Parameter
Symbol
RD pulse width
WR pulse width
Address hold after ALE
RD to valid data in
Data hold after RD
Data float after RD
ALE to valid data in
Address to valid data in
ALE to WR or RD
Address valid to WR or RD
WR or RD high to ALE high
Data valid to WR transition
Data setup before WR
Data hold after WR
Address float after RD
tR L R H
tW LW H
tL L A X 2
tR L D V
tRHD X
tRHD Z
tLLD V
tAVD V
tLLW L
tAVW L
tW HLH
tQ VW X
tQ VW H
tW HQ X
tR L A Z
Advance Information (50MHz)
External Clock Drive
Parameter
Symbol
Oscillator period
High time
Low time
Rise time
Fall time
tC L C L
tCHC X
tC L C X
tC L C H
tCHC L
at 50 MHz Clock
Min.
90
90
25
-
0
-
-
-
45
50
5
5
100
5
-
Max.
-
-
-
60
-
28
120
125
75
-
35
-
-
-
0
Variable Clock
1/tCLCL = 3.5 to 50MHz
Min.
Max.
6tC L C L -30
6tC L C L -30
2tC L C L -15
-
0
-
-
-
5tC L C L -40
-
-
-
-
3tC L C L -15
4tC L C L -30
tC L C L -15
tC L C L -15
7tC L C L -40
tC L C L -15
-
2tC L C L -12
8tC L C L -40
9tC L C L -55
3tC L C L +15
-
tC L C L +15
-
-
-
0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Variable Oscillator
(Freq. = 3.5 to 50MHz)
Min.
Max.
20
285.7
10
tC LCL - tC LC X
10
tC LC L - tCH CX
-
10
-
10
Unit
ns
ns
ns
ns
ns
OCT. 2000 Ver 1.2
35
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