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HYUNDAI MicroElectronics GMS90X5XC Series
38 Jan. 2001 Ver 1.0
AC Characteristics for GMS90X5XC series (40MHz)
External Data Memory Characteristics
Advance Information (40MHz)
External Clock Drive
Parameter Symbol
at 40 MHz Clock
Variable Clock
1/t
CLCL
= 3.5 to 40MHz
Unit
Min. Max. Min. Max.
RD
pulse width t
RLRH
120 - 6t
CLCL
-30 - ns
WR
pulse width t
WLWH
120 - 6t
CLCL
-30 - ns
Address hold after ALE t
LLAX2
10 - t
CLCL
-15 - ns
RD
to valid data in t
RLDV
-75 -5t
CLCL
-50 ns
Data hold after RD
t
RHDX
0- 0 - ns
Data float after RD
t
RHDZ
-38 -2t
CLCL
-12 ns
ALE to valid data in t
LLDV
-150 -8t
CLCL
-50 ns
Address to valid data in t
AVDV
-150 -9t
CLCL
-75 ns
ALE to WR
or RD t
LLWL
60 90 3t
CLCL
-15 3t
CLCL
+15 ns
Address valid to WR or RD t
AVWL
70 - 4t
CLCL
-30 - ns
WR
or RD high to ALE high t
WHLH
10 40 t
CLCL
-15 t
CLCL
+15 ns
Data valid to WR
transition t
QVWX
5-t
CLCL
-20 - ns
Data setup before WR t
QVWH
125 - 7t
CLCL
-50 - ns
Data hold after WR
t
WHQX
5-t
CLCL
-20 - ns
Address float after RD
t
RLAZ
-0 - 0 ns
Parameter Symbol
Variable Oscillator
(Freq. = 3.5 to 40MHz)
Unit
Min. Max.
Oscillator period t
CLCL
25 285.7 ns
High time t
CHCX
10 t
CLCL
- t
CLCX
ns
Low time t
CLCX
10 t
CLCL
- t
CHCX
ns
Rise time t
CLCH
-10ns
Fall time t
CHCL
-10ns