GMS90 Series
HYUNDAI MicroElectronics
AC Characteristics for GMS90 series (16MHz)
External Data Memory Characteristics
Variable Oscillator
1/tCLCL = 3.5 to 16MHz
16 MHz Oscillator
Parameter
Symbol
Unit
Min.
275
275
23
-
Max.
Min.
Max.
tRLRH
tWLWH
tLLAX2
tRLDV
tRHDX
tRHDZ
tLLDV
-
6tCLCL-100
-
RD pulse width
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
-
-
6tCLCL-100
-
WR pulse width
tCLCL-40
-
Address hold after ALE
RD to valid data in
183
-
-
5tCLCL-130
0
0
-
Data hold after RD
-
75
350
398
238
-
-
2tCLCL-50
Data float after RD
-
-
8tCLCL-150
ALE to valid data in
Address to valid data in
ALE to WR or RD
tAVDV
tLLWL
tAVWL
tWHLH
tQVWX
tQVWH
tWHQX
tRLAZ
-
-
9tCLCL-165
138
120
28
13
288
23
-
3tCLCL−50
4tCLCL-130
3tCLCL+50
-
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
97
-
t
t
CLCL−35
CLCL−50
tCLCL+35
-
-
-
7tCLCL-150
-
t
CLCL−40
-
0
-
0
Advance Information (16MHz)
External Clock Drive
Variable Oscillator
(Freq. = 3.5 to 16MHz)
Parameter
Symbol
Unit
Min.
Max.
tCLCL
tCHCX
tCLCX
tCLCH
tCHCL
62.5
17
17
-
285.7
tCLCL - tCLCX
tCLCL - tCHCX
17
Oscillator period
High time
ns
ns
ns
ns
ns
Low time
Rise time
-
17
Fall time
Oct. 2000 Ver 3.1a
35
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