GMS97C8HPL View Datasheet(PDF) - Hynix Semiconductor
Part Name
Description
MFG CO.
'GMS97C8HPL' PDF : 59 Pages View PDF
GMS90 Series
AC Characteristics
Explanation of the AC Symbols
Each timing symbol has 5 characters. The first character is always a ‘t’ (stand for time). The other characters,
depending on their positions, stand for the name of a signal or the logical status of that signal. The following is
a list of all the characters and what they stand for.
A: Address
C: Clock
D: Input Data
H: Logic level HIGH
I: Instruction (program memory contents)
L: Logic level LOW, or ALE
P: PSEN
Q: Output Data
R: RD signal
T: Time
V: Valid
W: WR signal
X: No longer a valid logic level
Z: Float
For example,
tAVLL = Time from Address Valid to ALE Low
tLLPL = Time from ALE Low to PSEN Low
AC Characteristics for GMS90 series (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
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
tLHLL
tAVLL
tLLAX
tLLIV
tLLPL
tPLPH
tPLIV
tPXIX
tPXIZ †
tPXAV †
12 MHz Oscillator
Min.
127
43
30
-
58
215
-
0
-
75
Max.
-
-
-
233
-
-
150
-
63
-
Variable Oscillator
1/tCLCL = 3.5 to 12MHz
Min.
Max.
2tCLCL-40
tCLCL-40
tCLCL-53
-
tCLCL-25
3tCLCL-35
-
0
-
-
-
4tCLCL-100
-
-
3tCLCL-100
-
-
tCLCL-20
tCLCL-8
-
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Oct. 2000 Ver 3.1a
31
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