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GMS90C51 Datasheet(PDF) 38 Page - Hynix Semiconductor

Part # GMS90C51
Description  8-BIT SINGLE-CHIP MICROCONTROLLERS
PDF  59 Pages
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Manufacturer  HYNIX [Hynix Semiconductor]
Direct Link  http://www.skhynix.com/kor/main.do
Logo HYNIX - Hynix Semiconductor

GMS90C51 Datasheet(HTML) 38 Page - Hynix Semiconductor

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GMS90 Series
34
Dec. 1998 Ver 3.0
AC Characteristics for GMS90 series (16MHz version)
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)
External Program Memory Characteristics
† Interfacing the GMS90 series to devices with float times up to 35 ns is permissible. This limited bus contention will not cause
any damage to port 0 Drivers.
Parameter
Symbol
16 MHz Oscillator
Variable Oscillator
1/tCLCL = 3.5 to 16MHz
Unit
Min.
Max.
Min.
Max.
ALE pulse width
tLHLL
85
-
2tCLCL-40
-
ns
Address setup to ALE
tAVLL
23
-
tCLCL-40
-
ns
Address hold after ALE
tLLAX
23
-
tCLCL-40
-
ns
ALE low to valid instruction in
tLLIV
-150
-
4tCLCL-100
ns
ALE to PSEN
tLLPL
38
-
tCLCL-25
-
ns
PSEN pulse width
tPLPH
153
-
3tCLCL-35
-
ns
PSEN to valid instruction in
tPLIV
-88
-
3tCLCL-100
ns
Input instruction hold after PSEN
tPXIX
0-
0
-
ns
Input instruction float after PSEN
tPXIZ †
-43
-
tCLCL-20
ns
Address valid after PSEN
tPXAV †
55
-
tCLCL-8
-
ns
Address to valid instruction in
tAVIV
-198
-
5tCLCL-115
ns
Address float to PSEN
tAZPL
0-
0
-
ns



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