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GMS90C51 Datasheet(PDF) 37 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) 37 Page - Hynix Semiconductor

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GMS90 Series
Dec. 1998 Ver 3.0
33
AC Characteristics for GMS90 series (12MHz)
External Data Memory Characteristics
Advance Information (12MHz)
External Clock Drive
Parameter
Symbol
12 MHz Oscillator
Variable Oscillator
1/tCLCL = 3.5 to 12MHz
Unit
Min.
Max.
Min.
Max.
RD pulse width
tRLRH
400
-
6tCLCL-100
-
ns
WR pulse width
tWLWH
400
-
6tCLCL-100
-
ns
Address hold after ALE
tLLAX2
53
-
tCLCL-30
-
ns
RD to valid data in
tRLDV
-252
-
5tCLCL-165
ns
Data hold after RD
tRHDX
0-
0
-
ns
Data float after RD
tRHDZ
-97
-
2tCLCL-70
ns
ALE to valid data in
tLLDV
-517
-
8tCLCL-150
ns
Address to valid data in
tAVDV
-585
-
9tCLCL-165
ns
ALE to WR or RD
tLLWL
200
300
3tCLCL-50
3tCLCL+50
ns
Address valid to WR or RD
tAVWL
203
-
4tCLCL-130
-
ns
WR or RD high to ALE high
tWHLH
43
123
tCLCL-40
tCLCL+40
ns
Data valid to WR transition
tQVWX
33
-
tCLCL-50
-
ns
Data setup before WR
tQVWH
433
-
7tCLCL-150
-
ns
Data hold after WR
tWHQX
33
-
tCLCL-50
-
ns
Address float after RD
tRLAZ
-0
-
0
ns
Parameter
Symbol
Variable Oscillator
(Freq. = 3.5 to 12MHz)
Unit
Min.
Max.
Oscillator period (VCC=5V)
Oscillator period (VCC=3.3V)
tCLCL
tCLCL
83.3
83.3
285.7
1
ns
High time
tCHCX
20
tCLCL - tCLCX
ns
Low time
tCLCX
20
tCLCL - tCHCX
ns
Rise time
tCLCH
-20
ns
Fall time
tCHCL
-20
ns



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