參數(shù)資料
型號: HMS99C51
廠商: Hynix Semiconductor Inc.
元件分類: 8位微控制器
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 8位單晶片微控制器
文件頁數(shù): 36/43頁
文件大?。?/td> 533K
代理商: HMS99C51
HMS99C5X Series
32
Jan. 2003 Ver 1.0
AC Characteristics for HMS99C5X 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
132
-
6t
CLCL
-50
-
ns
WR pulse width
t
WLWH
132
-
6t
CLCL
-50
-
ns
Address hold after ALE
t
LLAX2
10
-
t
CLCL
-20
-
ns
RD to valid data in
t
RLDV
-
81
-
5t
CLCL
-70
ns
Data hold after RD
t
RHDX
0
-
0
-
ns
Data float after RD
t
RHDZ
-
46
-
2t
CLCL
-15
ns
ALE to valid data in
t
LLDV
-
153
-
8t
CLCL
-90
ns
Address to valid data in
t
AVDV
-
183
-
9t
CLCL
-90
ns
ALE to WR or RD
t
LLWL
71
111
3t
CLCL
-20
3t
CLCL
+20
ns
Address valid to WR or RD
t
AVWL
66
-
4t
CLCL
-55
-
ns
WR or RD high to ALE high
t
WHLH
10
40
t
CLCL
-20
t
CLCL
+20
ns
Data valid to WR transition
t
QVWX
5
-
t
CLCL
-25
-
ns
Data setup before WR
t
QVWH
142
-
7t
CLCL
-70
-
ns
Data hold after WR
t
WHQX
10
-
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
30.3
285.7
ns
High time
t
CHCX
11.5
t
CLCL
- t
CLCX
ns
Low time
t
CLCX
11.5
t
CLCL
- t
CHCX
ns
Rise time
t
CLCH
-
5
ns
Fall time
t
CHCL
-
5
ns
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