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): 32/43頁
文件大小: 533K
代理商: HMS99C51
HMS99C5X Series
28
Jan. 2003 Ver 1.0
AC Characteristics for HMS99C5X series (12MHz)
External Data Memory Characteristics
Advance Information (12MHz)
External Clock Drive
Parameter
Symbol
12 MHz Oscillator
Variable Oscillator
1/t
CLCL
= 3.5 to 12MHz
Unit
Min.
Max.
Min.
Max.
RD pulse width
t
RLRH
400
-
6t
CLCL
-100
-
ns
WR pulse width
t
WLWH
400
-
6t
CLCL
-100
-
ns
Address hold after ALE
t
LLAX2
53
-
t
CLCL
-30
-
ns
RD to valid data in
t
RLDV
-
252
-
5t
CLCL
-165
ns
Data hold after RD
t
RHDX
0
-
0
-
ns
Data float after RD
t
RHDZ
-
97
-
2t
CLCL
-70
ns
ALE to valid data in
t
LLDV
-
517
-
8t
CLCL
-150
ns
Address to valid data in
t
AVDV
-
585
-
9t
CLCL
-165
ns
ALE to WR or RD
t
LLWL
200
300
3t
CLCL
-50
3t
CLCL
+50
ns
Address valid to WR or RD
t
AVWL
203
-
4t
CLCL
-130
-
ns
WR or RD high to ALE high
t
WHLH
43
123
t
CLCL
-40
t
CLCL
+40
ns
Data valid to WR transition
t
QVWX
33
-
t
CLCL
-50
-
ns
Data setup before WR
t
QVWH
433
-
7t
CLCL
-150
-
ns
Data hold after WR
t
WHQX
33
-
t
CLCL
-50
-
ns
Address float after RD
t
RLAZ
-
0
-
0
ns
Parameter
Symbol
Variable Oscillator
(Freq. = 3.5 to 12MHz)
Unit
Min.
Max.
Oscillator period (V
CC
=5V)
t
CLCL
83.3
285.7
ns
High time
t
CHCX
20
t
CLCL
- t
CLCX
ns
Low time
t
CLCX
20
t
CLCL
- t
CHCX
ns
Rise time
t
CLCH
-
20
ns
Fall time
t
CHCL
-
20
ns
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