參數(shù)資料
型號: HMS99C58S
廠商: Electronic Theatre Controls, Inc.
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS WITH EMBEDDED FLASH
中文描述: 8位單片機與嵌入式閃存微控制器
文件頁數(shù): 35/73頁
文件大?。?/td> 696K
代理商: HMS99C58S
HMS99C51S/52S/54S/56S/58S
Sep. 2004 Ver 1.01
31
AC Characteristics for HMS99C51S/52S/54S/56S/58S (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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