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): 38/73頁
文件大小: 696K
代理商: HMS99C58S
HMS99C51S/52S/54S/56S/58S
34
Sep. 2004 Ver 1.01
AC Characteristics for HMS99C51S/52S/54S/56S/58S(40MHz version)
V
CC
= 5V + 10%,
15%, V
SS
= 0V, T
A
= -40
°
C to 85
°
C
(C
L
for port 0, ALE and PSEN outputs = 100pF, C
L
for all other outputs = 80pF)
External Program Memory Characteristics
Interfacing the HMS99C51S/52S/54S/56S/58S to devices with float times up to 20 ns is permissible. This limited bus conten-
tion will not cause any damage to port 0 Drivers.
Parameter
Symbol
40 MHz Oscillator
Variable Oscillator
1/t
CLCL
= 3.5 to 40MHz
Unit
Min.
Max.
Min.
Max.
ALE pulse width
t
LHLL
40
-
2t
CLCL
20
-
ns
Address setup to ALE
t
AVLL
10
-
t
CLCL
20
-
ns
Address hold after ALE
t
LLAX
10
-
t
CLCL
20
-
ns
ALE low to valid instruction in
t
LLIV
-
56
-
4t
CLCL
65
ns
ALE to PSEN
t
LLPL
15
-
t
CLCL
15
-
ns
PSEN pulse width
t
PLPH
80
-
3t
CLCL
20
-
ns
PSEN to valid instruction in
t
PLIV
-
35
-
3t
CLCL
55
ns
Input instruction hold after PSEN
t
PXIX
0
-
0
-
ns
Input instruction float after PSEN
t
PXIZ
-
20
-
t
CLCL
10
ns
Address valid after PSEN
t
PXAV
25
-
t
CLCL
5
-
ns
Address to valid instruction in
t
AVIV
-
91
-
5t
CLCL
60
ns
Address float to PSEN
t
AZPL
0
-
0
-
ns
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