參數(shù)資料
型號(hào): LS87C52
廠商: INTEL CORP
元件分類: 微控制器/微處理器
英文描述: CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
中文描述: 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PQFP44
封裝: QFP-44
文件頁數(shù): 13/23頁
文件大小: 319K
代理商: LS87C52
8XC52/54/58
EXTERNAL MEMORY CHARACTERISTICS
(Continued)
All parameter values apply to all devices unless otherwise indicated.
Symbol
Parameter
Oscillator
Units
12 MHz
24 MHz
33 MHz
Variable
Min
Max
Min
Max
Min
Max
Min
Max
TLLPL
ALE Low to
PSEN Low
8XC5X/-24
8XC5X-33
53
12
TCLCL
b
30
TCLCL
b
25
ns
ns
5
TPLPH
PSEN Pulse
Width
205
80
46
3 TCLCL
b
45
ns
TPLIV
PSEN Low to
Valid
Instruction In
8XC5X
8XC5X-24
8XC5X-33
145
3 TCLCL
b
105
3 TCLCL
b
90
3 TCLCL
b
55
ns
ns
ns
35
35
TPXIX
Input
Instruction
Hold After
PSEN
0
0
0
0
ns
TPXIZ
Input
Instruction
Float After
PSEN
8XC5X
8XC5X-24
8XC5X-33
59
TCLCL
b
25
TCLCL
b
20
TCLCL
b
25
ns
ns
ns
21
5
TAVIV
Address to
Valid
Instruction In
8XC5X/-24
8XC5X-33
312
103
5 TCLCL
b
105
5 TCLCL
b
80
ns
ns
71
TPLAZ
PSEN Low to
Address
Float
10
10
10
10
ns
TRLRH
RD Pulse
Width
400
150
82
6 TCLCL
b
100
ns
TWLWH
WR Pulse
Width
400
150
82
6 TCLCL
b
100
ns
13
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