参数资料
型号: AT87F52-24PC
厂商: Atmel
文件页数: 9/24页
文件大小: 0K
描述: IC MICRO CTRL 24MHZ 40DIP
标准包装: 10
系列: 87F
核心处理器: 8051
芯体尺寸: 8-位
速度: 24MHz
连通性: UART/USART
输入/输出数: 32
程序存储器容量: 8KB(8K x 8)
程序存储器类型: OTP 快速闪存
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 6 V
振荡器型: 内部
工作温度: 0°C ~ 70°C
封装/外壳: 40-DIP(0.600",15.24mm)
包装: 管件
Not
17
AC Characteristics
Under operating conditions, load capacitance for Port 0, ALE/PROG, and PSEN = 100 pF; load capacitance for all other
outputs = 80 pF.
External Program and Data Memory Characteristics
Symbol
Parameter
12 MHz Oscillator
Variable Oscillator
Units
Min
Max
Min
Max
1/tCLCL
Oscillator Frequency
0
24
MHz
tLHLL
ALE Pulse Width
127
2tCLCL-40
ns
tAVLL
Address Valid to ALE Low
43
tCLCL-13
ns
tLLAX
Address Hold After ALE Low
48
tCLCL-20
ns
tLLIV
ALE Low to Valid Instruction In
233
4tCLCL-65
ns
tLLPL
ALE Low to PSEN Low
43
tCLCL-13
ns
tPLPH
PSEN Pulse Width
205
3tCLCL-20
ns
tPLIV
PSEN Low to Valid Instruction In
145
3tCLCL-45
ns
tPXIX
Input Instruction Hold After PSEN
00
ns
tPXIZ
Input Instruction Float After PSEN
59
tCLCL-10
ns
tPXAV
PSEN to Address Valid
75
tCLCL-8
ns
tAVIV
Address to Valid Instruction In
312
5tCLCL-55
ns
tPLAZ
PSEN Low to Address Float
10
ns
tRLRH
RD Pulse Width
400
6tCLCL-100
ns
tWLWH
WR Pulse Width
400
6tCLCL-100
ns
tRLDV
RD Low to Valid Data In
252
5tCLCL-90
ns
tRHDX
Data Hold After RD
00
ns
tRHDZ
Data Float After RD
97
2tCLCL-28
ns
tLLDV
ALE Low to Valid Data In
517
8tCLCL-150
ns
tAVDV
Address to Valid Data In
585
9tCLCL-165
ns
tLLWL
ALE Low to RD or WR Low
200
300
3tCLCL-50
3tCLCL+50
ns
tAVWL
Address to RD or WR Low
203
4tCLCL-75
ns
tQVWX
Data Valid to WR Transition
23
tCLCL-20
ns
tQVWH
Data Valid to WR High
433
7tCLCL-120
ns
tWHQX
Data Hold After WR
33
tCLCL-20
ns
tRLAZ
RD Low to Address Float
0
ns
tWHLH
RD or WR High to ALE High
43
123
tCLCL-20
tCLCL+25
ns
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