参数资料
型号: AT89C4051-24SU
厂商: Atmel
文件页数: 6/19页
文件大小: 0K
描述: IC MCU 4K FLASH 24MHZ 20-SOIC
产品培训模块: MCU Product Line Introduction
标准包装: 37
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 24MHz
连通性: UART/USART
外围设备: 欠压检测/复位,LED,POR
输入/输出数: 15
程序存储器容量: 4KB(4K x 8)
程序存储器类型: 闪存
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 6 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 20-SOIC(0.295",7.50mm 宽)
包装: 管件
产品目录页面: 616 (CN2011-ZH PDF)
14
1001F–MICRO–6/08
AT89C4051
21. Shift Register Mode Timing Waveforms
22. AC Testing Input/Output Waveforms
Note:
1. AC Inputs during testing are driven at V
CC - 0.5V for a logic 1 and 0.45V for a logic 0. Timing measurements are made at VIH
min. for a logic 1 and VIL max. for a logic 0.
23. Float Waveforms(1)
Note:
1. For timing purposes, a port pin is no longer floating when a 100 mV change from load voltage occurs. A port pin begins to
float when 100 mV change from the loaded VOH/VOL level occurs.
20. Serial Port Timing: Shift Register Mode Test Conditions
V
CC = 5.0V ± 20%; Load Capacitance = 80 pF
Symbol
Parameter
12 MHz Osc
Variable Oscillator
Units
Min
Max
Min
Max
tXLXL
Serial Port Clock Cycle Time
1.0
12tCLCL
s
t
QVXH
Output Data Setup to Clock Rising Edge
700
10t
CLCL-133
ns
tXHQX
Output Data Hold after Clock Rising Edge
50
2tCLCL-117
ns
tXHDX
Input Data Hold after Clock Rising Edge
0
ns
t
XHDV
Clock Rising Edge to Input Data Valid
700
10t
CLCL-133
ns
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