参数资料
型号: AT89C51ID2-SLSUM
厂商: Atmel
文件页数: 83/157页
文件大小: 0K
描述: IC 8051 MCU FLASH 64K 44PLCC
产品培训模块: MCU Product Line Introduction
标准包装: 972
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 60MHz
连通性: I²C,SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 64KB(64K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 2K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 管件
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
31
AT89C51ID2
4289C–8051–11/05
Reset
Introduction
The reset sources are : Power Management, Hardware Watchdog, PCA Watchdog and
Reset input.
Figure 7. Reset schematic
Reset Input
The Reset input can be used to force a reset pulse longer than the internal reset con-
trolled by the Power Monitor. RST input has a pull-down resistor allowing power-on
reset by simply connecting an external capacitor to V
CC as shown in Figure 8. Resistor
value and input characteristics are discussed in the Section “DC Characteristics” of the
AT89C51ID2 datasheet.
Figure 8. Reset Circuitry and Power-On Reset
Power
Monitor
Hardware
Watchdog
PCA
Watchdog
RST
Internal Reset
RST
R
RS
T
VSS
To internal reset
RST
VDD
+
b. Power-on Reset
a. RST input circuitry
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