AT89C51CC03C-RLTIM 查看數據表（PDF） - Atmel Corporation

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AT89C51CC03C-RLTIM

Enhanced 8-bit MCU with CAN Controller and Flash Memory

Atmel Corporation 

Reset

Introduction

Reset Input

The reset sources are : Power Management, Hardware Watchdog, PCA Watchdog and

Reset input.

Figure 16. Reset Schematic

Power

Monitor

Hardware

Watchdog

PCA

Watchdog

Internal Reset

RST

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 VCC as shown in Figure 17. Resistor

value and input characteristics are discussed in the Section “DC Characteristics” of the

AT89C51CC03 datasheet. The status of the Port pins during reset is detailed in Table 9.

Figure 17. Reset Circuitry and Power-On Reset

RST

To internal reset

VSS

a. RST input circuitry

VDD

+

RST

b. Power-on Reset

32 AT89C51CC03

4182K–CAN–05/06

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