參數(shù)資料
型號: MC68HLC705KJ1CDW
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDSO16
封裝: SOIC-16
文件頁數(shù): 89/117頁
文件大小: 1644K
代理商: MC68HLC705KJ1CDW
MC68HC705KJ1MC68HRC705KJ1MC68HLC705KJ1 — Rev. 4.0
Data Sheet
MOTOROLA
Resets and Interrupts
73
Data Sheet — MC68HC705KJ1
Section 8. Resets and Interrupts
8.1 Introduction
Reset initializes the MCU by returning the program counter to a known address and
by forcing control and status bits to known states.
Interrupts temporarily change the sequence of program execution to respond to
events that occur during processing.
A reset immediately stops the operation of the instruction being executed,
initializes certain control and status bits, and loads the program counter with a
user-defined reset vector address. The following sources can generate a reset:
Power-on reset (POR) circuit
RESET pin
Computer operating properly (COP) watchdog
Illegal address
Figure 8-1. Reset Sources
8.2.1 Power-On Reset
A positive transition on the VDD pin generates a power-on reset.
NOTE:
The power-on reset is strictly for power-up conditions and cannot be used to detect
drops in power supply voltage.
DQ
CK
S
RESET
LATCH
INTERNAL CLOCK
RST
TO CPU AND
RESET PIN
VDD
PERIPHERAL
MODULES
ILLEGAL ADDRESS
COP WATCHDOG
POWER-ON RESET
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