参数资料
型号: MC68HC05K0VDW
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO16
封装: SOIC-16
文件页数: 106/154页
文件大小: 1544K
代理商: MC68HC05K0VDW
Resets
Reset Types
MC68HC05K0 MC68HC05K1 — Rev. 2.0
Technical Data
MOTOROLA
Resets
55
5.3.2 External Reset
An external reset is generated by applying a logic 0 for 1 1/2 tcyc to the
RESET pin. A Schmitt trigger senses the logic level at the RESET pin.
A COP reset or an illegal address reset pulls the RESET pin low for one
internal clock cycle. A low-voltage reset pulls the RESET pin low for as
long as the low-voltage condition exists.
NOTE:
To avoid overloading some power supply designs, do not connect the
RESET pin directly to VDD. Use a pullup resistor of 10 k or more.
Figure 5-1. Reset Sources
VDD
RESET
LATCH
R
COP WATCHDOG
LOW-VOLTAGE RESET
POWER-ON RESET
ILLEGAL ADDRESS RESET
INTERNAL ADDRESS BUS
D
INTERNAL
CLOCK
S
(MASK OPTION)
RST
TO CPU AND
SUBSYSTEMS
(MASK OPTION)
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