參數資料
型號: MC68HC05X4CDWR2
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PDSO28
封裝: PLASTIC, SOIC-28
文件頁數: 111/168頁
文件大?。?/td> 656K
代理商: MC68HC05X4CDWR2
MC68HC05X4 Rev 1.0
MOTOROLA
Resets, Interrupts and Low Power Modes
47
Resets, Interrupts and Low Power Modes
General Description
Contents
Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
RESET pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Illegal address reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Computer operating properly (COP) reset . . . . . . . . . . . . . . . . . . . 49
Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Non-maskable software interrupt (SWI) . . . . . . . . . . . . . . . . . . . . . 50
Maskable hardware interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
MCAN interrupt (CIRQ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Hardware controlled interrupt sequence . . . . . . . . . . . . . . . . . . . . . 52
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
STOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
WAIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Data retention mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Resets
The MCU can be reset in four ways: by the initial power-on reset
function, by an active low input to the RESET pin, by an opcode fetch
from an illegal address, and by a COP watchdog timer reset. See
Figure 1, below.
1-resets
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