参数资料
型号: MC68HC05RC18FN
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44
封装: PLASTIC, LCC-44
文件页数: 85/126页
文件大小: 1180K
代理商: MC68HC05RC18FN
MC68HC05RC18 Rev. 2.1
General Release Specification
Freescale Semiconductor
Low-Power Modes
59
NON-DISCLOSURE
AGREEMENT
REQUIRED
General Release Specification — MC68HC05RC18
Section 7. Low-Power Modes
7.1 Contents
7.2 Introduction
This section describes the low-power modes, which are stop mode and
wait mode.
7.3 Stop Mode
The STOP instruction places the MCU in its lowest power-consumption
mode. In stop mode, the internal oscillator is turned off, halting all
internal processing, including timer operation.
When stop mode is entered, all core timer counter bits are cleared. The
I bit in the CCR is cleared to enable interrupts, but all interrupts are held
pending until the device is brought out of stop mode. All other registers
and memory remain unaltered. All input/output lines remain unchanged.
NOTE:
If an external interrupt is pending when stop mode is entered, then stop
mode will be exited immediately.
The EIMSK bit is not cleared automatically by the execution of a STOP
instruction. Care should be taken to clear this bit before entering stop
mode.
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