參數(shù)資料
型號: MC68HC05C9AFB
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封裝: QFP-44
文件頁數(shù): 114/162頁
文件大?。?/td> 1093K
代理商: MC68HC05C9AFB
MC68HC05C9A Rev. 5.0
Advance Information
MOTOROLA
Low-Power Modes
55
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IR
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Advance Information — MC68HC05C9A
Section 6. Low-Power Modes
6.1 Contents
6.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.3
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.4
Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
6.2 Introduction
This section describes the low-power stop and wait modes.
6.3 Stop Mode
The STOP instruction places the microcontroller unit (MCU) in its lowest-
power consumption mode. In stop mode, the internal oscillator is turned
off, halting all internal processing, including timer operation.
During stop mode, the TCR bits are altered to remove any pending timer
interrupt request and to disable any further timer interrupts. The timer
prescaler is cleared. The I bit in the condition code register (CCR) is
cleared to enable external interrupts. All other registers and memory
remain unaltered. All input/output (I/O) lines remain unchanged. The
processor can be brought out of stop mode only by an external interrupt
or reset. See Figure 6-1.
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