参数资料
型号: MC68HC05C9EFB
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封装: QFP-44
文件页数: 94/144页
文件大小: 1628K
代理商: MC68HC05C9EFB
MC68HC05C9E
Advance Information
MOTOROLA
Low-Power Modes
53
N
O
N-D
I
SC
L
O
SU
R
E
AG
R
EEMENT
R
E
Q
U
IR
ED
Advance Information — MC68HC05C9E
Section 6. Low-Power Modes
6.1 Contents
6.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.3
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.4
Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
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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