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參數(shù)資料
| 型號： | MC68HLC705KJ1CP |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數(shù)： | 73/117頁 |
| 文件大?。?/td> | 1644K |
| 代理商： | MC68HLC705KJ1CP |
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MC68HC705KJ1MC68HRC705KJ1MC68HLC705KJ1 — Rev. 4.0
Data Sheet
MOTOROLA
Low-Power Modes
59
Data Sheet — MC68HC705KJ1
Section 6. Low-Power Modes
6.1 Introduction
The MCU can enter the following low-power standby modes:
Stop mode — The STOP instruction puts the MCU in its lowest
power-consumption mode.
Wait mode — The WAIT instruction puts the MCU in an intermediate
power-consumption mode.
Halt mode — Halt mode is identical to wait mode, except that an oscillator
stabilization delay of 1 to 4064 internal clock cycles occurs when the MCU
exits halt mode. The stop-to-wait conversion bit, SWAIT, in the mask option
register, enables halt mode.
Enabling halt mode prevents the computer operating properly (COP)
watchdog from being inadvertently turned off by a STOP instruction.
Data-retention mode — In data-retention mode, the MCU retains RAM
contents and CPU register contents at VDD voltages as low as 2.0 Vdc. The
data-retention feature allows the MCU to remain in a low
power-consumption state during which it retains data, but the CPU cannot
execute instructions.
6.2 Exiting Stop and Wait Modes
The following events bring the MCU out of stop mode and load the program counter
with the reset vector or with an interrupt vector:
Exiting Stop Mode
External reset — A logic 0 on the RESET pin resets the MCU, starts the CPU
clock, and loads the program counter with the contents of locations $07FE
and $07FF.
External interrupt — A high-to-low transition on the IRQ/VPP pin or a
low-to-high transition on an enabled port A external interrupt pin starts the
CPU clock and loads the program counter with the contents of locations
$07FA and $07FB.
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