參數(shù)資料
型號: MC68HC05G3
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 40/128頁
文件大?。?/td> 290K
代理商: MC68HC05G3
Page 9
Section 1: INTRODUCTION
MOTOROLA
MC68HC05G3 (705G4) Specification Rev. 1.1
1.4.1.5
STOP AND WAIT MODES
During stop mode, the main oscillator (OSC) is shut down and the clock pass from the
second oscillator (XOSC) is disconnected so that all modules except time base are halted.
Entering stop mode clears FTUP flag in the MISC register and initializes the POD counter.
The stop mode is exited by the RESET, IRQ1/2, KWI, SPI1/2 (slave mode), or TB interrupt
(TBCLK=0).
If OSC is selected as the system clock source during stop mode, CPU resumes after the
overflow of the POD counter and this overflow sets FTUP status flag.
If XOSC is selected as system clock source during stop mode, no stop recovery time is
required for exiting stop mode because XOSC never stops and re-start of main oscillator
depends on FOSCE bit.
During wait mode, only the CPU clocks are halted and the peripheral modules are bit
affected. The wait mode is exited by RESET or any interrupts.
Table 1-2: Recovery Time Requirements
CPU CLOCK SOURCE
BEFORE RESET OR INTERRUPT
---------------
OSC (OSC ON)
OSC (OSC OFF)
XOSC (OSC ON)
XOSC (OSC OFF)
STOP
FOSCE
-------
OUT
1
OUT
IN
IN *2
0 *1
1
0 *2
OUT
IN
1
0
1
0
POWER ON
EXTERNAL
RESET
EXIT STOP
MODE BY
INTERRUPT
WAIT
NO WAIT
WAIT
NO WAIT
WAIT
---------------
WAIT
NO WAIT
*1 THIS CASE HAS NO MEANING FOR THE APPLICATIONS
*2 THIS CASE NEVER OCCURS
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