參數(shù)資料
型號: MC68HC05PD6
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP80
封裝: PLASTIC, TQFP-80
文件頁數(shù): 135/165頁
文件大?。?/td> 841K
代理商: MC68HC05PD6
July 7, 1997
GENERAL RELEASE SPECIFICATION
MC68HC05PD6
CLOCK DISTRIBUTION
MOTOROLA
REV 1.1
8-11
*Main program
BSET0,$3AEnable RTC (once a day) interrupt.
BSET
1,$3A
Enable RTC (alarm) interrupt.
BSET
2,$3A
Enable RTC (once a second) interrupt.
STOP
MCU execute STOP instruction for power
conservation.
*Real time clock interrupt service routine
BRSET
0,$39,ODAY
This bit is set indicating this is an once a day
RTC interrupt.
BRSET
1,$39,ALINT
This bit is set indicating this is a RTC interrupt
caused by a match of alarm registers and real time
clock registers.
BRSET
2,$39,OSEC
This bit is set indicating this is an once a second
RTC interrupt.
ODAY
BSET
0,$39
Clear this bit so that this once a day interrupt
will not be recognized as a new one on next RTC
interrupt.
JSR
OADAY
Once a day interrupt service routine.
BRSET
1,$39,ALINT
This bit is set indicating alarm interrupt also
occurs at the same time.
BRSET
2,$39,OSEC
This bit is set indicating once a second RTC
interrupt also occurs at the same time.
RTCR
RTI
ALINT
BSET
1,$39
Clear this bit so that this alarm interrupt will
not be recognized as a new one on next RTC
interrupt.
JSR
ALARM
Alarm service interrupt routine.
BRSET
2,$39,OSEC
This bit is set indicating once a second interrupt
also occurs at the same time.
BRA
RTCR
Return from interrupt.
OSEC
BSET
2,$39
Clear this bit so that this once a second interrupt
will not be recognized as a new one on next RTC
interrupt.
JSR
OASEC
Once a second interrupt service routine.
BRA
RTCR
Return from interrupt.
8.6
MISCELLANEOUS REGISTER (MISC)
FTUP – OSC Time Up Flag
Power on detection or clearing FOSCE bit clears this bit. This bit is set by the
overow of the POR counter. An external reset does not affect this bit.
0 =
during POR or OSC shut down
1 =
OSC clock is available for the system clock
W
R
MISC
$003E
reset
FTUP
X
7
00
54
X
1010
6
3210
STUP
0
SYS1
SYS0
OPTM
FOSCE
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