參數(shù)資料
型號： M30218MC-XXXXFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP100
封裝： PLASTIC, QFP-100
文件頁數(shù)： 100/161頁
文件大?。?/td> 2043K
代理商： M30218MC-XXXXFP
43
Under
development
Tentative Specifications REV.A
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupt
______
Figure DD-13. Switching condition of INT interrupt request
Set the polarity select bit
Clear the interrupt request bit to “0”
Set the interrupt priority level to level 1 to 7
(Enable the accepting of INTi interrupt request)
Set the interrupt priority level to level 0
(Disable INTi interrupt)
Clear the interrupt enable flag to “0”
(Disable interrupt)
Set the interrupt enable flag to “1”
(Enable interrupt)
Precautions for Interrupts
(1) Reading address 0000016
When maskable interrupt is occurred, CPU read the interrupt information (the interrupt number and
interrupt request level) in the interrupt sequence.
The interrupt request bit of the certain interrupt written in address 0000016 will then be set to “0”.
Reading address 0000016 by software sets enabled highest priority interrupt source request bit to “0”.
Though the interrupt is generated, the interrupt routine may not be executed.
Do not read address 0000016 by software.
(2) Setting the stack pointer
The value of the stack pointer immediately after reset is initialized to 000016. Accepting an interrupt
before setting a value in the stack pointer may become a factor of runaway. Be sure to set a value in
the stack pointer before accepting an interrupt.
(3) External interrupt
________
Either an “L” level or an “H” level of at least 250 ns width is necessary for the signal input to pins INT0
________
through INT5 regardless of the CPU operation clock.
________
When the polarity of the INT0 through INT5 pins is changed, the interrupt request bit is sometimes set to
“1”. After changing the polarity, set the interrupt request bit to “0”. Figure DD-13 shows the procedure
______
for changing the INT interrupt generate factor.
Precautions for Interrupts
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