参数资料
型号: M30201F4T-FP
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP56
封装: PLASTIC, QFP-56
文件页数: 14/158页
文件大小: 1633K
代理商: M30201F4T-FP
110
Under
development
Mitsubishi microcomputers
M30201 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Usage precaution
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 inter-
rupt 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.
Concerning the first instruction immediately after reset, generating any interrupt is prohibited.
(3) External interrupt
________
When changing a polarity of pins INT0 and INT1, the interrupt request bit may become "1". Clear
the interrupt request bit after changing the polarity.
(4) Changing interrupt control register
See "Changing Interrupt Control Register".
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