參數(shù)資料
型號(hào): M30201M4-114FP
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
中文描述: 單片16位CMOS微機(jī)
文件頁數(shù): 110/159頁
文件大小: 2319K
代理商: M30201M4-114FP
Unde
Usage precaution
deeopmen
Mitsubishi microcomputers
M30201 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
110
Interrupts
(1) Reading address 00000
16
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 00000
16
will then be set to “0”.
Reading address 00000
16
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 00000
16
by software.
(2) Setting the stack pointer
The value of the stack pointer immediately after reset is initialized to 0000
16
. 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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