參數(shù)資料
型號(hào)： M30218MFCFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP100
封裝： PLASTIC, QFP-100
文件頁數(shù)： 92/161頁
文件大?。?/td> 2043K
代理商： M30218MFCFP
36
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
Interrupt Sequence
An interrupt sequence — what are performed over a period from the instant an interrupt is accepted to the
instant the interrupt routine is executed — is described here.
If an interrupt occurs during execution of an instruction, the processor determines its priority when the
execution of the instruction is completed, and transfers control to the interrupt sequence from the next
cycle. If an interrupt occurs during execution of either the SMOVB, SMOVF, SSTR or RMPA instruction,
the processor temporarily suspends the instruction being executed, and transfers control to the interrupt
sequence.
In the interrupt sequence, the processor carries out the following in sequence given:
(1) CPU gets the interrupt information (the interrupt number and interrupt request level) by reading ad-
dress 0000016.
(2) Saves the content of the flag register (FLG) as it was immediately before the start of interrupt sequence
in the temporary register (Note) within the CPU.
(3) Sets the interrupt enable flag (I flag), the debug flag (D flag), and the stack pointer select flag (U flag) to
“0” (the U flag, however does not change if the INT instruction, in software interrupt numbers 32
through 63, is executed)
(4) Saves the content of the temporary register (Note) within the CPU in the stack area.
(5) Saves the content of the program counter (PC) in the stack area.
(6) Sets the interrupt priority level of the accepted instruction in the IPL.
After the interrupt sequence is completed, the processor resumes executing instructions from the first
address of the interrupt routine.
Note: This register cannot be utilized by the user.
Interrupt Response Time
'Interrupt response time' is the period between the instant an interrupt occurs and the instant the first
instruction within the interrupt routine has been executed. This time comprises the period from the
occurrence of an interrupt to the completion of the instruction under execution at that moment (a) and the
time required for executing the interrupt sequence (b). Figure DD-4 shows the interrupt response time.
Instruction
Interrupt sequence
Instruction in
interrupt routine
Time
Interrupt response time
(a)
(b)
Interrupt request acknowledged
Interrupt request generated
(a) Time from interrupt request is generated to when the instruction then under execution is completed.
(b) Time in which the instruction sequence is executed.
Figure DD-4. Interrupt response time
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