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参数资料
| 型号： | M30610SAGP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, 10 MHz, MICROCONTROLLER, PQFP100 |
| 封装： | 14 X 14 MM, 0.50 MM PITCH, PLASTIC, LQFP-100 |
| 文件页数： | 151/197页 |
| 文件大小： | 2673K |
| 代理商： | M30610SAGP |
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Precautions for Interrupts
Mitsubishi microcomputers
M16C / 61 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
57
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. When using the NMI interrupt, initialize the stack point
at the beginning of a program. Concerning the first instruction immediately after reset, generating any
_______
interrupts including the NMI interrupt is prohibited.
_______
(3) The NMI interrupt
_______
As for the NMI interrupt pin, an interrupt cannot be disabled. Connect it to the VCC pin via a resistor
(pull-up) if unused. Be sure to work on it.
_______
The NMI pin also serves as P85, which is exclusively input. Reading the contents of the P8 register
allows reading the pin value. Use the reading of this pin only for establishing the pin level at the time
_______
when the NMI interrupt is input.
_______
Do not reset the CPU with the input to the NMI pin being in the “L” state.
_______
Do not attempt to go into stop mode with the input to the NMI pin being in the “L” state. With the input to
_______
the NMI being in the “L” state, the CM10 is fixed to “0”, so attempting to go into stop mode is turned
down.
_______
Do not attempt to go into wait mode with the input to the NMI pin being in the “L” state. With the input to
_______
the NMI pin being in the “L” state, the CPU stops but the oscillation does not stop, so no power is saved.
In this instance, the CPU is returned to the normal state by a later interrupt.
_______
Signals input to the NMI pin require an "L" level of 1 clock or more, from the operation clock of the CPU.
(4) 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 INT2 regardless of the CPU operation clock.
________
When the polarity of the INT0 to INT2 pins is changed, the interrupt request bit is sometimes set to "1".
After changing the polarity, set the interrupt request bit to "0". Figure 1.13.12 shows the procedure for
______
changing the INT interrupt generate factor.
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相关代理商/技术参数 |
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| M30612E4 | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30612E4FP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30612E4GP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30612M4-152FP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30612M4-155FP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
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