参数资料
型号: MB89T635P-SH
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 10 MHz, MICROCONTROLLER, PDIP64
封装: SHRINK, DIP-64
文件页数: 15/153页
文件大小: 7326K
代理商: MB89T635P-SH
MB89630 SERIES HARDWARE MANUAL
2-88
[Bit 5] SEL3: Edge-polarity select bit
Bit 5 is used to control the input edge polarity of the INT3 pin.
[Bit 4] EIE3: Interrupt-enable bit
Bit 4 is used to enable an external-interrupt request by the INT3 pin.
[Bit 3] EIR2: External-interrupt request flag
When the edge specified by the SEL2 bit is input to the INT2 pin, bit 3 is set to 1. When the EIE2 is 1,
an interrupt request (IRQ2) is output if this bit is set.
The meaning of each bit to be read is as follows:
1 is always read when the Read Modify Write instruction is read.
The meaning of each bit to be written is as follows:
[Bit 1] SEL2: Edge-polarity select bit
Bit 1 is used to control the input edge polarity of the INT2 pin.
[Bit 0] EIE2: Interrupt-enable bit
Bit 0 is used to enable an external-interrupt request by the INT2 pin.
(4) Precautions for external-interrupt circuit
When enabling an interrupt after clearing reset, always clear the interrupt flag simultaneously. An interrupt
request is output immediately when the interrupt flags (EIR3, EIR2, EIR1, EIR0) are set to 1.
Don't use INT0 and INT1 when double clock operation is specified.
If an interrupt is selected on the rising edge, the pull-up option for the pin should not be used.
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