参数资料
型号: MC68HC05P9DWR2
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 30/88页
文件大小: 6557K
代理商: MC68HC05P9DWR2
4
MC68HC05E0
MOTOROLA
4-3
RESETS, INTERRUPTS AND LOW POWER MODES
When the current instruction is complete, the processor checks all pending hardware interrupts. If
interrupts are not masked (CCR I bit clear), the processor proceeds with interrupt processing;
otherwise, the next instruction is fetched and executed.
Internal circuitry generates a processor interrupt signal IRQB if an interrupt occurs via either the
external interrupt pin INTX, the wake-up function on Port C, or a real time interrupt (see
Figure 4-2). The interrupting source can be determined by testing the state of the INTFX, WAKF
and RTIF ag bits.
Note:
Acknowledging an interrupt signal too early could have an effect on the BIH and BIL
command functions.
Figure 4-2 Internal Processor Interrupt Signal IRQB
Real Time Interrupt
RTIE
RTIF
Wake-up (Port C)
WAKF
IRQB
INTMX
INTXP
Pad
INTX
INTFX
39
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