參數(shù)資料
型號: MC68HC05C0B
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, 4 MHz, MICROCONTROLLER, PDIP42
封裝: SDIP-42
文件頁數(shù): 41/96頁
文件大?。?/td> 357K
代理商: MC68HC05C0B
Section 8: System Configuration
MOTOROLA
Page 37
MC68HC05C0 Specification Rev. 1.2
or WAIT instructions causes the IRQEN bit to be set in order to allow the external IRQ to
exit these modes.
8.4.7
IRQA - Interrupt ReQuest Acknowledge
Writing a logic one to the IRQA bit clears the IRQ latch. If IRQEL is zero, IRQF will be
cleared as well. This allows a pending IRQ interrupt and/or flag to be cleared without having
to enter the IRQ service routine. Writing a zero has no effect. This bit always reads as zero.
8.4.8
IRQEL - Interrupt ReQuest Edge/Level
A logic one indicates edge and level sensitive triggering for the IRQ interrupt; a logic zero
indicates negative-edge triggering only. This bit is one-time writable between resets; in
order to write a new value, the part must first be externally reset.
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