参数资料
型号: MC68HC05C12ACB
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, PDIP42
封装: SHRINK, PLASTIC, DIP-42
文件页数: 86/156页
文件大小: 756K
代理商: MC68HC05C12ACB
MC68HC05C12A Rev. 3.0
General Release Specification
MOTOROLA
Interrupts
35
NON-DISCLOSURE
AGREEMENT
REQUIRED
General Release Specification — MC68HC05C12A
Section 4. Interrupts
4.1 Contents
4.2 Introduction
The MCU can be interrupted five different ways:
Four maskable hardware interrupts, IRQ (interrupt request), SPI
(serial peripheral interface), SCI (serial communications
interface), and timer
Non-maskable software interrupt instruction (SWI)
Port B interrupts, if enabled, are combined with the IRQ to form a single
interrupt source.
Interrupts cause the processor to save register contents on the stack
and to set the interrupt mask (I bit) to prevent additional interrupts. The
RTI (return to interrupt) instruction causes the register contents to be
recovered from the stack and normal processing to resume.
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