参数资料
型号: MC68HC05RC9P
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, PDIP28
封装: PLASTIC, DIP-28
文件页数: 63/124页
文件大小: 457K
代理商: MC68HC05RC9P
Interrupts
Hardware Interrupts
MC68HC05RC18 Rev. 2.0
General Release Specification
MOTOROLA
Interrupts
43
NON-DISCLOSURE
AGREEMENT
REQUIRED
4.6 Hardware Interrupts
All hardware interrupts except RESET are maskable by the I bit in the
CCR. If the I bit is set, all hardware interrupts (internal and external) are
disabled. Clearing the I bit enables the hardware interrupts.
The three types of hardware interrupts, which are explained in the
following sections, are:
1. External interrupt
2. Core timer interrupt
3. Carrier modulator transmitter interrupt
4.6.1 External Interrupt (IRQ/Port B Keyscan)
The IRQ pin provides an asynchronous interrupt to the CPU. A block
diagram of the IRQ function is shown in Figure 4-2.
NOTE:
The BIH and BIL instructions will apply to the level on the IRQ pin itself
and to the output of the logic OR function with the port B IRQ interrupts.
The states of the individual port B pins can be checked by reading the
appropriate port B pins as inputs.
Figure 4-2. IRQ Function Block Diagram
IRQ
LATCH
R
IRQ PIN
LEVEL
(MASK OPTION)
TO IRQ
PROCESSING
IN CPU
PORT B
TO BIH & BIL
INSTRUCTION
SENSING
IRQ CLEAR
VDD
EIMSK
相关PDF资料
PDF描述
MC68008L12D 16-BIT, 12.5 MHz, MICROPROCESSOR, CDIP48
MDDFMM-TTL-16J 16 MHz, OTHER CLOCK GENERATOR, PDSO4
MDDFMM-TTL-2F 2 MHz, OTHER CLOCK GENERATOR, PDIP4
MC68010P12F 32-BIT, 16.67 MHz, MICROPROCESSOR, PDIP64
MC68EC000FU12F 32-BIT, 16.67 MHz, MICROPROCESSOR, PQFP64
相关代理商/技术参数
参数描述
MC68HC05SC24 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:Secure 8-bit microcomputer with EEPROM
MC68HC05SR3 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller Units
MC68HC05SU3A 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Fully static chip design featuring the industry standard 8-bit M68HC05 core
MC68HC05T16 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit
MC68HC05V12 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontreller Unit