參數(shù)資料
型號： SC9RS08KA1J3CDB
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PDSO6
封裝： 3 X 3 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, DFN-6
文件頁數(shù)： 64/134頁
文件大小： 3114K
代理商： SC9RS08KA1J3CDB
SC9RS08KA2 Series Data Sheet, Rev. 1
Freescale Semiconductor
35
Chapter 5
Resets, Interrupts, and General System Control
5.1
Introduction
This chapter discusses basic reset and interrupt mechanisms and the various sources of reset and interrupt
in the SC9RS08KA2 Series. Some interrupt sources from peripheral modules are discussed in greater
detail within other chapters of this data sheet. This chapter gathers basic information about all reset and
interrupt sources in one place for easy reference. A few reset and wakeup sources, including the computer
operating properly (COP) watchdog and real-time interrupt (RTI), are not part of on-chip peripheral
systems with their own chapters but are part of the system control logic.
5.2
Features
Reset and interrupt features include:
Multiple sources of reset for flexible system configuration and reliable operation
System reset status register (SRS) to indicate the source of the most recent reset
System interrupt pending register (SIP1) to indicate the status of pending system interrupts
— Analog comparator interrupt with enable
— Keyboard interrupt with enable
— Low-voltage detect interrupt with enable
— Modulo timer interrupt with enable
— Real-time interrupt with enable; available in stop with multiple rates based on a separate 1-kHz
self-clocked source
5.3
MCU Reset
Resetting the MCU provides a way to start processing from a known set of initial conditions. During reset,
most control and status registers are forced to initial values and the program counter is started from
location $3FFD. A JMP instruction (opcode $BC) with operand located at $3FFE–$3FFF must be
programmed into the user application for correct reset operation. The operand defines the location at which
the user program will start. On-chip peripheral modules are disabled and I/O pins are initially configured
as general-purpose high-impedance inputs with pullup/pulldown devices disabled.
The SC9RS08KA2 Series has seven sources for reset:
External pin reset (PIN) — enabled using RSTPE in SOPT
Power-on reset (POR)
Low-voltage detect (LVD)
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參數(shù)描述
SC9RS08KA1J3CPC 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RS08 Microcontrollers
SC9RS08KA1J3CSC 制造商:Freescale Semiconductor 功能描述:8-BIT RS08 CISC 1KB FLASH 2.5V/3.3V/5V 8-PIN SOIC N RAIL - Rail/Tube 制造商:Freescale Semiconductor 功能描述:1K FLASH W/ ACMP 62 RAM
SC9RS08KA2 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RS08 Microcontrollers
SC9RS08KA2J3CDB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RS08 Microcontrollers
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