參數(shù)資料
型號: MC68HC05G3
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 60/128頁
文件大?。?/td> 290K
代理商: MC68HC05G3
Page 27
Section 2: MODES OF OPERATION
MOTOROLA
MC68HC05G3 (705G4) Specification Rev. 1.1
SECTION 2
MODES OF OPERATION
2.1
GENERAL
The MC68HC05G3 has two operating modes: single-chip mode and self-check mode. In
the MC68HC705G4, the self-check mode becomes bootstrap mode.
The single-chip mode allows maximum use of pins for on-chip peripheral functions.
The self-check capability of MC68HC05G3 provides an internal check to determine if the
device is functional.
The bootstrap mode is provided for EPROM programming, dumping EPROM contents,
reading programs into the internal RAM, and executing it. This is a very versatile mode
because the special purpose program that is bootloaded into the internal RAM essentially
has no limitations.
2.2
MODE ENTRY
The mode entry is done at the rising edge of the RESET pin. Once the device enters one
of the three modes, the mode only can be changed by external reset not by software.
At the rising edge of the RESET pin, the device latches the states of IRQ1 and IRQ2 pins
and places itself in the specified mode. While the RESET pin is low, all pins are configured
as single-chip mode. The following table shows the states of IRQ1 and IRQ2 pins for each
mode.
Table 2-1: Mode Select Summary
MODE
RESET
IRQ1
IRQ2
SINGLE-CHIP MODE
L or H
X
SELF-CHECK/BOOTSTRAP
VTST
H
H= VDD
L
= GND
相關(guān)PDF資料
PDF描述
MC68HC705J5ACJP 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP16
MC68HC705J5ACP 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP20
MC68HC05J5AJDW 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO16
MC68HRC705J5ACDW 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO20
MC68HRC05J5ADW 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05J1 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HCMOS MICROCONTROLLER UNIT
MC68HC05J1A 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05J1ACDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05J1ACP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05J1ADW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers