參數(shù)資料
型號(hào)： MC68HC05SR3FB
廠(chǎng)商： MOTOROLA INC
元件分類(lèi)： 微控制器/微處理器
英文描述： 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP44
封裝： QFP-44
文件頁(yè)數(shù)： 87/96頁(yè)
文件大?。?/td> 612K
代理商： MC68HC05SR3FB
MOTOROLA
A-2
MC68HC05SR3
MC68HC705SR3
A
A.2
Modes of Operation
The MC68HC705SR3 has two modes of operation – user mode and EPROM bootstrap mode.
Table A-1 shows the conditions required to enter each mode on the rising edge of RESET.
A.3
User Mode
The normal operating mode of the MC68HC705SR3 is the user mode. User mode will be entered
on the rising edge of RESET when the VPP and PB1 pins are between VSS and VDD.
Warning: In the MC68HC705SR3, all vectors are fetched from EPROM in user mode; therefore,
the EPROM must be programmed (via the bootstrap mode) before the device is
powered up in user mode.
A.4
Bootstrap Mode
The bootstrap mode is provided as a mean of self-programming MC68HC705SR3 EPROM with
minimal circuitry, and can only run in the crystal oscillator mode. Bootstrap mode will be entered
on the rising edge of RESET when the VPP pin is at VTST (2×VDD) and PB1 pin is at VDD. Once in
the bootstrap mode, PB1 can then be used for other purposes. After entering the bootstrap mode,
CPU branches to the bootstrap program and carries out the EPROM programming routine. The
user EPROM consists of 3840 bytes, from location $1000 to $1EFF.
This program handles copying of user code from an external EPROM into the on-chip EPROM.
The bootstrap function does not have to be done from an external EPROM, but it may be done
from a host.
The user code must be a one-to-one correspondence with the internal EPROM addresses.
Table A-1 MC68HC705SR3 Operating Mode Entry Conditions
RESET
VPP
PB1
MODE
VSS to VDD
USER
VTST
VDD
BOOTSTRAP
VTST=2×VDD
5V
TPG
86
相關(guān)PDF資料
PDF描述
MC68HC05SR3P 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP40
MC68HC705SR3CFB 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQFP44
MC68HC05SU3AP 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP40
MC68HC05SU3AFB 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP44
MC68HC05SU3AB 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP42
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05SU3A 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:Fully static chip design featuring the industry standard 8-bit M68HC05 core
MC68HC05T16 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit
MC68HC05V12 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:HCMOS Microcontreller Unit
MC68HC05V12CFN 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:General Release Specification
MC68HC05X16 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor HCMOS) microcontroller unit
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠(chǎng)商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*