- 您现在的位置：买卖IC网 > PDF目录69027 > MC68HC05SR3FB (FREESCALE SEMICONDUCTOR INC) 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP44 PDF资料下载
参数资料
| 型号： | MC68HC05SR3FB |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | QFP-44 |
| 文件页数： | 71/96页 |
| 文件大小： | 3143K |
| 代理商： | MC68HC05SR3FB |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页当前第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页
MC68HC05SR3
Freescale
10-1
OPERATING MODES
10
OPERATING MODES
The MC68HC05SR3/MC68HC705SR3 has two modes of operation: the User Mode and the
Self-Check/Bootstrap Mode. Table 10-1 shows the conditions required for entering the two
operating modes.
10.1
User Mode
The normal operating mode of the MC68HC05SR3/MC68HC705SR3 is the User mode. This
mode is entered on the rising edge of RESET when the VPP and PB1 pins are between VSS and
VDD.
10.2
Self-Check Mode
The Self-check mode is provided on the MC68HC05SR3 for the user to check device functions
with an on-chip self-check program masked at location $1F00 to $1FEF under minimum hardware
support. The self-check schematic is shown in Figure 10-1. Self-check mode is 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
self-check mode, PB1 can then be used for other purposes. After entering the self-check mode,
CPU branches to the self-check program and carries out the self-check. Self-check is a repetitive
test, i.e. if all parts are checked to be good, the CPU will repeat the self-check again. Therefore,
the LEDs attached to Port A will be flashing if the device is good; else the combination of LEDs’
on-off pattern can show what part of the device is suspected to be bad. Table 10-2 lists the LEDs’
on-off patterns and their corresponding indications.
Table 10-1 Mode Selection
RESET
VPP
PB1
MODE
VSS to VDD
USER
VTST
VDD
SELF-CHECK/BOOTSTRAP
VTST=2×VDD
5V
TPG
71
05SR3.Book Page 1 Thursday, August 4, 2005 1:08 PM
相关PDF资料 |
PDF描述 |
|---|---|
| MC68HC05SR3CFB | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP44 |
| MC68HC05T7B | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56 |
| MC68HC05V12CFNR2 | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC68 |
| MC68HC08AS20FNR2 | 8-BIT, MROM, MICROCONTROLLER, PQCC52 |
| MC68HC08AS20VFNR2 | 8-BIT, MROM, MICROCONTROLLER, PQCC52 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MC68HC05V12CFN | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:General Release Specification |
| MC68HC05X16 | 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 |
发布紧急采购，3分钟左右您将得到回复。