- 您现在的位置：买卖IC网 > PDF目录85256 > SC515846CPV (FREESCALE SEMICONDUCTOR INC) 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112 PDF资料下载
参数资料
| 型号： | SC515846CPV |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112 |
| 封装： | LQFP-112 |
| 文件页数： | 119/142页 |
| 文件大小： | 6464K |
| 代理商： | SC515846CPV |
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页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页当前第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页
Device User Guide — 9S12DT128DGV2/D V02.15
78
Freescale Semiconductor
4.3 Security
The device will make available a security feature preventing the unauthorized read and write of the
memory contents. This feature allows:
Protection of the contents of FLASH,
Protection of the contents of EEPROM,
Operation in single-chip mode, No BDM possible
Operation from external memory with internal FLASH and EEPROM disabled.
The user must be reminded that part of the security must lie with the user’s code. An extreme example
would be user’s code that dumps the contents of the internal program. This code would defeat the purpose
of security. At the same time the user may also wish to put a back door in the user’s program. An example
of this is the user downloads a key through the SCI which allows access to a programming routine that
updates parameters stored in EEPROM.
4.3.1 Securing the Microcontroller
Once the user has programmed the FLASH and EEPROM (if desired), the part can be secured by
programming the security bits located in the FLASH module. These non-volatile bits will keep the part
secured through resetting the part and through powering down the part.
The security byte resides in a portion of the Flash array.
Check the Flash Block User Guide for more details on the security configuration.
4.3.2 Operation of the Secured Microcontroller
4.3.2.1 Normal Single Chip Mode
This will be the most common usage of the secured part. Everything will appear the same as if the part was
not secured with the exception of BDM operation. The BDM operation will be blocked.
4.3.2.2 Executing from External Memory
The user may wish to execute from external space with a secured microcontroller. This is accomplished
by resetting directly into expanded mode. The internal FLASH and EEPROM will be disabled. BDM
operations will be blocked.
Table 4-3 Voltage Regulator VREGEN
VREGEN
Description
1
Internal Voltage Regulator enabled
0
Internal Voltage Regulator disabled, VDD1,2 and
VDDPLL must be supplied externally with 2.5V
相关PDF资料 |
PDF描述 |
|---|---|
| S3S12HN64J3CAA | 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP80 |
| S3S12HN64J3VAA | 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP80 |
| SC103335VR400B | 32-BIT, 400 MHz, MICROPROCESSOR, PBGA272 |
| SAH-XC2265N-40F40L | 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP100 |
| SCN8032HCFA44 | 8-BIT, 7.5 MHz, MICROCONTROLLER, PQCC44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SC515847 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:MC9S12DT128 Device User Guide V02.09 |
| SC515848 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Device User Guide |
| SC515849 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:MC9S12DT128 Device User Guide V02.09 |
| SC516/WH | 制造商:CQR Security 功能描述:REED AND MAGNET HOUSING |
| SC51601FBR2 | 制造商:Motorola Inc 功能描述: |
发布紧急采购，3分钟左右您将得到回复。