参数资料
型号: MC9S12D32VFUE
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, PQFP80
封装: PLASTIC, QFP-80
文件页数: 97/128页
文件大小: 1835K
代理商: MC9S12D32VFUE
MC9S12DJ64 Device User Guide — V01.20
70
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,
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.
0
Pierce Oscillator/external clock selected
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
Table 4-2 Clock Selection Based on PE7
PE7 = XCLKS
Description
相关PDF资料
PDF描述
MB88154APNF-G-102-JNEFE1 67 MHz, OTHER CLOCK GENERATOR, PDSO8
MB88154APNF-G-113-JNE1 40 MHz, OTHER CLOCK GENERATOR, PDSO8
MSP430F233TPMR 16-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PQFP64
MPC8544DVTANG 32-BIT, 400 MHz, MICROPROCESSOR, PBGA783
MC9S12XF128J0VLM MICROCONTROLLER, PQFP112
相关代理商/技术参数
参数描述
MC9S12D64CFU 功能描述:IC MCU 64K FLASH 25MHZ 80-QFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HCS12 标准包装:250 系列:56F8xxx 核心处理器:56800E 芯体尺寸:16-位 速度:60MHz 连通性:CAN,SCI,SPI 外围设备:POR,PWM,温度传感器,WDT 输入/输出数:21 程序存储器容量:40KB(20K x 16) 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:6K x 16 电压 - 电源 (Vcc/Vdd):2.25 V ~ 3.6 V 数据转换器:A/D 6x12b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:48-LQFP 包装:托盘 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
MC9S12D64CFUE 功能描述:16位微控制器 - MCU 64K FLASH HCS12 MCU RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
MC9S12D64CFUER 功能描述:16位微控制器 - MCU 64K FLASH 9S12 MCU TORPE RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
MC9S12D64CPVE 功能描述:16位微控制器 - MCU 64K FLASH HCS12 MCU RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
MC9S12D64MFU 功能描述:IC MCU 64K FLASH 25MHZ 80-QFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HCS12 标准包装:250 系列:56F8xxx 核心处理器:56800E 芯体尺寸:16-位 速度:60MHz 连通性:CAN,SCI,SPI 外围设备:POR,PWM,温度传感器,WDT 输入/输出数:21 程序存储器容量:40KB(20K x 16) 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:6K x 16 电压 - 电源 (Vcc/Vdd):2.25 V ~ 3.6 V 数据转换器:A/D 6x12b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:48-LQFP 包装:托盘 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323