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参数资料
| 型号： | S80C31BH |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, 12 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | QFP-44 |
| 文件页数： | 11/21页 |
| 文件大小： | 2233K |
| 代理商： | S80C31BH |
87C51/80C51BH/80C31BH
Program Lock Bits
The 87C51 has 3 programmable lock bits that when
programmed according to Table 5 will provide differ-
ent levels of protection for the on-chip code and
data.
Erasing the EPROM also erases the encryption ar-
ray and the program lock bits, returning the part to
full functionality.
Reading the Signature Bytes
The 87C51 and 80C51BH have 3 signature bytes in
locations 30H, 31H, and 60H. To read these bytes
follow the procedure for EPROM verify, but activate
the control lines provided in Table 4 for Read Signa-
ture Byte.
Location
Device
Contents
30H
All
89H
31H
All
58H
60H
87C51
51H
80C51BH
11H
Erasure Characteristics
(Windowed Devices Only)
Erasure of the EPROM begins to occur when the
chip is exposed to light with wavelengths shorter
than approximately 4,000 Angstroms. Since sunlight
and fluorescent lighting have wavelengths in this
range, exposure to these light sources over an ex-
tended time (about 1 week in sunlight, or 3 years in
room level fluorescent lighting) could cause inadver-
tent erasure. If an application subjects the device to
this type of exposure, it is suggested that an opaque
label be placed over the window.
The recommended erasure procedure is exposure
to ultraviolet light (at 2537 Angstroms) to an integrat-
ed dose of at least 15 W-sec/cm 2. Exposing the
EPROM to an ultraviolet lamp of 12,000 mW/cm 2
rating for 30 minutes, at a distance of about 1 inch,
should be sufficient.
Erasure leaves the array in an all 1's state.
Table 5. Program Lock Bits and the Features
Program Lock Bits
Protection Type
LB1
LB2
LB3
1
U
No program lock features enabled. (Code verify will still be encrypted by the
encryption array if programmed.)
2
P
U
MOVC instructions executed from external program memory are disabled from
fetching code bytes from internal memory, EA is sampled and latched on
reset, and further programming of the EPROM is disabled.
3
P
U
Same as 2, also verify is disabled.
4
P
Same as 3, also external execution is disabled.
19
相关PDF资料 |
PDF描述 |
|---|---|
| S80C51BHP-1 | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44 |
| S80C51BH | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP44 |
| S87C51BH-2 | 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PQFP44 |
| MD80C86/883 | 16-BIT, 5 MHz, MICROPROCESSOR, CDIP40 |
| MR80C86-2/883 | 16-BIT, 8 MHz, MICROPROCESSOR, CQCC44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| S80C31BH-1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| S80C31BH1SF88 | 功能描述:IC MPU 8-BIT 5V 16MHZ 44-MQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:80C 其它有关文件:STM32F101T8 View All Specifications 特色产品:STM32 32-bit Cortex MCUs 标准包装:490 系列:STM32 F1 核心处理器:ARM? Cortex?-M3 芯体尺寸:32-位 速度:36MHz 连通性:I²C，IrDA，LIN，SPI，UART/USART 外围设备:DMA，PDR，POR，PVD，PWM，温度传感器，WDT 输入/输出数:26 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):2 V ~ 3.6 V 数据转换器:A/D 10x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:36-VFQFN，36-VFQFPN 包装:托盘 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名称:497-9032STM32F101T8U6-ND |
| S80C31BH-24 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| S80C31BH24SF88 | 功能描述:IC MPU 8-BIT 5V 24MHZ 44-QFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:80C 其它有关文件:STM32F101T8 View All Specifications 特色产品:STM32 32-bit Cortex MCUs 标准包装:490 系列:STM32 F1 核心处理器:ARM? Cortex?-M3 芯体尺寸:32-位 速度:36MHz 连通性:I²C，IrDA，LIN，SPI，UART/USART 外围设备:DMA，PDR，POR，PVD，PWM，温度传感器，WDT 输入/输出数:26 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):2 V ~ 3.6 V 数据转换器:A/D 10x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:36-VFQFN，36-VFQFPN 包装:托盘 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名称:497-9032STM32F101T8U6-ND |
| S80C31-L16 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
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