- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄369944 > P87C511 (Intel Corp.) CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER PDF資料下載
參數(shù)資料
| 型號： | P87C511 |
| 廠商： | Intel Corp. |
| 英文描述： | CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER |
| 中文描述： | CHMOS單片8位微控制器 |
| 文件頁數(shù)： | 19/21頁 |
| 文件大?。?/td> | 284K |
| 代理商： | P87C511 |
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
m
W/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
U
U
No program lock features enabled. (Code verify will still be encrypted by the
encryption array if programmed.)
2
P
U
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
P
U
Same as 2, also verify is disabled.
4
P
P
P
Same as 3, also external execution is disabled.
19
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| P87LPC759 | Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP |
| P87LPC759BN | Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP |
| P89C738 | 8-bit Flash microcontrollers |
| P89C739ABA | 8-bit Flash microcontrollers |
| P89C739ABB | 8-bit Flash microcontrollers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P87C51-1 | 制造商:. 功能描述: |
| P87C511 S F76 | 制造商:Intel 功能描述:MCU 8-bit MCS51 80C51 CISC 4KB EPROM 5V 40-Pin PDIP |
| P87C511SF76 | 功能描述:IC MCU 8BIT 5V 16MHZ OTP 40DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:87C 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設(shè)備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 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... 其它名稱:497-9032STM32F101T8U6-ND |
| P87C51-24 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| P87C5124 S F76 | 制造商:Intel 功能描述:MCU 8-bit MCS51 80C51 CISC 4KB EPROM 5V 40-Pin PDIP |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。