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| 型号： | TS87C51RD2-MIMR |
| 英文描述： | Microcontroller |
| 中文描述： | 微控制器 |
| 文件页数： | 51/74页 |
| 文件大小： | 689K |
| 代理商： | TS87C51RD2-MIMR |
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Rev. C - 06 March, 2001
55
TS80C51RA2/RD2
TS83C51RB2/RC2/RD2
TS87C51RB2/RC2/RD2
Figure 19. Programming and Verification Signal’s Waveform
8.4. EPROM Erasure (Windowed Packages Only)
Erasing the EPROM erases the code array, the encryption array and the lock bits returning the parts to full
functionality.
Erasure leaves all the EPROM cells in a 1’s state (FF).
8.4.1. Erasure Characteristics
The recommended erasure procedure is exposure to ultraviolet light (at 2537 ) to an integrated dose at least 15
W-sec/cm2. Exposing the EPROM to an ultraviolet lamp of 12,000
W/cm2 rating for 30 minutes, at a distance
of about 25 mm, should be sufficient. An exposure of 1 hour is recommended with most of standard erasers.
Erasure of the EPROM begins to occur when the chip is exposed to light with wavelength shorter than approximately
4,000 . Since sunlight and fluorescent lighting have wavelengths in this range, exposure to these light sources
over an extended time (about 1 week in sunlight, or 3 years in room-level fluorescent lighting) could cause
inadvertent erasure. If an application subjects the device to this type of exposure, it is suggested that an opaque
label be placed over the window.
Control sig-
nals
Data In
ALE/PROG
A0-A12
Programming Cycle
100
s
D0-D7
EA/VPP
Data Out
Read/Verify Cycle
12.75V
5V
0V
相关PDF资料 |
PDF描述 |
|---|---|
| TS87C51RD2-VCER | Microcontroller |
| TS87C51RD2-VCMR | Microcontroller |
| TS87C51RD2-VIER | Microcontroller |
| TS87C51RD2-VIMR | Microcontroller |
| TS902C3 | 10 A, 300 V, SILICON, RECTIFIER DIODE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS87C51RD2S287-KCB | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller |
| TS87C51RD2S287-KCE | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller |
| TS87C51RD2S287-KCL | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller |
| TS87C51RD2S287-KCM | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller |
| TS87C51RD2S287-MCA | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller |
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