參數(shù)資料
型號(hào)： TS87C52X2-VIJB
英文描述： 8-bit CMOS Microcontroller 0-60 MHz
中文描述： 8位CMOS微控制器0-60兆赫
文件頁(yè)數(shù)： 37/54頁(yè)
文件大小： 626K
代理商： TS87C52X2-VIJB
Rev. B - Jan. 25, 1999
37
Preliminary
TS80C52X2
The encryption array cannot be directly verified. Verification of the encryption array is done by observing that the
code array is well encrypted.
Figure 12. 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/cm
2
. Exposing the EPROM to an ultraviolet lamp of 12,000
μ
W/cm
2
rating for 30 minutes, at a distance
of about 25 mm, should be sufficient.
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 signals
Data In
ALE/PROG
A0-A12
Programming Cycle
100
μ
s
D0-D7
EA/VPP
Data Out
Read/Verify Cycle
12.75V
5V
0V
相關(guān)PDF資料
PDF描述
TS87C52X2-VIJD 8-bit CMOS Microcontroller 0-60 MHz
TS87C52X2-VIJR 8-bit CMOS Microcontroller 0-60 MHz
TS87C52X2-VIBB 8-bit CMOS Microcontroller 0-60 MHz
TS87C52X2-VIBD 8-bit CMOS Microcontroller 0-60 MHz
TS87C52X2-VIBR 8-bit CMOS Microcontroller 0-60 MHz
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS87C52X2-VIJD 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz
TS87C52X2-VIJR 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz
TS87C52X2-VIKB 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz
TS87C52X2-VIKD 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz
TS87C52X2-VIKR 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz
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