参数资料
型号: ST62P65CM3/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO28
封装: 0.300 INCH, PLASTIC, SOP-28
文件页数: 7/86页
文件大小: 970K
代理商: ST62P65CM3/XXX
15/86
ST62T55C ST62T65C/E65C
PROGRAMMING MODES (Cont’d)
1.4.2 EPROM Erasing
The EPROM of the windowed package of the
MCUs may be erased by exposure to Ultra Violet
light. The erasure characteristic of the MCUs is
such that erasure begins when the memory is ex-
posed to light with a wave lengths shorter than ap-
proximately 4000. It should be noted that sun-
lights and some types of fluorescent lamps have
wavelengths in the range 3000-4000.
It is thus recommended that the window of the
MCUs packages be covered by an opaque label to
prevent unintentional erasure problems when test-
ing the application in such an environment.
The recommended erasure procedure of the
MCUs EPROM is the exposure to short wave ul-
traviolet light which have a wave-length 2537A.
The integrated dose (i.e. U.V. intensity x exposure
time) for erasure should be a minimum of 15W-
sec/cm2. The erasure time with this dosage is ap-
proximately 15 to 20 minutes using an ultraviolet
lamp
with
12000W/cm2
power
rating. The
ST62E65C should be placed within 2.5cm (1Inch)
of the lamp tubes during erasure.
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