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參數(shù)資料
| 型號(hào)： | μPD70P083 |
| 廠商： | NEC Corp. |
| 英文描述： | 8 Bit Single Chip Microcontrollers(8位單片微控制器) |
| 中文描述： | 8位單片機(jī)微控制器（8位單片微控制器） |
| 文件頁數(shù)： | 26/56頁 |
| 文件大?。?/td> | 390K |
| 代理商： | ΜPD70P083 |
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26
m
PD78P083
5.
PROGRAM ERASURE (
μ
PD78P083DU ONLY)
The μPD78P083DU is capable of erasing (FFH) the data written in a program memory and rewriting.
To erase the programmed data, expose the erasure window to light having a wavelength shorter than about 400 nm.
Normally, irradiate ultraviolet rays of 254-nm wavelength. The amount of exposure required to completely erase the
programmed data is as follows:
UV intensity x erasing time
Erasure time: 40 min. or more (When a UV lamp of 12,000
m
W/cm
2
is used. However, a longer time may be needed
because of deterioration in performance of the UV lamp, soiled erasure window, etc.)
: 30 W
s/cm
2
or more
When erasing the contents of data, set up the UV lamp within 2.5 cm from the erasure window. Further, if a filter is provided
for a UV lamp, irradiate the ultraviolet rays after removing the filter.
6.
OPAQUE FILM ON ERASURE WINDOW (
μ
PD78P083DU ONLY)
To protect from unintentional erasure by rays other than that of the lamp for erasing EPROM contents, or to protect internal
circuit other than EPROM from misoperating by rays, cover the erasure window with an opaque film when EPROM contents
erasure is not performed.
7.
ONE-TIME PROM VERSION SCREENING
The one-time PROM version (μPD78P083CU, 78P083GB-3B4, 78P083GB-3BS-MTX) cannot be tested completely by
NEC before it is shipped, because of its structure. It is recommended to perform screening to verify PROM after writing
necessary data and performing high-temperature storage under the condition below.
Storage Temperature
Storage Time
125°C
24 hours
NEC offers for an additional fee one-time PROM writing to marking, screening, and verify for products designated as
"QTOP Microcontroller". Please contact an NEC sales representative for details.
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