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參數(shù)資料
| 型號(hào)： | ST6388 |
| 廠(chǎng)商： | 意法半導(dǎo)體 |
| 英文描述： | 8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| 中文描述： | 8位微控制器對(duì)屏幕，電視調(diào)諧顯示器 |
| 文件頁(yè)數(shù)： | 77/82頁(yè) |
| 文件大?。?/td> | 718K |
| 代理商： | ST6388 |
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ST63E88,ST63T88, ST63E89,ST63T89
1.2 EPROM/OTP DESCRIPTION
The ST63E88 and ST63E89 are the EPROM ver-
sion of the ST6380, 82, 88 and ST6381, 83, 89
ROM products. They are intended for use during
the development of an application, and for pre-pro-
duction and small volume production. The
ST63T88 and ST63T89 OTPs have the same
characteristics. They both include EPROM memo-
ry instead of the ROM memory of the ST6388, 89,
and so the program and constants of the program
can be easily modified by the user with the
ST63E8x EPROM programming board from STMi-
croelectronics.
The EPROM OPTION BYTE is programmed by
the EPROM programming board and its associat-
ed software.
The EPROM Option Byte content will define the
OSD options as follows:
b7-2: Not used.
Opt 1: This option bit disconnect the Schmitt trig-
ger of PC7 and PB0 to prevent some electro-mag-
netic problems when these pads are not bonded.
-”0”: Schmitt triggers are connected to I/O’s inputs.
-”1”: Schmitt triggers are disconnected from I/O’s
inputs.
Opt 0: This option bit enables or disables the Pow-
er On/Off Reset.
-”0”: The Power On/Off Reset is enabled.
-”1”: The Power On/Off Reset is disabled.
From a user point of view (with the following ex-
ceptions) the ST63E8x,T8x products have exactly
the same software and hardware features of the
ROM version. An additional mode is used to con-
figure the part for programming of the EPROM,
this is set by a +12.5V voltage applied to the
TEST/VPP pin. The programming of the
ST63E8x,T8x is described in the User Manual of
the EPROM Programming board.
On the ST63E88, 89, all the 20140 bytes of PRO-
GRAM memory are available for the user, as all
the EPROM memory can be erased by exposure
to UV light. On the ST63T88, 89 (OTP device) a
reserved area for test purposes exists, as for the
ST6388, 89 ROM device. In order to avoid any dis-
crepancy between program functionality when us-
ing the EPROM, OTP and ROM it is recommend-
ed NOT TO USE THESE RESERVED AREAS,
even when using the ST63E88, 89. The Table 4
on page 10 is a summary of the EPROM/ROM
Map and its reserved area.
THE READER IS ASKED TO REFER TO THE
DATASHEET OF THE ST638x ROM-BASED DE-
VICE FOR FURTHER DETAILS.
1.3 EPROM ERASING
The EPROM of the windowed package of the
ST63E8, 89 may be erased by exposure to Ultra
Violet light.
The erasure characteristic of the ST63E88, 89
EPROM is such that erasure begins when the
memory is exposed to light with wave lengths
shorter than approximately 4000. It should be
noted that sunlight and some types of fluorescent
lamps have wavelengths in the range 3000-
4000. It is thus recommended that the window of
the ST63E88, 89 package be covered by an
opaque label to prevent unintentional erasure
problems when testing the application in such an
environment.The recommended erasure proce-
dure of the ST63E88, 89 EPROM is exposure to
short wave ultraviolet light which has wavelength
2537. The integrated dose (i.e. UV intensity x ex-
posure time) for erasure should be a minimum of
15 W-sec/cm2. The erasure time with this dosage
is approximately 15 to 20 minutes using an ultravi-
olet lamp with 12000mW/cm2 power rating. The
ST63E88, 89 should be placed within 2.5cm (1
inch) of the lamp tubes during erasure.
7
0
-
-
-
-
-
-
Opt 1
Opt 0
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