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| 型號： | ST62E40B |
| 廠商： | 意法半導體 |
| 元件分類： | DRAM |
| 英文描述： | The CAT24FC02 is a 2-kb Serial CMOS EEPROM internally organized as 256 words of 8 bits each |
| 中文描述： | 該CAT24FC02是一個2 KB的EEPROM的國內(nèi)256個8位每字舉辦的串行CMOS |
| 文件頁數(shù)： | 15/72頁 |
| 文件大?。?/td> | 445K |
| 代理商： | ST62E40B |
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ST62T40B/E40B
1.4 PROGRAMMING MODES
1.4.1 Option Byte
The Option Byte allows configuration capability to
the MCUs. Option byte’s content is automatically
read, and the selected options enabled, when the
chip reset is activated.
It can only be accessed during the programming
mode. This access is made either automatically
(copy from a master device) or by selecting the
OPTION BYTEPROGRAMMING modeof the pro-
grammer.
The option byte is located in a non-user map. No
address has to be specified.
EPROM Code Option Byte
Bit 7. Reserved.
Bit 6 =
NMI PULL
.
.
This bit must be set high to re-
move theNMI pin pull upresistor. When it is low, a
pull up is provided.
Bit 5 =
PROTECT
. This bit allows the protection of
the software contents against piracy. When the bit
PROTECT is set high, readout of the OTP con-
tents is prevented by hardware. No programming
equipment is able to gain access to the user pro-
gram. When this bit is low, the user program can
be read.
Bit 4. Reserved.
Bit 3 =
WDACT
. This bit controls the watchdog ac-
tivation. When it is high, hardware activation is se-
lected. The software activation is selected when
WDACT is low.
Bit 2 =
TIM PULL.
This bit must be set high to con-
figure the TIM pin with a pull up resistor when it is
low, no pull up is provided.
Bit 1-0 = Reserved.
The Option byte is written during programming ei-
ther by using the PC menu (PC driven Mode) or
automatically (stand-alone mode)
1.4.2 Program Memory
EPROM/OTP programming mode is set by a
+12.5V voltage applied to the TEST/V
PP
pin. The
programming flow of the ST62T40B/E40B is de-
scribed in the User Manual of the EPROM Pro-
gramming Board.
The
ST62E4xB EPROM programming tools available
from STMicroelectronics.
1.4.3 EEPROM Data Memory
MCUs
can
be
programmed
with
the
EEPROM data pages are supplied in the virgin
state FFh. Partial or total programming of EEP-
ROM data memory can be performed either
through the application software, or through an ex-
ternal programmer. Any STMicroelectronics tool
used for the program memory (OTP/EPROM) can
also be used to program the EEPROM data mem-
ory.
1.4.4 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 unintentionalerasure 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 integrateddose (i.e. U.V. intensity x exposure
time) for erasure should be a minimum of 15W-
sec/cm
2
. The erasure time with this dosage is ap-
proximately 15 to 20 minutes using an ultraviolet
lamp with
12000
μ
W/cm
2
ST62E40B should be placed within 2.5cm (1Inch)
of the lamp tubes during erasure.
power
rating. The
7
0
-
NMI
PULL
PRO-
TECT
-
WDACT
TIM
PULL
-
-
相關PDF資料 |
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| ST62T40B | The CAT24FC02 is a 2-kb Serial CMOS EEPROM internally organized as 256 words of 8 bits each |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ST62E40BG1 | 功能描述:8位微控制器 -MCU UV EPROM 8K SPI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| ST62E40C | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GANG PROGRAMMERS FOR ST62 MCU FAMILY |
| ST62E40G1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| ST62E42 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GANG PROGRAMMERS FOR ST62 MCU FAMILY |
| ST62E42B | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER |
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