数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

N80C58-2 数据表(PDF) 21 Page - Intel Corporation

部件名 N80C58-2
功能描述  CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
Download  23 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  INTEL [Intel Corporation]
网页  http://www.intel.com
标志 INTEL - Intel Corporation

N80C58-2 数据表(HTML) 21 Page - Intel Corporation

Back Button N80C58-2 Datasheet HTML 15Page - Intel Corporation N80C58-2 Datasheet HTML 16Page - Intel Corporation N80C58-2 Datasheet HTML 17Page - Intel Corporation N80C58-2 Datasheet HTML 18Page - Intel Corporation N80C58-2 Datasheet HTML 19Page - Intel Corporation N80C58-2 Datasheet HTML 20Page - Intel Corporation N80C58-2 Datasheet HTML 21Page - Intel Corporation N80C58-2 Datasheet HTML 22Page - Intel Corporation N80C58-2 Datasheet HTML 23Page - Intel Corporation  
Zoom Inzoom in Zoom Outzoom out
 21 / 23 page
background image
8XC525458
ROM and EPROM Lock System
The program lock system when programmed pro-
tects the onboard program against software piracy
The 80C5X has a one-level program lock system
and a 64-byte encryption table See line 2 of Table
5 If program protection is desired the user submits
the encryption table with their code and both the
lock-bit and encryption array are programmed by the
factory The encryption array is not available without
the lock bit For the lock bit to be programmed the
user must submit an encryption table
The 87C5X has a 3-level program lock system and a
64-byte encryption array Since this is an EPROM
device all locations are user-programmable See
Table 5
Encryption Array
Within the EPROM array are 64 bytes of Encryption
Array that are initially unprogrammed (all 1’s) Every
time that a byte is addressed during a verify 6 ad-
dress lines are used to select a byte of the Encryp-
tion Array
This byte is then exclusive-NOR’ed
(XNOR) with the code byte creating an Encryption
Verify byte The algorithm with the array in the un-
programmed state (all 1’s) will return the code in its
original unmodified form For programming the En-
cryption Array refer to Table 4 (Programming the
EPROM)
When using the encryption array one important fac-
tor needs to be considered If a code byte has the
value 0FFH verifying the byte will produce the en-
cryption byte value If a large block (l64 bytes) of
code is left unprogrammed a verification routine will
display the contents of the encryption array For this
reason all unused code bytes should be pro-
grammed with some value other than 0FFH and not
all of them the same value This will ensure maxi-
mum program protection
Program Lock Bits
The 87C5X has 3 programmable lock bits that when
programmed according to Table 5 will provide differ-
ent levels of protection for the on-chip code and
data
Erasing the EPROM also erases the encryption ar-
ray and the program lock bits returning the part to
full functionality
Reading the Signature Bytes
The 8XC5X has 3 signature bytes in locations 30H
31H and 60H To read these bytes follow the proce-
dure for EPROM verify but activate the control lines
provided in Table 4 for Read Signature Byte
Location
Device
Contents
30H
All
89H
31H
All
58H
60H
80C52
12H
87C52
52H
80C54
14H
87C54
54H
80C58
18H
87C58
58H
Erasure Characteristics
(Windowed Packages Only)
Erasure of the EPROM begins to occur when the
chip is exposed to light with wavelength shorter than
approximately 4000 Angstroms 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 la-
bel be placed over the window
The recommended erasure procedure is exposure
to ultraviolet light (at 2537 Angstroms) to an integrat-
ed dose of at least 15 W-seccm2 Exposing the
EPROM to an ultraviolet lamp of 12000 mWcm2
rating for 30 minutes at a distance of about 1 inch
should be sufficient
Erasure leaves all the EPROM Cells in a 1’s state
21


类似零件编号 - N80C58-2

制造商部件名数据表功能描述
logo
Intel Corporation
N80C51BH INTEL-N80C51BH Datasheet
229Kb / 16P
   CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
logo
Rochester Electronics
N80C51FA ROCHESTER-N80C51FA Datasheet
1,007Kb / 1P
   POWERFUL MICROCONTROLLER from the MCS 51 controller family 40 pin DIP
N80C51FA1 ROCHESTER-N80C51FA1 Datasheet
1,007Kb / 1P
   POWERFUL MICROCONTROLLER from the MCS 51 controller family 40 pin DIP
logo
Intel Corporation
N80C51GB INTEL-N80C51GB Datasheet
311Kb / 22P
   CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
logo
Advanced Micro Devices
N80C521 AMD-N80C521 Datasheet
1Mb / 25P
   CMOS SINGLE CHIP MICROCONTROLLER
More results

类似说明 - N80C58-2

制造商部件名数据表功能描述
logo
Intel Corporation
8XC51GB INTEL-8XC51GB Datasheet
311Kb / 22P
   CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
80C31BH INTEL-80C31BH Datasheet
229Kb / 16P
   CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
8XC52 INTEL-8XC52 Datasheet
317Kb / 23P
   CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
80C52 INTEL-80C52 Datasheet
312Kb / 23P
   CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
87C51FA INTEL-87C51FA Datasheet
279Kb / 18P
   CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
8XC51R INTEL-8XC51R Datasheet
294Kb / 20P
   CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
EN80C321SF88 INTEL-EN80C321SF88 Datasheet
1Mb / 23P
   CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
M80C51FB INTEL-M80C51FB Datasheet
184Kb / 12P
   CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
EE87C51FB1SF76 INTEL-EE87C51FB1SF76 Datasheet
256Kb / 18P
   CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
87C51FA INTEL-87C51FA Datasheet
279Kb / 18P
   CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com