DataSheet8.cn


PDF ( 数据手册 , 数据表 ) NM95HS01

零件编号 NM95HS01
描述 (NM95HS01 / NM95HS02) HiSeC-TM High Security Rolling Code Generator
制造商 National Semiconductor
LOGO National Semiconductor LOGO 


1 Page

No Preview Available !

NM95HS01 数据手册, 描述, 功能
www.DataSheet4U.com
February 1996
NM95HS01 NM95HS02
HiSeCTM High Security Rolling Code Generator
General Description
Features
The NM95HS01 02 HiSeC Rolling Code Generator is a
small footprint monolithic CMOS device designed to pro-
vide a complete low-cost high security solution to the prob-
lem of generating encrypted signals for remote keyless en-
try (RKE) applications
The NM95HS01 02 generates a fully encoded bit stream
each time one of (up to) 4 switch inputs is activated The
patented coding scheme utilizes 248 possible user-pro-
grammable coding combinations and features high linear
complexity and correlation immunity High security is guar-
anteed by generating a unique (rolling) code for each trans-
mission and can be further enhanced by creating custom-
ized algorithms for individual customers With this product
each key can be designed to be both unique and highly
secure
Y High security coding scheme with 248 combinations
Y High linear complexity and correlation immunity
Y 2 2V to 6 5V operation
Y Less than 1 mA standby current
Y Full resynchronization capability
Y Unique customized algorithm option
Y 13 bytes on-chip non-volatile configuration memory
Y RC or XTAL clock options for to 4 1 MHz operation
Y Supports both IR and RF signal transmission
Y Selection of bit coding and transmission frame formats
Y Space saving narrow body SO8 or SO14 packages
Y Up to 4 key switch inputs on SO14 package
Applications
The NM95HS01 02 supports either an IR or RF signal
transmitter and can be clocked with either an RC clock
(NM95HS01) or a crystal oscillator (NM95HS02) The de-
vice operates over a voltage range of 2 2V to 6 5V and
offers a low power standby mode (k1 mA) for battery appli-
cations The product is available in both 8-pin and 14-pin SO
packages with 2 or 4 key switch inputs that can be used for
customer presets such as seat positions and vehicle oper-
ating functions such as car door locking unlocking
Y Remote Keyless Entry (RKE) applications
Y Burglar alarms garage door openers
Y Individualized recognition transmission systems
Y Personalized consumer automotive applications
Relevant Documents
Y MM57HS01 datasheet
Y Designing and Programming a Complete HiSeCTM-
based RKE System
AN-985
Patents Pending
Y HiSeC Remote Keyless Entry Solution Encoder Decod-
DataSheereCth4ipUS.ectoUmser’s Manual
AN-355
Functional Block Diagram
DataShee
Note Signals shown are internal logic signals
FIGURE 1
HiSeCTM and MICROWIRETM are trademarks of National Semiconductor Corporation
C1996 National Semiconductor Corporation TL D 12302
RRD-B30M66 Printed in U S A
TL D 12302 – 1
DataSheet4U.com
DataSheet4 U .com







NM95HS01 pdf, 数据表
www.DataSheet4U.com
Data Frame Fields (Continued)
The preamble has a fixed format of two bit times at system
logic high then one-bit time at system logic low then eight
zeroes using the user-selected bit coding format This ar-
rangement is clearly shown in Figure 6 for several bit coding
formats
If desired a preamble may be isolated from the frame by
eight-bit times at logic low during a frame transmission This
can be achieved by enabling the sync field in NRZ mode
with the byte 0h
SYNC FIELD
If enabled the sync field is transmitted in every normal data
frame or sync frame to provide a bit timing reference for the
rest of the frame This allows the decoder to determine the
proper bit coding format the generator is using and to syn-
chronize to it
The sync field option is set with the SyncPresent bit in the
EEPROM array If SyncPresent e 0 no sync field is sent If
SyncPresent e 1 an 8-bit sync field is included in the data
transmission This 8-bit field is transmitted Most Significant
Bit first
The sync field data is programmable and can be encoded
with any user-selected bit coding format or with an NRZ
(unencoded binary) bit format The option to select between
a user bit coding format and NRZ format is set by configur-
ing the SyncType bit in the EEPROM array If SyncType e
0 sync field data is sent according to the user-selected IR
or RF bit coding format If SyncType e 1 the information is
sent in NRZ format with the bit length determined by the
chosen IR or RF bit coding format
For NRZ bit coding both high and low bit times are the
same as the IR or RF bit coding time For bit coding modes
where the ‘‘1’’s and ‘‘0’’s have different bit lengths all IR
modes for example the length of the NRZ ‘‘1’’ and ‘‘0’’
bits have correspondingly different bit lengths
RF bit coding format 7 is a special case As in the other
formats if SyncType e 0 information is sent according to
the user-set IR or RF bit coding format However if Sync-
Type e 1 a ‘‘0’’ is sent using the bit coding determined by
the IR or RF coding format and a ‘‘1’’ is sent as an NRZ
zero This is to maintain the ‘‘spirit’’ of the low duty cycle
arrangement for RF format 7
Figure 7 shows sync field examples for several bit coding
formats
et4U.com
DataSheet4U.com
FIGURE 6 Preamble Format Examples
TL D 12302 – 17
DataShee
http www national com
FIGURE 7 Sync Field ExampIes for Data Byte 03h
8
DataSheet4U.com
DataSheet4 U .com
TL D 12302 – 18







NM95HS01 equivalent, schematic
www.DataSheet4U.com
Timing Diagrams
Write Mode
et4U.com
Read Mode
TL D 12302 – 21
DataSheet4U.com
TL D 12302 – 22
DataShee
http www national com
DataSheet4U.com
DataSheet4 U .com
16










页数 20 页
下载[ NM95HS01.PDF 数据手册 ]


分享链接

Link :

推荐数据表

零件编号描述制造商
NM95HS01(NM95HS01 / NM95HS02) HiSeC-TM High Security Rolling Code GeneratorNational Semiconductor
National Semiconductor
NM95HS02(NM95HS01 / NM95HS02) HiSeC-TM High Security Rolling Code GeneratorNational Semiconductor
National Semiconductor

零件编号描述制造商
STK15C88256-Kbit (32 K x 8) PowerStore nvSRAMCypress Semiconductor
Cypress Semiconductor
NJM4556DUAL HIGH CURRENT OPERATIONAL AMPLIFIERNew Japan Radio
New Japan Radio
EL1118-G5 PIN LONG CREEPAGE SOP PHOTOTRANSISTOR PHOTOCOUPLEREverlight
Everlight


DataSheet8.cn    |   2020   |  联系我们   |   搜索  |  Simemap