BL7442LV Datasheet, PDF (8/10 Pages) SHANGHAI BELLING CO., LTD. – Low voltage Intelligent 2K bits EEPROM

BL7442LV Low voltage
Intelligent 2K bits EEPROM
--Rewriting and erasing of a bit in the protection memory
Coding of the Chip
Due to security purposes every chip is irreversibly coded by a scheme. By this way fraud and
misuse is excluded. As an example, figures 10 and 11 show ATR and Directory Data of structure
1.When delivered, ATR header, ICM and ICT are programmed. Depending on the agreement
between the customer and Shanghai Belling CO. LTD. ICCF, the chip type and other content can
be also programmed before delivery.
ATR header
ATR data
DIR data
Application
H1 H2 H3 H4 TM LM ICM ICT ICCF ICCSN TT LT TA LA AID TD LD
AP
LA
LD
LM
LT
FILE
AID:Application identifier
AP:Application personalizer identifier
ATR:Answer-to-Reset
DIR:Directory
H1,H2:ATR protocol bytes
H3,H4:ATR historical bttes
ICCF:IC card fabricator identifier
ICCSN:IC card serial number
ICM:IC manufacturer identifier
ICT:IC type
LA:Length of AID
LD:Length of application template
LM:Length of manufacturer data
LT:Length of application template
TA:Tag of AID
TD:Tag of discretionary data
TM:Tag of manufacturer data
TT:Tag of application data
Figure 10 Synchronous Transmission ATR and Directory Data of Structure1
Protocol bytes according to ISO 7816-3
Historical bytes acoording to ISO 7816-4
Protocol type H1
Protocol parameter H2 ^{Category indicator H3 DIR data reference H4}
b8 b7 b6 b5 b4 b3 b2 b1 b8 b7 b6 b5 b4 b3 b2 b1 b8 b7 b6 b5 b4 b3 b2 b1 b8 b7 b6 b5 b4 b3 b2 b1
10100010000100110001000010010001
Structure
Protocol type RFU _indentifier
Number Length of
of data data units x
units
in bits ^{(2 x )}
Category
indicator
according to ISO
7816-4
b8=1
b7-b1= reference of
DIR data
0-7 =defined by ISO
8-E = notdel. by ISO
8= serial data access
protocol
9=3 wire bus protocol
A=2 wire bus protocol
F=RFU
RFU
000= ^{no indication}
001=128
010=256
011=512
100=1024
101=2048
110=4096
111=RFU
b8=0
b7-b1= ^{Outside the scope}
of 7816-4
00= defined by ISO
10=structure 1
01=structure 2
11=structure 3
not defined
by ISO
0:
Read to end
1: _{Read with defined length}
1: ^{DIR data reference}
specified
0: DIR data reference
not specified
Figure 11 Answer-to-Reset for Synchronous Transmission Coding of Structure
http://www.belling.com.cn
-8-
Total 10 Pages
8/16/2006