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參數(shù)資料
| 型號： | SLE4428M2.2 |
| 廠商： | SIEMENS A G |
| 元件分類： | DRAM |
| 英文描述： | ICs for Chip Cards |
| 中文描述： | 1K X 8 3-WIRE SERIAL EEPROM, UUC8 |
| 封裝： | 2.20 MM, WIRE BONDED MODULE-8 |
| 文件頁數(shù)： | 13/17頁 |
| 文件大?。?/td> | 382K |
| 代理商： | SLE4428M2.2 |
Semiconductor Group
10
4
Security Features SLE 4428
Extra Operation for User Identification (Fig. 9)
Without a PSC entry only reading is possible. The contents of the PSC addresses cannot be read
out. If reading is attempted, "00" will appear. The verification procedure of the chip must be
performed in the following sequence
(Table 1)
:
– write one not written error-counter bit, address "1021",
– enter first PSC-code byte, address "1022",
– enter second PSC-code byte, address "1023",
– after correct input the error counter can be erased.
After the PSC verification,
I
/O goes from "1" to "0". It is switched back to “1” by RST transition “0”
to “1”. The error counter is not automatically erased.
Writing Error Counter
Before PSC entry only writing of the error counter is possible. The number of erased bits of the error
counter determines the number of possible attempts (max. 8). After successful access the error
counter should be erased before disconnecting the supply voltage in order to reactivate the
8 attempts. Each error when entering the PSC requires the writing of a new counter bit.
Entry of PSC
The least-significant PSC byte beginning with the least significant bit must be entered first and then
the most-significant one. If the internal data comparison proves correct, the EEPROM is enabled for
erasing and writing as long as the operating voltage is applied. After enabling, the PSC may be
altered as wished, except the corresponding protect bits are "0".
Condition when supplied
SLE 4428 is only supplied by the producer with a 2-byte PSC (transport code) which is agreed with
the customer.
Table 1
Control Words for Command Entry, User Identification
Byte 1
Byte 2
Byte 3
Operation
S0 S1 S2 S3 S4 S5 A8A9
A0-A7
D0-D7
0
1
0
0
1
1
1
1
253
Bit mask
Write error counter
1
0
1
1
0
0
1
1
254
PSC byte 1
Verify 1st PSC byte
1
0
1
1
0
0
1
1
255
PSC byte 2
Verify 2nd PSC byte
SLE 4418
SLE 4428
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SLE4418 | ICs for Chip Cards |
| SLE 4418 | Intelligent 8-Kbit(1024 x 8-bit) EEPROM With Write Protection Function(智能化8K位(1024 x 8位) EEPROM) |
| SLE4418C | 16MM ILLUM 65168-013 |
| SLE4428 | 16MM PUSH BUTTON OPERATOR |
| SLE4428C | 16MM PB 65168-010 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SLE4432 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Chip Cards / Intelligent 256/64/128-Byte EEPROM |
| SLE4432C | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Chip Cards / Intelligent 256/64/128-Byte EEPROM |
| SLE4432M2.2 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Chip Cards Intelligent 256-Byte EEPROM |
| SLE4432M3 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Chip Cards / Intelligent 256/64/128-Byte EEPROM |
| SLE4436 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Security & Chip Card ICs |
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