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SLE4432 Datasheet

  • SLE4432

  • Intelligent 256Bit EEPROM

  • Infineon   Infineon

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SLE 4432
SLE 4442
2.5
Reset Modes
Reset and Answer-to-Reset (compare 2.2.1)
Power on Reset
After connecting the operating voltage to VCC, I/O is high impedance Z. By all means, a read
access to any address or an Answer-to-Reset must be carried out before data can be altered.
2.6
Break
If RST is set to high during CLK in state L any operation is aborted and I/O is switched to high
impedance Z. Minimum duration of
t
RES
= 5
碌s
is necessary to trigger a defined valid reset. After
Break the chip is ready for further operations.
2.7
Failures
Behavior in case of failures:
In case of one of the following failures, the chip sets the I/O to high impedance Z after 8 clock pulses
at the latest.
Possible failures:
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
2.8
Comparison unsuccessful
Wrong command
Wrong number of command clock pulses
Write/erase access to already protected bytes
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. The relevant data are programmed in the memory area from address 0 to 31.
Afterwards the associated protection bits are programmed. As an example,
figures 12
and
13
show
ATR and Directory Data of Structure 1. When delivered, ATR header, ICM and ICT are
programmed. Siemens programs also the AID. The AID (Application IDentifier) consists of 5 byte
RID (Registered application provider IDentifier) administered by a national registration authority and
of up to 11 byte PIX (Proprietary application Identifier eXtension). There are two possibilities: the
customers AID or Siemens AID (only for sample quantities). Depending on the agreement between
the customer and Siemens ICCF can be also programmed before delivery.
Semiconductor Group
23

SLE4432 PDF文件相關型號

SLE4442,SLE4442C,SLE4442M2.2

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