I`m working now with a cypress microcontroler, it`s a 8052 similar plus others digital and analog configurables block.
In my recent project. Ï'm using a smart card with chip sle4442 Siemens compatible.
This card has 224 bytes of eeprom plus 32 bytes of security memory.
The protocol comunication are 2 wire bus, and after reset the card sends a answer to reset ATR.
The ATR response are formated in 4 bytes that look like this A2 13 10 88 after ATR response, I can't execute any operation of read or write to main memori ( 224 bytes ).
This card was a 3 bytes of security code that allows the user to write in memory ( security ou main ).
I'm looking for some sugestion or examples that cold me allow, to get full acess on this card.
If somebody want's a Data Sheet I'll happyful in send it.
PS: I'm looking for ISO/IEC JTC1/SC17 this article describe the signify of ATR values.
Any information will be helpful.
Thanks in Advance.
Leo from Brazil