I'm trying to use an Infineon/Siemens SLE4442 memory card in an embedded project.
As I can read only '1's can someone tell me what I must expect reading after a reset, as ATR bytes? I'm following the reset and read procedure as in datasheet, driving the card sync mode, and read every bit 1 in the first bytes...
What about reset/read timings? What if I move signals slowly as on the
datasheet? Can I do a sort of step by step communication? Any info or source example for any mcu? :?:
and then I read these bytes: but I read every bit '1' one. so I think probably something do not work well... How much strict are the timings listed in the datasheet? If I do things slower, can be this a problem? 8O
WriteByte(0x30); | Read Main MemoryCommand
WriteByte(0x00); | Adress
WriteByte(0x00); | No effect
-- Read Byte --- | Return Byte from Addres 0x00
More information in Siemens Data Sheet for SLE4432