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diff --git a/sle44xx/README b/sle44xx/README new file mode 100644 index 0000000..cd60134 --- /dev/null +++ b/sle44xx/README @@ -0,0 +1,29 @@ +------------------------------------------------------------------------ +Siemens SLE44xx Chip Card Protocol +------------------------------------------------------------------------ + +SLE 4418/4428/4432/4442 memory cards implement a 2-wire protocol for data +communication (signals CLK and I/O). A RST signal can be used to terminate +currently pending long memory reads, and resets the card's address counter +when combined with CLK. The next response data then is the Answer to Reset +(ATR) which identifies the chip's capabilities, and allows to adjust for +subsequent communication of more requests. + +See the Siemens document for details: + + ICs for Chip Cards + Intelligent 256-Byte EEPROM + SLE 4432/SLE 4442 + Data Sheet 07.95 + + +Logic analyzer setup +-------------------- + + Probe SLE44xx + ---------------- + 0 I/O + 1 CLK + 2 RST + +See subdirectories for chip specific example files. |