| P1 (MODE) | P2 | Meaning | |
| Bit 7 | Bits 6 – 0 | ||
| 1 | HI value | LO value | +Allocate buffer with size HI-LO | +
| 0 | rfu | ID | +Free buffer with ID in P2 | +
| System_Challenge | +Command Header CLA INS P1 P2 |
+ Global Life Cycle Phase | +Internal Parameters | +Number of loaded Packages | +Chip Unique Identification Number (opt.) | +
|---|---|---|---|---|---|
| xxh…xxh | 80h 88h Mode 00h | xxh | +22h…22h | xxh | xxh…xxh | +
| n bytes | 4 bytes | 1 byte | 9 bytes | +1 byte | 6 bytes/empty | +