Memory device is NEC uPD70F3556.
You can read NEC data flash and program key by OBD2 with VagTacho K+CAN with Fiat activation or with UPA-S, download connection diagram.
Expected file size is 32768 or 65536 bytes.
Software shows 5-digit PIN code.
Use original Fiat remote key with Megamos Crypto 128-bit AES ID88 transponder. Remote part is also programmed and is operating.
Programmed key must be matched with the car using a diagnostic device.
Vehicles equipped with this unit:
Fiat:500X, Tipo, Egea