9.3 Device Configuration Information

The Device Configuration Information (DCI) is a dedicated region in the program memory mapped from 3C0000h to 3C0009h. The data stored in these location is read-only and cannot be erased. Refer to the table below for the complete DCI table address and description. The DCI holds information about the device, which is useful for programming and Bootloader applications.

The erase size is the minimum erasable unit in the PFM, expressed as rows. The total device Flash memory capacity is (Erase size * Number of user-erasable pages).

Table 9-3. Device Configuration Information for PIC18FxxQ24 Devices
Address Name Description Value Units
PIC18F24Q24 PIC18F25/45/55Q24 PIC18F26/46/56Q24
3C 0000h ERSIZ Erase Page Size 128 Words
3C 0002h WLSIZ Number of write latches per row 0 Words
3C 0004h URSIZ Number of user erasable pages 64 128 256 Pages
3C 0006h EESIZ Data EEPROM memory size 512 Bytes
3C 0008h PCNT Pin Count 28 28/40(1)/48 28/40(1)/48 Pins
Notes:
  1. Pin Count value of 40 is used for 44-pin parts as well.