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 PIC18-Q84 Devices
Address	Name	Description	Value		Units
Address	Name	Description	PIC18F26/46/56Q84	PIC18F27/47/57Q84	Units
3C0000h-3C0001h	ERSIZ	Erase page size	128	128	Words
3C0002h-3C0003h	WLSIZ	Number of write latches per row	0	0	Words
3C0004h-3C0005h	URSIZ	Number of user-erasable pages	256	512	Pages
3C0006h-3C0007h	EESIZ	Data EEPROM memory size	1024	1024	Bytes
3C0008h-3C0009h	PCNT	Pin count	28/40⁽¹⁾/48	28/40⁽¹⁾/48	Pins
Note: Pin count of 40 is also used for 44-pin part.