The 1st 64k block's address is reserved for program space and is hard-wired at the E0 EEProm socket.

The 5th 64k block is address is hard-wired at the E1 EEPRom socket. This socket can be used for either the EEProm memories, or a pin compatible coprocessor.

Microchip produces 4K, 8K, 16K and 32K EEProms that will work in either the E0 or E1 EEPRom sockets.

• 24LC32 - 4K Bytes (32k bits)
• 24LC64 - 8K Bytes (64k bits)
• 24LC128 - 16K Bytes (128k bits)
• 24LC256 - 32K Bytes (256k Bits)

The OOPic is shipped with a 4k EEProm in the E0 socket, but can be replaced with any of the I2C compatible EEProm chips available.

See 8-Pin Socket Detail For more information on the E0 and E1 sockets.