ATmega8515 Datasheet, Pinout, Minimal Circuit, Maximum Frequency Calculator
The ATmega8515 is a replacement for the AT90S4414/8515 MCU. It has an external memory bus that allows the addition of upto 64k SRAM or memory mapped I/O ports. It is not 100% compatible, but there is a compatibility fuse that makes it so. Use the ATmega8515 when you need access to external resources. The ATmega162 is a more capable version, with additional I/O, but the additional I/O can't be used if external memory is used.