Datasheet

7. Comparison Between Processors

The ATmega48PB/88PB/168PB differ only in memory sizes, boot loader support, and interrupt vector

sizes. The table below summarizes the different memory and interrupt vector sizes for the devices.

Table 7-1. Memory Size Summary

Device Flash EEPROM RAM Interrupt Vector Size

ATmega48PB 4KBytes 256Bytes 512Bytes 1 instruction word/vector

ATmega88PB 8KBytes 512Bytes 1KBytes 1 instruction word/vector

ATmega168PB 16KBytes 512Bytes 1KBytes 2 instruction words/vector

ATmega88PB/168PB support a real Read-While-Write Self-Programming Mechanism (SPM). The SPM

instruction can only execute from the separate Boot Loader Section. In ATmega48PB there is no Read-

While-Write support and no separate Boot Loader Section. The SPM instruction can execute from the

entire Flash.

ATmega48PB/88PB/168PB

Datasheet Summary

DS40001910A-page 15