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.

Atmel ATmega48PB/88PB/168PB [DATASHEET]

Atmel-42176G-ATmega48PB/88PB/168PB_Datasheet_Summary-03/2016

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