The figure below shows the tinyAVR 1-series devices, illustrating pin count variants and memory sizes.
- Vertical migration upwards is possible without code modification, as these devices are pin compatible and provide the same or more features. Downward migration may require code modification due to fewer available instances of some peripherals.
- Horizontal migration to the left reduces the pin count and therefore the available features.
Figure 1. tinyAVR® 1-Series Device Overview
Devices with different Flash memory size typically also have different SRAM and EEPROM.