Replacing Atmega161 By Atmega162

 This application note is a guide to assist current ATMEGA161 users in converting exist-
ing designs to the ATmega162. The ATMEGA162 has two operating modes selected
through the fuse settings. The M161C Fuse selects whether the ATMEGA161 compati-
bility mode should be used or not. By default, the M161C Fuse is unprogrammed and
the ATMEGA162 operates in Normal mode. When the compatibility mode is used, only
non-conflicting enhancements make the part different from the ATmega161. Addition-
ally, the electrical characteristics of the ATMEGA162 are different including an increase
in operating frequency because of a change in process technology. Check the data
sheet for detailed information. When the M161C Fuse is unprogrammed, all new fea-
tures are supported, but porting the code may require more work.
ATMEGA161 Errata Corrected in ATMEGA162 BR>The following items from the Errata Sheets of the ATMEGA161 do not apply to the
ATmega162. Refer to the ATMEGA161 Errata Sheet for a more detailed description of
the Errata.
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