2.3.1 Interrupt Level 1 Does Not Work

Interrupt Level 1 may fail to execute correctly by executing the Reset vector rather than the intended interrupt vector. This only applies to the following products and is limited to date codes older than 1914 (week 14 of 2019).

  • ATMEGA4809-AF
  • ATMEGA4809-AFR
  • ATMEGA4809-AU
  • ATMEGA4809-AUR
  • ATMEGA4809-MF
  • ATMEGA4809-MFR
  • ATMEGA4809-MU
  • ATMEGA4809-MUR
  • ATMEGA4809-PF

Work Around

Use Interrupt Level 0 instead of Interrupt Level 1.

Affected Silicon Revisions

Rev. B
X