Difference between DPU EPROM rev 2.21 and 2.22

Issue

What are the differences between DPU EPROM rev 2.21 and 2.22?

Product Line

TAC I/NET

Environment

DPU EPROM

Cause

On the 2.22 rev, one problem was corrected and an enhancement included.

Resolution

  1. The problem was when using first key auto-unlock, the software would show the door as unlocked, when the first valid read had not yet unlocked it. It now remains in the secure mode in software until the first valid read.
  2. The enhancement is that when a DPU is operating on back up battery power, the power led will now flicker to indicate the change from commercial power.