Continuing the craziness of operating AVR ISP programming by hand. This video covers device signatures generally and shows reading them with switches and LEDs as well as other details of the ISP protocol such as /RESET signal behaviour.

Series playlist:
   • AVR ISP by hand  

00:00 Intro
00:27 Entering programming immediately on power-up.
01:59 Regarding leaving the RESET state.
03:47 Signatures
07:17 Why you read signatures.
08:13 The signature read instruction
10:39 Filling in the general instruction form for the first signature byte.
11:45 Per-bit transaction overview
12:09 First signature byte
13:44 Second signature byte.
15:12 Third signature byte.