Can I use the Uno as a ISP to put the bootloader on the 162?
Let's find out. First stop, the datasheet... http://www.atmel.com/Images/doc2513.pdf
We need to look through the Memory Programming
section. We're looking for Serial Downloading
. And, it's there.
Wiring is easy to remember...
MISO to MISO
MOSI to MOSI
SCK to SCK
GND to GND
SS on the Uno to RESET on the target
The target has to be powered close to 5V. As long as the current is within reasonable limits, the target can be powered from the Uno.
The target's SPI pins are listed in the Memory Programming
/ Serial Downloading