Looking for info on the internal workings of the 41's IR printer module

[Monte Dalrymple]

(05-06-2016 04:51 PM)emece67 Wrote:  Hi all,

I'm aware of the IR protocol used by hp's IR printers, and also aware that the ROM for the IR printer module is available. But, has anybody a clue about the hardware inner workings of such module? How does the 41 control the IR LED? Does the nut processor directly access the LED or has the module some counters/timers to do so?

I've searched the forum (and also the documents in TOS) to no avail.

Thanks & regards.

I expect that the IR module contains either a microcontroller or an ASIC to implement the IR protocol and drive the LED. Given the frequencies involved the 41 CPU cannot be doing it directly. I have always been curious about this also, but I am too cheap to take apart my module to see what's inside.