Keyboard clock rate?

Question

Keyboard

The question is: with what maximum frequency can messages be sent to the keyboard?
In particular, I'm interested in: with what frequency can you blink diodes (caps lock for example)?
The question is not related to the upgrade of hardware - only the possibility of software implementation is of interest.
The answer to the question is necessary for the idiotic idea of ​​\u200b\u200b"abnormal programming" - to write a diode brightness control on the keyboard (something like a PWM).

Answer 1

The clock frequency of the PS / 2 itself is about 20-30KHz. Roughly speaking, 30Kbps is ideal, but you need to transfer bytes and you need time to switch. Having estimated very roughly, we get at least a kilohertz per PWM.
I think you can try :)