Standalone Clock

[hahahi]

Hi,

I use an Arduino Uno to drive a TLC5940 with the hw clock output (16 MHz) enabled via the fuse register and want to switch to a Pro Micro which features HID. Problem is, the ATmega32u4 clock pin isn't exposed on this board.
What's a reliable way to provide extra clock input for the TLC5940 that doesn't cost more than getting another MCU?

 

[AnalogKid]

Links to the components you are considering would help.

ak

 

[hahahi]

Links... so discrete components won't probably do. I've seen mentioned a CMOS inverter with a 74C04, but you can get a '328 cheaper. Pierce oscillator would be simpler, but would it suffice for a TLC5940?
I have a dead mouse lying around. Assuming my soldering skills would be good enough to extract its nRF24LE1, it has a clock driver. What's the typical impedance/voltage on these MCU clock inputs with internal drivers? Could you tap it to drive the TLC5940?

 

[hevans1944]

Perhaps something from this vendor will suffice...

 

[ankit guhe]

All you need to do is burn the XYZ -Hz bootloader. This will set the correct fuses and code that is meant for that processor will run correctly. If you have an Uno, you will also need to modify the board.