I am starting to work with the RIO peripheral and it says that the CLK output from the Rabbit 4000 uP is a good input for the RIO’s CLK input. However, I am using a rabbitCore 4010, and I dont see mention of any CLK output on the main pinout. Is there a way to make the RIO work off the rabbitCore’s clock? Thanks.
The answer from Rabbit:
The RIO will need a dedicated clock line which we don’t provide off the Rabbit.
You can fake a clock line using a serial port pin but your top speed for the RIO clock will be:
RIO CLK = (Rabbit CPU)/2n
Where n represents an integer greater than zero.
You can find a schematic for the suggested clock circuit on the RIO’s page under their schematic download.