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Can asynchronous reception be performed using an external clock?

Latest Updated:01/23/2014

Question:

Can asynchronous reception be performed using an external clock?

Answer:

If set to "use external clock input", it will operate on the external clock, regardless of the bit rate set in the bit rate register (BRR).

In this case, input a clock with a frequency of 16 times the bit rate (if the SEMR.ABCS bit = 0) or 8 times the bit rate (if the SEMR.ABCS bit = 1) to the SCKn pin.
For frequencies that can be input to the SCK pin, please check Timing of On-Chip Peripheral Modules in th AC Characteristics section of the User's Manual: Hardware.

Suitable Products
RX630
RX63N, RX631
RX210