Which is the buffer size and how is it controlled by the HW flow control?
UC864 controls its own maximum transmission rate by the dsm watermark
and flow control, hence the missing of transmission data doesn’t occur
during the UART communication unlike USB interface. Of course, its data
rate is lower than that of USB interface. The SIO buffer for UC864 is
the following: TX buffer : 35000bytes (Module->DTE)RX buffer : 6000 bytes (Module<-DTE)
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