5.2.18 - AsynchRX [U3 Datasheet]

Requires U3 hardware version 1.21. Reads the oldest 32 bytes from the U3 UART RX buffer (received on receive terminal). The buffer holds 256 bytes.

Table 5.2.18-1. AsynchRX Command Response

• Flush: If nonzero, the entire 256-byte RX buffer is emptied. If there are more than 32 bytes in the buffer that data is lost.
• NumAsynchBytesInRXBuffer: Returns the number of bytes in the buffer before this read.
• AsynchByte#: Returns the 32 oldest bytes from the RX buffer.