Data transfer via communication ports
737
Part III FP Instructions
NOTE
For details on the operation of the "reception done" flag, the "transmission done" flag, and the
communication error flag, see page 757.
For details on the format of the da
ta in the send buffer and in the receive buffer, please see "Format of
send and r
eceive
data" on page 745.
Data cannot be sen
t unless the pin CS (Clear to Send) is on. When connecting to a three-wire port,
short-circuit the RS and CS pins.
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