Receiving Status - Fujitsu F2MC-8L F202RA Hardware Manual

CHAPTER 13 UART
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Receiving Status

Figure 13.4-5 shows the states (receiving status) of serial input data obtained from the received data flag bit
(RDRF) and error flag bit (ORFE).
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Figure 13.4-5 Receiving Status
RDRF
ORFE
Received data flag bit/Overrun/Framing error flag bit
0 0
0 1
1 0
Overrun error (previous data remaining)
1 1
: Initial value
No data
Framing error
Normal data