MC68HC11P2 Datasheet, PDF (99/268 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Serial Communications Interface (SCI)
SCI registers
OR — Overrun error flag
1 = Overrun detected.
0 = No overrun.
OR is set if a new character is received before a previously received
character is read from SCDR. Clear the OR flag by reading SCSR1
with OR set and then reading SCDR.
NF — Noise error flag
1 = Noise detected.
0 = Unanimous decision.
NF is set if the majority sample logic detects anything other than a
unanimous decision. Clear NF by reading SCSR1 with NF set and
then reading SCDR.
FE — Framing error
1 = Zero detected.
0 = Stop bit detected.
FE is set when a zero is detected where a stop bit was expected.
Clear the FE flag by reading SCSR1 with FE set and then reading
SCDR.
PF — Parity error flag
1 = Incorrect parity detected.
0 = Parity correct.
PF is set if received data has incorrect parity. Clear PF by reading
SCSR1 with PE set and then reading SCDR.
MC68HC11P2 — Rev 1.0
Serial Communications Interface (SCI)
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Technical Data