Bit Rising Error (Bre); Short Bit Period Error (Sbpe); Long Bit Period Error (Lbpe) - ST STM32F446 Series Reference Manual

RM0390
32.5.3

Bit Rising Error (BRE)

BRE (bit rising error): is set when a bit rising edge is detected outside the windows where it
is expected (see
In the case of a BRE detection, the message reception can be stopped according to the
BRESTP bit value and an error bit can be generated if BREGEN bit is set.
When BRE is detected in a broadcast message with BRESTP=1 an error bit is generated
even if BREGEN=0 to enforce initiator's retry of the failed transmission. Error bit generation
can be disabled by configuring BREGEN=0, BRDNOGEN=1.
32.5.4

Short Bit Period Error (SBPE)

SBPE is set when a bit falling edge is detected earlier than expected (see
SBPE flag also generates a CEC interrupt if the SBPEIE=1.
An error bit is always generated on the line in case of a SBPE error detection. An Error Bit is
not generated upon SBPE detection only when Listen mode is set (LSTN=1) and the
following conditions are met:
•
A directly addressed message is received containing SBPE
• A broadcast message is received containing SBPE AND BRDNOGEN=1
32.5.5

Long Bit Period Error (LBPE)

LBPE is set when a bit falling edge is not detected in a valid window (see
flag also generates a CEC interrupt if the LBPEIE=1.
LBPE always stops the reception, an error bit is generated on the line when LBPEGEN bit is
set.
When LBPE is detected in a broadcast message an error bit is generated even if
LBPEGEN=0 to enforce initiator's retry of the failed transmission. Error bit generation can
be disabled by configuring LBPEGEN=0, BRDNOGEN=1.
Note: The BREGEN=1, BRESTP=0 configuration must be avoided
Figure 440). BRE flag also generates a CEC interrupt if the BREIE=1.
RM0390 Rev 4
HDMI-CEC controller (HDMI-CEC)
Figure
Figure
440).
440). LBPE
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