ST STM32L4+ Series Reference Manual page 970

DSI Host (DSIHOST) applied to STM32L4R9xx and STM32L4S9xx only
DSI host interrupt
Bit
& Status register
0 11
0 10
0 9
0 8
0 7
0 6
970/2301
Table 209. Error causes and recovery (continued)
Name Cause of the error
The Acknowledge with Error
packet contains this error.
AE11 The Device does not recognize
the data type of at least one of
the received packets.
The Acknowledge with Error
packet contains this error.
AE10 The Device detects the CRC
errors in at least one of the
received packets.
The Acknowledge with Error
packet contains this error.
AE9 The Device detects multi-bit
ECC errors in at least one of
the received packets.
The Acknowledge with Error
packet contains this error.
The Device detects and
AE8
corrects the 1 bit ECC error in
at least one of the received
packets.
The Acknowledge with Error
packet contains this error.
AE7 The Device detects the Line
Contention through LP0/LP1
detection.
The Acknowledge with Error
packet contains this error.
AE6
The Device detects the False
Control Error.
RM0432 Rev 6
Recommended method
of handling the error
Check the Device capabilities. It is possible
that there are some packets not supported
by the Device.
Repeat the transmission.
Some of the long packets, transmitted after
the last Acknowledge request, might
contain the CRC errors in the payload.
If the payload content is critical, transmit
the packets again.
If this error is recurrent, carefully analyze
the connectivity between the Host and the
Device.
The Device does not interpret the packets
transmitted after the last Acknowledge
request.
If the packets are critical, transmit the
packets again.
If this error is recurrent, carefully analyze
the connectivity between the Host and the
Device.
No action is required.
The Device acknowledges the packet.
If this error is recurrent, analyze the signal
integrity or the noise conditions of the link.
This error might corrupt the Low-Power
data reception and transmission.
Ignore the packets and transmit them
again. The Device recovers automatically.
If this error is recurrent, check the Device
capabilities and the connectivity between
the Host and Device.
Refer to.section 7.2.1 of the DSI
Specification 1.1.
The device detects one of the following:
– The LP-10 (LP request) is not followed
by the remainder of a valid escape or
turnaround sequence.
– The LP-01 (HS request) is not followed
by a bridge state (LP-00).
The D-PHY communications are corrupted.
This error is unrecoverable.
Reset the DSI Host and the D-PHY.
Refer to the section 7.1.6 of the DSI
Specification 1.1.
RM0432