PXN20RM Datasheet, PDF (637/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

FlexRay Communication Controller (FlexRAY)
26.5.2.11 Protocol Interrupt Flag Register 0 (PIFR0)
Base + 0x0018
Write: Normal Mode
0
1
2
3
4
5
6
7
8
9
10
11
12
13
R FATL INTL ILCF CSA MRC MOC CCL MXS MTX LTXB LTXA TBVB TBVA TI2
_IF _IF _IF _IF _IF _IF _IF _IF _IF _IF _IF _IF _IF _IF
14
15
TI1 CYS
_IF _IF
W w1c w1c w1c w1c w1c w1c w1c w1c w1c w1c w1c w1c w1c w1c w1c w1c
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 26-11. Protocol Interrupt Flag Register 0 (PIFR0)
The register holds one set of the protocol-related individual interrupt flags.
Table 26-17. PIFR0 Field Descriptions
Field
FATL_IF
INTL_IF
ILCF_IF
CSA_IF
MRC_IF
MOC_IF
Description
Fatal Protocol Error Interrupt Flag — This flag is set when the protocol engine has detected a fatal protocol
error. In this case, the protocol engine goes into the POC:halt state immediately. The fatal protocol errors are:
1) pLatestTx violation, as described in the MAC process of the FlexRay protocol
2) transmission across slot boundary violation, as described in the FSP process of the FlexRay protocol
0 No such event.
1 Fatal protocol error detected.
Internal Protocol Error Interrupt Flag — This flag is set when the protocol engine has detected an internal
protocol error. In this case, the protocol engine goes into the POC:halt state immediately. An internal protocol
error occurs when the protocol engine has not finished a calculation and a new calculation is requested. This
can be caused by a hardware error.
0 No such event.
1 Internal protocol error detected.
Illegal Protocol Configuration Interrupt Flag — This flag is set when the protocol engine has detected an
illegal protocol configuration parameter setting. In this case, the protocol engine goes into the POC:halt state
immediately.
The protocol engine checks the listen_timeout value programmed into the Protocol Configuration Register 14
(PCR14) and Protocol Configuration Register 15 (PCR15) when the CONFIG_COMPLETE command was sent
by the application via the Protocol Operation Control Register (POCR). If the value of listen_timeout is equal to
zero, the protocol configuration setting is considered as illegal.
0 No such event.
1 Illegal protocol configuration detected.
Cold Start Abort Interrupt Flag — This flag is set when the configured number of allowed cold start attempts
is reached and none of these attempts was successful. The number of allowed cold start attempts is configured
by the coldstart_attempts field in the Protocol Configuration Register 3 (PCR3).
0 No such event.
1 Cold start aborted and no more coldstart attempts allowed.
Missing Rate Correction Interrupt Flag — This flag is set when an insufficient number of measurements is
available for rate correction at the end of the communication cycle.
0 No such event.
1 Insufficient number of measurements for rate correction detected.
Missing Offset Correction Interrupt Flag — This flag is set when an insufficient number of measurements is
available for offset correction. This is related to the MISSING_TERM event in the CSP process for offset
correction in the FlexRay protocol.
0 No such event.
1 Insufficient number of measurements for offset correction detected.
Freescale Semiconductor
PXN20 Microcontroller Reference Manual, Rev. 1
26-23