PXS20RM Datasheet, PDF (519/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Fault Collection and Control Unit (FCCU)
Offset: 0x080–0x08C (4 registers)
Access: User read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
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
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
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 22-13. FCCU NCF Status Register (FCCU_NCFS0..3)
Table 22-12. FCCU_NCFS0..3 field descriptions
Field
NCFSx
Non-critical fault status
0: No “non-critical” fault latched
1: “non-critical fault” latched
Description
The status bits related to the non-critical fault configured as HW recoverable faults are read-only
and the flag is self cleared when the fault source is removed.
The status bits related to the critical fault configured as SW recoverable faults are write-clear and
the SW application can recover from a faulty condition.
22.6.11 FCCU NCF Key Register (FCCU_NCFK)
The FCCU_NCFK register implements the key access to clear the status flags of the FCCU_NCFSx
register.
The status bits of the FCCU_NCFSx register, configured as SW recoverable faults, can be cleared by the
following locked sequence:
• to write the key into the FCCU_NCFK register
• to clear the status (flag) bit NCFSx
NOTE
The key must be written for reach FCCU_NCFSx clear operation.
The FCCU_NCFK register is not readable, a 0x00000000 value is always returned in case of read
operation.
Freescale Semiconductor
PXS20 Microcontroller Reference Manual, Rev. 1
22-19