KIT_TC1797_SK Infineon Technologies, KIT_TC1797_SK Datasheet - Page 24

• Manufacturer Part Number: KIT_TC1797_SK
• Description: KIT STARTER AUDO FUTURE TC1797
• Manufacturer: Infineon Technologies
• Series: Audo Futurer
• Type: MCUr

Specifications of KIT_TC1797_SK

• Contents: Board, Adapters, Cables, CD, Power Supply
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: TC1797
• Other names: KITTC1797SKIN

Since the initial contents of the upper context registers are unknown, it is
necessary to check one of the upper context registers twice, with different
values, in case the initial contents match the first value to be checked.
Note: The NOP instructions in the above code are mandatory to ensure that
Secondly, within the FCU trap handler itself, only the global and lower context
registers may be used, D0-D7 and A0-A9. Since the upper context information
is already lost in an FCU trap condition, usage of the global and lower context
registers without previously saving this information is acceptable.
CPU_TC.111 Imprecise Return Address for FCU Trap
The FCU trap is taken when a context save operation is attempted but the free
context list is found to be empty, or when an error is encountered during a
context save or restore operation. In failing to complete the context operation,
architectural state is lost, so the occurrence of an FCU trap is a non-recoverable
system error.
Since FCU traps are non-recoverable system errors, having a precise return
address is not important, but can be useful in establishing the cause of the FCU
trap. The TriCore1 CPU does not generate a precise return address for an FCU
trap if the cause of the FCU trap was one of the following trap types: FCD, DAE,
DIE, CAE or NMI.
In each of these circumstances the return address may be invalid.
Workaround
None
TC1797, EES-AC, ES-AC, AC
nop
jne
; Now read valid D15 to obtain TIN
...
reads from the GPRs target the register file directly, rather than the
forwarding paths which always function correctly.
d12, #-8, _fcu_handler
24/101
Functional Deviations
Rel. 1.3, 18.12.2009
Errata Sheet