SAF-XC164GM-8F20F INFINEON [Infineon Technologies AG], SAF-XC164GM-8F20F Datasheet - Page 25

• Manufacturer Part Number: SAF-XC164GM-8F20F
• Description: 16-Bit Single-Chip Microcontroller with C166SV2 Core
• Manufacturer: INFINEON [Infineon Technologies AG]

The XC164GM also provides an excellent mechanism to identify and to process
exceptions or error conditions that arise during run-time, so-called ‘Hardware Traps’.
Hardware traps cause immediate non-maskable system reaction which is similar to a
standard interrupt service (branching to a dedicated vector table location). The
occurrence of a hardware trap is additionally signified by an individual bit in the trap flag
register (TFR). Except when another higher prioritized trap service is in progress, a
hardware trap will interrupt any actual program execution. In turn, hardware trap services
can normally not be interrupted by standard or PEC interrupts.
Table 3-3
run-time:
Table 3-3
Exception Condition
Reset Functions:
•
•
•
Class A Hardware Traps:
•
•
•
•
Class B Hardware Traps:
•
•
•
•
Reserved
Software Traps
•
1) Register VECSEG defines the segment where the vector table is located to.
Data Sheet
Bitfield VECSC in register CPUCON1 defines the distance between two adjacent vectors. This table
represents the default setting, with a distance of 4 (two words) between two vectors.
Hardware Reset
Software Reset
W-dog Timer Overflow
Non-Maskable Interrupt
Stack Overflow
Stack Underflow
Software Break
Undefined Opcode
PMI Access Error
Protected Instruction
Fault
Illegal Word Operand
Access
TRAP Instruction
shows all of the possible exceptions or error conditions that can arise during
Hardware Trap Summary
Trap
Flag
–
NMI
STKOF
STKUF
SOFTBRK
UNDOPC
PACER
PRTFLT
ILLOPA
–
–
Trap
Vector
RESET
RESET
RESET
NMITRAP
STOTRAP
STUTRAP
SBRKTRAP
BTRAP
BTRAP
BTRAP
BTRAP
–
–
23
Vector
Location
xx’0000
xx’0000
xx’0000
xx’0008
xx’0010
xx’0018
xx’0020
xx’0028
xx’0028
xx’0028
xx’0028
[2C
Any
[xx’0000
xx’01FC
in steps of
4
H
H
- 3C
Functional Description
H
H
H
H
H
H
H
H
H
H
H
H
H
1)
]
H
-
] [0B
Trap
Number
00
00
00
02
04
06
08
0A
0A
0A
0A
0F
Any
[00
7F
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
]
]
-
-
Derivatives
V1.0, 2005-11
XC164GM
Trap
Priority
III
III
III
II
II
II
II
I
I
I
I
–
Current
CPU
Priority