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ST10F268 Datasheet(PDF) 25 Page - STMicroelectronics

Part # ST10F268
Description  16-BIT MCU WITH 256K BYTE FLASH MEMORY AND 8K BYTE RAM
PDF  74 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10F268 Datasheet(HTML) 25 Page - STMicroelectronics

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Hardware traps are exceptions or error conditions
that arise during run-time. They cause immediate
non-maskable system reaction similar to a stan-
dard 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 other program
execution.
Hardware trap services cannot not be interrupted
by standard interrupt or by PEC interrupts.
Table 10 shows all of the possible exceptions or
error conditions that can arise during run-time :
Table 10 : Exceptions or error conditions that can arise during run-time
Exception Condition
Trap Flag Trap Vector
Vector Location
Trap Number
Trap Priority
Reset Functions
Hardware Reset
RESET
00’0000h
00h
III
Software Reset
RESET
00’0000h
00h
III
Watchdog Timer Overflow
RESET
00’0000h
00h
III
Class A Hardware Traps
Non-Maskable Interrupt
NMI
NMITRAP
00’0008h
02h
II
Stack Overflow
STKOF
STOTRAP
00’0010h
04h
II
Stack Underflow
STKUF
STUTRAP
00’0018h
06h
II
Class B Hardware Traps
Undefined Opcode
UNDOPC
BTRAP
00’0028h
0Ah
I
Protected Instruction Fault
PRTFLT
BTRAP
00’0028h
0Ah
I
Illegal Word Operand Access
ILLOPA
BTRAP
00’0028h
0Ah
I
Illegal Instruction Access
ILLINA
BTRAP
00’0028h
0Ah
I
Illegal External Bus Access
ILLBUS
BTRAP
00’0028h
0Ah
I
Reserved
[2Ch –3Ch]
[0Bh – 0Fh]
Software Traps
TRAP Instruction
Any [00’0000h– 00’01FCh]
in steps of 4h
Any [00h – 7Fh] Current CPU
Priority



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