mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 143

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

7.3.2.2
This section presents a brief summary comparing the exception processing differences between the S08
and V1 ColdFire processor families.
Freescale Semiconductor
•
•
•
A 4-bit format field at the top of the system stack is always written with a value of 4, 5, 6, or 7 by
the processor, indicating a two-longword frame format. See
There is a 4-bit fault status field, FS[3:0], at the top of the system stack. This field is defined for
access and address errors only and written as zeros for all other exceptions. See
The 8-bit vector number, vector[7:0], defines the exception type and is calculated by the processor
for all internal faults and represents the value supplied by the interrupt controller in case of an
interrupt. See
S08 and ColdFire Exception Processing Comparison
FS[3:0]
0100
0101
1000
1001
1100
1101
00xx
011x
101x
111x
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Table
of Exception, Bits 1:0
Original SSP @ Time
7-6.
00
01
10
11
Table 7-7. Format Field Encodings
Table 7-8. Fault Status Encodings
Original SSP - 10
Original SSP - 11
Original SSP - 8
Original SSP - 9
Instruction of
Error on instruction fetch
Error on operand write
SSP @ 1st
Error on operand read
Handler
Definition
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Format Field
Table
0100
0101
0110
0111
7-7.
Table
7-8.
ColdFire Core
7-13