mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 99

• Manufacturer Part Number: mcf5407
• Description: Mcf5407 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

The 16-bit format/vector word contains three unique fields:
+ 0x04
A7→
• Format field—This 4-bit field at the top of the system stack is always written with a
• Fault status field—The 4-bit field, FS[3–0], at the top of the system stack is defined
• Vector number—This 8-bit field, vector[7–0], defines the exception type. It is
value of {4,5,6,7} by the processor indicating a 2-longword frame format. See
Table 2-20. This field records any longword misalignment of the stack pointer that
may have existed when the exception occurred.
for access and address errors along with interrupted debug service routines. See
Table 2-21.
calculated by the processor for internal faults and is supplied by the peripheral for
interrupts. See Table 2-19.
31
0101–011x
1101–111x
FS[3–0]
Format
0000
0001
0010
0011
0100
1000
1001
101x
1100
Original A7 at Time of
Exception, Bits 1–0
28
Not an access or address error nor an interrupted debug service routine
Reserved
Interrupt during a debug service routine
Reserved
Error on instruction fetch
Reserved
Error on operand write
Attempted write to write-protected space
Reserved
Error on operand read
Reserved
Figure 2-1. Exception Stack Frame Form
00
01
10
11
27
FS[3–2]
Table 2-21. Fault Status Encodings
Table 2-20. Format Field Encoding
26
25
Vector[7–0]
Chapter 2. ColdFire Core
Program Counter [31–0]
A7 at First Instruction of
18
Original A[7–10]
Original A[7–11]
Original A[7–8]
Original A[7–9]
17
FS[1–0]
Handler
Definition
16
15
Exception Processing Overview
Format Field Bits
Status Register
31–28
0100
0101
0110
0111
2-33
0