READI Module
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
24-73
message has the second highest priority. Refer to
Section 24.7.3, “Message Priority
,” for further details on
message priorities. The watchpoint message contains the watchpoint code which indicates all the unique
watchpoints have occurred since the last watchpoint message. If duplicate watchpoints occur before the
watchpoint message is sent out, a watchpoint overrun message is generated. The watchpoint source field
will indicate which watchpoints occurred.
The watchpoint message has the following format:
Figure 24-70. Watchpoint Message Format
24.12.1.1 Watchpoint Source Field
The watchpoint source field is outlined in
24.12.2 Watchpoint Overrun Error Message
A watchpoint overrun error occurs when the same watchpoint occurs multiple times before the first
occurrence of that watchpoint has been messaged out. The watchpoint message (which has information of
all the watchpoints that occurred prior to the detection of the same watchpoint occurring multiple times)
will be sent before the error message can be sent.
The overrun error causes further watchpoint occurrences to be ignored, until the error message has been
sent. The error code within the error message indicates that a watchpoint overrun error has occurred. Refer
to
The error message has the following format:
Figure 24-71. Error Message (Watchpoint Overrun) Format
Table 24-32. Watchpoint Source
Watchpoint Source
Description
0bXXXXX1
First L-bus watchpoint (LW0)
0bXXXX1X
Second L-bus watchpoint (LW1)
0bXXX1XX
First I-bus watchpoint (IW0)
0bXX1XXX
Second I-bus watchpoint (IW1)
0bX1XXXX
Third I-bus watchpoint (IW2)
0b1XXXXX
Fourth I-bus watchpoint (IW3)
Length = 12 bits
TCODE (15)
Watchpoint Source
[6 bits]
[6 bits]
TCODE (8)
Error Code (0b00110)
Length = 11 bits
[5 bits]
[6 bits]
Summary of Contents for MPC561
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