PMF18WE1 Microchip Technology, PMF18WE1 Datasheet - Page 50

• Manufacturer Part Number: PMF18WE1
• Description: PROCESSOR MODULE FOR ICE4000
• Manufacturer: Microchip Technology

Specifications of PMF18WE1

• Module/board Type: Processor Module
• Product: Microcontroller Modules
• Core Processor: PIC18F6585/6680/8585/8680
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: ICE4000
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

MPLAB
6.8
DS51490A-page 44
COMPLEX TRIGGERING EXAMPLES
ICE 4000 User’s Guide
The following examples show some of the ways that complex triggers can be used to
help debug or characterize a problem.
• Sequential Example – Program Memory
• Sequential Example – Data Memory
• Time Between Events Example
• Filter Trace Example – Program Memory
• Filter Trace Example – Data Memory
6.8.1
An application has several subroutines. A particular subroutine (RoutineA) functions
correctly to begin with, but after a time, it begins to function incorrectly. This subroutine
is called many times, so it would be nice to skip the executions where the subroutine
functions properly and breaks just before the subroutine starts to fail. It is observed that
the routine functions correctly until another after subroutine (RoutineB) is called.
This problem can be solved by a Sequential trigger with two events. The first event that
must occur is the execution of RoutineB, so the Event 3 tab is specified with the fetch
of program memory address RoutineB. The trigger should fire when RoutineA is
called, so the Trigger tab is specified with the fetch of program memory address
RoutineA. The Ignore FNOP Cycles is left checked so prefetches are ignored, and
Halt On Trigger is checked so the improperly executing subroutine can be stepped.
FIGURE 6-9:
Sequential Example – Program Memory
SETTING THE FIRST OF TWO SEQUENTIAL EVENTS
 2004 Microchip Technology Inc.