Freescale Semiconductor MMDS0508 manual Counted Modes, Triggered Modes/Sequential Event Mode

Freescale Semiconductor, Inc.

MMDS Target Component

4.10 Bus Analyzer

4.10.2.4.2 Continuous: Events Only

Stores all the events that you defined in the Triggers page.

4.10.2.5 Counted Modes

In counted modes, data collection stops when the analyzer collects the specified number of frames.

4.10.2.5.1 Counted: All Cycles

Records a specified number of cycles; you can trace that many cycles, of all types.

4.10.2.5.2 Counted: Events Only

Stores all events until it reaches the specified count. Then data collection stops.

4.10.2.6 Triggered Modes/Sequential Event Mode

In triggered modes, the analyzer uses term definitions to track event occurrence, then stop data collection according to some combination of the events. Each term has an associated Pre Event count that counts events for that term. The sequencer condition includes that term, once the count reaches the pre-event count.

The sequencer trigger includes as many as four events, in one of four sequences. Each event has a specified count; each trigger requires that specified count for each event. Each count is a minimum: the event can occur additional times. An event is a pattern of bus signals (which can include address and data values) that logic clips and miscellaneous MCU signals connect to the analyzer. Alternatively, an event can be the negation of a defined pattern. You can define each signal to be asserted, negated, or ignored (don't care).

The sequences are:

4.10.2.6.1 Sequential: A + B + C + D

Select this option to start bus-analyser recording after any event occurs: A, B, C, or D. Data storage ends after the specified number of post-trigger cycles.

4.10.2.6.2 Sequential: A -> B -> C, D<-

Select this option to start bus-analyser recording as soon as events A, B, and C occur, in that order. But if event D occurs before event C, the analyzer must start the whole sequence again with event A. Data storage ends after the specified number of post- trigger cycles. This mode is a simple, three-event sequence, if you do not define an event D.

MMDS0508 Target Interface 4–43

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