Freescale Semiconductor StarCore SC140 - Manual (Page 135)

EOnCE Module Internal Architecture
SC140 DSP Core Reference Manual 4-25
4.5.3.3 Optional External Event Detection Address Channels
The EDU has two ports to optional external event detection channels named EDCA6 and EDCA7. If
needed, the system designer may add additional event detection capabilities to the EOnCE using these
ports. These outcomes of EDCA6/7 events could include the following:
— Placing the core in debug state
— Generating a core debug exception
— Enabling the trace logic
— Disabling the trace logic
— Generating a counter event
— Combinations with other events in the event selector
— Setting the debug reason bits in ESR and the event status bits in EMCR
EDCA6 and EDCA7 do not have an EE pin associated with them.
4.5.4 Event Selector (ES)
The ES selects the source for various debugging operations. The possible sources that can be selected are:
• Outputs of EDCA instances
• Outputs of optional external EDCA events
• Output of the EDCD
• Output of the event counter
• EE signals
• DEBUGEV instruction
Each of these source events could be programmed
1
in the event selector to cause some or all of the
following actions:
• Entry into Debug state
• Execution of a Debug exception
• Enable or disable program tracing
1. They can be programmed individually or combined with other simultaneous events