Freescale Semiconductor StarCore SC140 - Manual (Page 130)

4-20 SC140 DSP Core Reference Manual
EOnCE Module Internal Architecture
4.5.3 Event Detection Unit (EDU)
The EOnCE EDU capabilities are:
• Event detection on program and data memory address bus range or value
• Event detection on data memory and data bus range or value
• Detection of data written or read to/from a certain data memory address
• Generating an EOnCE event upon event detection
The EOnCE EDU includes six instances of an Address Event Detection Channel (EDCA), one Data Event
Detection Channel (EDCD), and an event selector (ES). In addition, the EDU has an interface that supports
adding two additional EDCAs as external modules outside the EOnCE, thus enabling to expand the
EOnCE address detection capabilities.
The possible events generated by the EDU are:
• Signal to the event selector (entry to debug state, debug exception, enable or disable tracing) - see
Section 4.5.4, “Event Selector (ES).”
• Enable another EDCA or EDCD
• Enable the counter
• Generate a counter event
• Toggle an EE pin (one EE pin assigned to each EDCA or EDCD)