MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 599

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

22.14.8.1 OnCE Trace Counter
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
The OnCE Trace Counter Register (OTC) is a 16-bit counter that allows
more than one instruction to be executed in real time before the device
returns to debug mode. This feature helps the software developer debug
sections of code that are time-critical. The trace counter also enables the
user to count the number of instructions executed in a code segment.
The OTC Register can be read, written, or cleared through the OnCE
serial interface. If N instructions are to be executed before entering
debug mode, the trace counter should be loaded with N – 1. N must not
equal zero unless the sequential breakpoint control capability is being
used. In this case a value of zero (indicating a single instruction) is
allowed.
A hardware reset clears the OTC.
DSCK
Freescale Semiconductor, Inc.
For More Information On This Product,
DSO
JTAG Test Access Port and OnCE
Figure 22-13. OnCE Trace Logic Block Diagram
DSI
Go to: www.freescale.com
OnCE TRACE COUNTER
COUNT = 0
JTAG Test Access Port and OnCE
DEC
Functional Description
Advance Information
INSTRUCTION
ISTRACE
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