Renesas Technology, Tools FAQs
Last Updated: December 20, 2001
Document Number: 01120503_e
Q.
When debugging the operations in just one sub-block using emulation pod M306N0T2-PRD-E (for M16C/6N Group), the UART,
timers, and other peripheral functions still operate normally even though the main clock is stopped. (These functions did stop in the
evaluation MCU). Why is this happening and what is the work-around for this problem?
A.
We don't have a work-around method for this problem.
This occurs in all M16C/80, M16C/60, and M16C/20 Series' emulation pods, not just in the M306NOT2-PRD-E. Even when the
main clock stop bit is set, peripheral functions that use the internal clock as the count source, etc. continue to operate.
The internal clock is continually supplied to the peripheral functions of the emulation pod for the following reasons.
When using the emulation pod, the clock must be input in square-wave form to the evaluation MCU XIN.
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When the main clock stop bit is concurrently set in both the evaluation MCU and the target MCU and an oscillator is
connected between XIN and XOUT, the clock buffer stops and there is no oscillation, but when a square-wave is input to
XIN, the XIN signal is supplied to the internal clock.
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