Hi Jacky, Channel 1 in Figure 10 appears to be capturing the TSM (timing state machine) clock signal. After analyzing the initial settings of the TSM registers shown in Section 4.5 in SLAA639 , Point 2 in Figure 10 shows 5 cycles of the TSM clock sourced from the high frequency clock source. At Point 3, the TSM clock is sourced by the low frequency clock, ACLK. To observe this signal on a scope, you can utilize the ESITEST4 pin by selecting the TSM clock signal with the ESITEST4SEL bits in the ESIPSM register. Please see Section 31.3.16 and Figure 31-13 (shown below) in the User's Guide . Please let me know if you have any more questions. Regards, James MSP Customer Applications
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