Part Number:TPL5010
By mistake, I configured CC1310 pin connected to WAKE as output and high level. It will pull WAKE pin to about 700mV when LOW (5mA flowing into WAKE). In this situation(with DONE low), only one RSTn is generated after power-up, then WAKE signal is asserted repeatedly.
This behaviour is a bit confusing and may prevent correct watchdog behavior if some (unlikely) glitch configures pin as output ...