Other Parts Discussed in Thread: TDA4VM
Tool/software:
Hello TI export,
The reset of EMMC comes out from T6 of TDA4VM. The below is our test waveform. After power-on, RST will be briefly pulled high (lasting about 140~200us) and then pulled low. After being low for about 9.5ms, it will be pulled high again, and will continue to be pulled high for 360~380ms. It will be briefly pulled low (lasting 140us) and then pulled high again (always high).
Q1: Why is there an action of pulling low at about 400ms, delaying 140us and then pulling high?
Q2: Can we control this pin?
Best Regards
Juanli Zhang