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Power up TB-96AI - TB-96AI - 96Boards Forum

Power up TB-96AI

Products Support TB-96AI
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#1

Hi!

I post a message here because I bought a TB-96AI recently with a carrier board, but I have a problem to make it works.
I was making a PCB for test it, but I was unable to power up the board.
Base on the carrier board and the SOM schematics I connect all the “VCC5
V0_SYS_S3” on my 5V power input, All GND pins to the ground and a button to “PWRON” to power on the RK809. But nothing happens. Does anyone know which pin is mandatory to wire to power up the board? Any document maybe?
I have seen on the carrier board schematics some pin (BOOT_CS1 for example) that are not present/connected with the TB-96AI or even on the TB-96AIOT. Maybe some of there pins are mandatory?

PS: I tried also to power up the TB-96AIOT but same story.

Thanks for your response.

#2

Look at System Management pins:

I think you need to have VDC_PWRON (X1-pin 24) and PWRON (x1-pin 27) and SOC_POR_RST/RESET_L (x1 pin 17) connected.

#3

Thanks for your response, I will try today.
I haven’t seen this doc, it will be useful thanks.

#4

Hello,

After many try, I’m still unable to boot the board. As I readed VDC_PWRON and PWRON has the same effect (power up the PMIC RK809).With 0.55V on VDC_PWRON the PMIC is supposed to startup. I try also BOOT_CS combinaison like BOOT_CS0 Floating,BOOT_CS1 GND, BOOT_CS3 GND but nothing.
It’s not really clear in the spec how BOOT_CS must be pluged (GND ? float ? 1.8V ?).
Sure I miss something, any idee ?

Thanks

#5

I believe this issue is resolved via email - please let me know if otherwise.

If the resolution is acceptable - please post here for others benefit as well.

Thanks

#6

Hi yang, unfortunately i’m still unable to power up it. If you have any suggestion, let me know.

#7

Do you give the VCC_RTC_S5（X1 Pin 28） power supply？VCC_RTC_S5 power supply must be powered on, and the power on sequence must be no later than VCC5V0_SYS_S3。If VCC_RTC_S5 does not supply power, PMIC of SOM board may be damaged。If it is not necessary to keep RTC time after shutdown, VCC_RTC_S5 and VCC5V0_SYS_S3 can be connected together。The voltage range of VCC_RTC_S5 is 3.0V ~ 5.5V.
Another point to be noted is that if the VDC_PWRON（X1 Pin24）is not pulled up, it is necessary to pull down the PWRON(X1 Pin27) for a short period of time before the system can be started.