UCD9081: power up after power down

Hello

Could you try the sequence instead of sequencer after shutdown under alarm processing of MON1? Follow the below steps

1. select retry 0, and check 1/2/3/4

2.select sequence

Regards

Yihe

yes, but as I wrote

when I release FET on MON1 "1", the device sequence doesn't wake up.

Hello

Please share your settings so that we can assist you further.

Regards

Yihe

I checked it, when I push "0" on MON1 (with checked sequence) all the EN pins are re-sequence all the time. (device 1 and device 2)

I uncheck the sequencer after shut down.

when I push "0" on MON1 all the rail re-sequence until MON1="1" (1.4V)

when I push "0" on MON1 I want that only RAIL1,2,3,4 will be power down sequence and RAIL5,6,7,8 keep working, and afer MON1= "1" (1.4V) I want that only RAIL 1,2,3,4 will do power up sequence.

Thanks, I consider it.

For now on UCD9081, I can power up seq for 2 device separate and power down sequence for 2 device separate but after power down I can't power up 1 device separate without reset the sequencer.

but could I power up sequence with I2C commend after power down 1 device ?  

thanks,

I try to use the "USB Adapter EVM" software for send I2C commends but without success.

I see line in the bottom "Adapter not attached". 

I have WIN10 64.

Hello

Please download and install the fusion GUI(follow this video) https://training.ti.com/fusion-power-designer-download-gui?context=1136655-1139494-1136591

use the low level I2C tool to send commands.(follow this video) https://training.ti.com/fusion-power-designer-low-level-i2c-smbus-debugger?context=1136655-1139495-1136567

Regards

Yihe

Thanks, 

I installed the program and all works fine.

Now I can send write byte and en the ENx of the sequencer.

Suppose that the power sequence up is as in the attached picture:

EN1->EN2->EN3->EN4 (MON1 connected to FET for disable)

and separate 

EN5->EN6->EN7->EN8 (MON5 connected to FET for disable)

Now I open the FET MON1="0" all the EN1,2,3,4 do a power sequence down, and EN5,6,7,8 keep working.

for this situation could I send 1 commend on I2C (write byte) for power sequence up only EN1,2,3,4? or I must to sequence power up EN1,2,3,4 with a lot of commends?

Could you explain more in depth?

And how could I read MONs?

Thank,

After I know the commands package for power up sequence, how could I translate it to my processor? do you have a tool for it?

Thanks,

Another Q I can't understand the calculation of the voltage rail for example I read MON1 resistor from I2C RAIL1H (0x00) and get the value B201, when the Rail voltage is 1.395.

and from the formula VRAILn= 0.00322*VR it's not make sense.

I use voltage reference VCC=3.3V, and there is no PU/PD on the rail.