A500FU CMD Timeout Error - GSM-Forum

usernome · 01-25-2018, 12:29

What could be wrong ?
I tried with the power from the adapter , with the power from USB , with and without pull-up resistors .

usernome · 01-25-2018, 14:39

Code:

Compression is ON
Z3X EasyJtag Software ver. 2.9.0.0
Loading eMMC GEN1 Firmware... IO: 2800 mV
Box S/N: xxxxxxxxxxxx, ,FW Ver.: 01.62
CMD Pullup Level:3227 mV
CMD Active Level:2835 mV
Box IO Level:2800 mV
CLK Rate:14000 kHz
Bus Width:1bit,SDR
HiPower mode is off!
Can't init device, Reason: CMD Timeout Error 
Done.

Another A500FU .

Tell me what to check , please !

kothamamun · 01-25-2018, 14:52

check connection properly

usernome · 01-25-2018, 14:54

I checked them under microscope .
2 boards with the same error .

**blang** · 01-31-2018, 14:51

Quote:

Originally Posted by usernome

I checked them under microscope .
2 boards with the same error .

provide details about problem - what the status of board.
status of emmc.
did you try remove emmc and check read/write in socket.

what you trying do with board.

vikboston · 01-31-2018, 15:06

Hi,

Please check connection properly.
I can see in log "CMD Pullup Level:3227 mV".
Looks like 3.3V soldered to 1.8V point.
Please, measure real voltage for 1.8 ISP point.

Best Regards

usernome · 02-01-2018, 14:56

Quote:

Originally Posted by blang

provide details about problem - what the status of board.

I have 3 boards dead after downgrade .
They can't be all with dead EMMC's .

usernome · 02-01-2018, 14:58

Quote:

Originally Posted by blang

status of emmc.

I don't know the status of EMMC's but , as I said , they can't be all dead .

usernome · 02-01-2018, 14:59

Quote:

Originally Posted by blang

did you try remove emmc and check read/write in socket.

That's the last solution ...

usernome · 02-01-2018, 15:00

Quote:

Originally Posted by vikboston

Hi,

Please check connection properly.
I can see in log "CMD Pullup Level:3227 mV".
Looks like 3.3V soldered to 1.8V point.
Please, measure real voltage for 1.8 ISP point.

Best Regards

I already said , I checked the connections several times and I have 3 boards .
I can't be wrong on all 3 .

alexid · 02-02-2018, 17:50

Quote:

Originally Posted by usernome

What could be wrong ?
I tried with the power from the adapter , with the power from USB , with and without pull-up resistors .

Check clk or cmd points.....

usernome · 02-02-2018, 19:11

Quote:

Originally Posted by alexid

Check clk or cmd points.....

I have 3 boards ... the same ...

01-25-2018, 14:52	#3 (permalink)
kothamamun No Life Poster Join Date: Apr 2016 Location: B A N G L A D E S H Posts: 3,189 Member: 2556542 Status: Offline Thanks Meter: 1,790	check connection properly

01-25-2018, 14:54	#4 (permalink)
usernome No Life Poster Join Date: Jan 2003 Location: Iassy Age: 59 Posts: 4,314 Member: 19723 Status: Offline Thanks Meter: 359	I checked them under microscope . 2 boards with the same error .

01-31-2018, 15:06	#6 (permalink)
vikboston Product Supporter Join Date: May 2011 Posts: 286 Member: 1569669 Status: Offline Thanks Meter: 257	Hi, Please check connection properly. I can see in log "CMD Pullup Level:3227 mV". Looks like 3.3V soldered to 1.8V point. Please, measure real voltage for 1.8 ISP point. Best Regards