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wsiaxel
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WLCSP package on 2-layer PCB stack

Hi
For the WLCSP package the inner ring connections ( P0_1, P0_2, P0_4, P0_7 , P1_0, P1_1, P1_2 and P1_3 )
can only be used with a Multi-layer PCB with micro vias.

I would like to use the WLCSP package on a two-layer PCB.

There is no micro vias available , how can I program the OTP memory ?
Ususally it's done via the UART at BOOT with one signal in the inner ring..

TN_Dialog
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Joined: 2013-12-05 15:49
WLCSP package on 2-layer PCB stack

Hi,

The right way to use UART on a single layer PCB is to route the inner ball through one of the other inner balls.

One example could be that you connect UART (TX) on P0_4 and UART (RX) on P0_5. To get the P0_4 out can route the signal through P0_7 ball and onto the P0_6 ball.

Regards
Thomas

BB_Dialog
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Joined: 2013-12-05 14:44
WLCSP package on 2-layer PCB stack

Hi WSIAxel,

(answer already provided to you by TW)
I wanted to attach a picture, but that seems not to be possible.

med vänliga hälsningar / best regards, Dialog Support.

wsiaxel
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Ok, I got it. I understand

Ok, I got it. I understand how to do it.
Thanks for the reply

R.Gantner
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Joined: 2014-01-18 13:57
Is it posible to program the

Is it posible to program the OTP via the debug Interface (SWCLK, SWIO) ?

FH_Dialog
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Joined: 2013-12-06 15:12
The UART is standard

The UART is standard interface to program OTP and you can use OTP programming tool in Smartsnippet