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Arek's TF534 build
Posted: 07 Sep 2019 00:04
by arkadiusz.makarenko
My first build. It took me 6h.
Tomorrow I am planning to program it, and hopefully start Diagrom.
Forgot to other 0.1 uF caps.
There is no way that someone could build it without microscope and half decent flux.
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Re: Arek's TF534 build
Posted: 07 Sep 2019 06:13
by 8 Bit Dreams
Hi,
CPU with that mask will probably not work @50Mhz, it will run stable @40Mhz though
Re: Arek's TF534 build
Posted: 07 Sep 2019 06:48
by arkadiusz.makarenko
I have installed 40Mhz crystal here.
Thank you for PCB by the way.
Re: Arek's TF534 build
Posted: 07 Sep 2019 07:18
by 8 Bit Dreams
You are welcome! glad it arrived safely, was worried it will be lost without tracking..
40Mhz should work nice. Please remember Systest will crap out once MMULib is installed, so scan ram with Systest started from ADF or on a system without MMULibs
Re: Arek's TF534 build
Posted: 07 Sep 2019 12:34
by arkadiusz.makarenko
It may be proper failure :D
voltage regulator died (or I killed it) and I can't find cplds on jtag chain ... using raspberry pi
Re: Arek's TF534 build
Posted: 07 Sep 2019 14:39
by 8 Bit Dreams
must be a short somwhere... :shock:
Re: Arek's TF534 build
Posted: 07 Sep 2019 15:51
by arkadiusz.makarenko
I think I killed one of the chips during soldering. Question is which one.
Re: Arek's TF534 build
Posted: 07 Sep 2019 19:11
by PaulJ_2.0
First thing I would check is a short to ground on the 5V rail, check for continuity across the PWR pins.
Re: Arek's TF534 build
Posted: 07 Sep 2019 22:10
by adam
arkadiusz.makarenko wrote: 07 Sep 2019 15:51
I think I killed one of the chips during soldering. Question is which one.
Naah, those cplds die hard:)
Re: Arek's TF534 build
Posted: 08 Sep 2019 11:56
by arkadiusz.makarenko
PaulJ_2.0 wrote: 07 Sep 2019 19:11
First thing I would check is a short to ground on the 5V rail, check for continuity across the PWR pins.
I get OL one way and something around 120ohm when measured other way round.
found first issue - I had crystal installed upside down. :/