My TF536 runs at 42.7 MHz with a 100 MHz oscillator.

Lynxman · Post by **Lynxman** » 12 Jan 2021 18:06

Strange.

TF536-02.jpg

My oscillator is a SIT8008BC-83-33E-100.000000T: https://www.digikey.no/products/no?keyw ... 000000T-ND

I have another one I can try instead. I bought two of them.

Lynxman · Post by **Lynxman** » 12 Jan 2021 18:15

I replaced the oscillator and get the same thing. Will try reflashing the CPLD.

EDIT:
Didn't change anything. Would be odd if it did. :)

EDIT:
Tried a 33 MHz (fake) CPU and get the same result.

Post by **alenppc** » 12 Jan 2021 18:27

It really doesn't. Sysinfo is utter garbage. Try AIBB and you'll get way more accurate results.

Lynxman · Post by **Lynxman** » 12 Jan 2021 18:35

AIBB 6.5 says CPU Clock is 40 MHz. :lol:

Lynxman · Post by **Lynxman** » 12 Jan 2021 18:38

I will take another look under the microscope. I know for sure there are no shorts but maybe a pin is lifted.

Post by **terriblefire** » 12 Jan 2021 18:41

Lynxman wrote: 12 Jan 2021 18:38 I will take another look under the microscope. I know for sure there are no shorts but maybe a pin is lifted.

This is not possible. Like i couldnt make the board do that if i tried. It divides the input clock by 2. there is no known way to divide with logic like this.

Either there is an 80 mhz crystal on there, there is some tragic soldering between the CPLD and the CPU or the software is wrong.

Lynxman · Post by **Lynxman** » 12 Jan 2021 18:58

The CPLD solderings are good. I tugged every one of them. I probably received the wrong oscillators. They don't have frequency scribed on them.

Lynxman · Post by **Lynxman** » 12 Jan 2021 19:06

I don't think my solderings are bad. Every single leg has been pushed to check looseness.

TF536-03.jpg

I will order new ocsillators and replace them. I'm glad it still works with the lower frequency.

Post by **alenppc** » 12 Jan 2021 19:22

Yes, it could be an 80 mhz crystal then, but the 536 will generally boot at that frequency only on a specific A500 revision (I think rev5 but not sure anymore), not on the other revs.

Lynxman · Post by **Lynxman** » 12 Jan 2021 19:25

Will let you know how it does with the new parts when I get them. Might as well just leave it at 40 MHz since it works and put it in the A2000. It lets me use the cheap fake 030's. Will runu a raytrace to see if it's stable.

I'm loving the buffered IDE. I have a CF card thatdidn't work properly in my TF534's with a short IDE cable but works great here even with a long cable.

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My TF536 runs at 42.7 MHz with a 100 MHz oscillator.

My TF536 runs at 42.7 MHz with a 100 MHz oscillator.

Re: My TF536 runs at 42.7 MHz with a 100 MHz oscillator.

Re: My TF536 runs at 42.7 MHz with a 100 MHz oscillator.

Re: My TF536 runs at 42.7 MHz with a 100 MHz oscillator.

Re: My TF536 runs at 42.7 MHz with a 100 MHz oscillator.

Re: My TF536 runs at 42.7 MHz with a 100 MHz oscillator.

Re: My TF536 runs at 42.7 MHz with a 100 MHz oscillator.

Re: My TF536 runs at 42.7 MHz with a 100 MHz oscillator.

Re: My TF536 runs at 42.7 MHz with a 100 MHz oscillator.

Re: My TF536 runs at 42.7 MHz with a 100 MHz oscillator.

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