exxos's Atari, Amiga & retro forum

(work in progress)

BOM

Integrated Circuit
IC1 - LM1117 - 3.3V
IC2 - XC9572XL - 64pin
IC3 - STM32F722 or STM32F730 - 64pin (not potential future upgrades would be possible on f730 - only usb hid functionality)
IC4 - THS7314D

Diode
D1 - BAT54

Capacitors
C10,C11,C23,C24 - 22pF 805
C22 - 4.7uF 805 (this one has to be good quality)
C1, C13 - 10uF - 1206
All other C - 100nF - 805

LEDs
LED1 - LED 805
LED2 - LED 805

Resistors
R1 - 4k7 1206
R2 - 100k 805
R3,R4 10k 805
R5,R6,R7 - 50R - 805 (This might need to be adjusted to personal preferences if it is too bright, lower values should result in darker display)

Fuses
F1,F2 - 1206 fuse

Connectors
USB Stacked 2.0 A Type
DB23 Male connector
Edge Connectors - Mouser No:571-5650092-1 Mfr. No:5650092-1

X1 - 5032 - SMD-CRYSTAL-25MHZ-20PF-20PPM(2P-5.0X3.2MM) - 2 pad
X2 - 3215 SMD 32.768KHZ 3.2*1.5 2P - 2 pad

Battery holder
CH24-1220 "Multicomp"

Some standard 2.54mm pin headers for JTAG, BOOT and stm32 programming header

Programming ICs

Programming STM32
Programming can be done using ST LINK V2 (can be cheap knockoff device).
Connection to top right header like this Programming CPLD
Raspberry Pi can be used to program this cpld documentation is availiable for programming other TF cards.
Header Firmware and software
https://github.com/arkadiuszmakarenko/T ... r_binaries


Start

Set up boot jumper on boot header in bottom right position

I will pull out the assembly files i submitted for his build.

terriblefire wrote: 12 Jan 2021 19:41 I will pull out the assembly files i submitted for his build.

That would be great, thank you.

arkadiusz.makarenko wrote: 12 Jan 2021 20:12

terriblefire wrote: 12 Jan 2021 19:41 I will pull out the assembly files i submitted for his build.

That would be great, thank you.

Did you move any components on that last run you did?

terriblefire wrote: 12 Jan 2021 20:21

arkadiusz.makarenko wrote: 12 Jan 2021 20:12

That would be great, thank you.

Did you move any components on that last run you did?

Just tiny little bit battery, but now I am not 100% sure if I can place screw in place (need to find it!).
Putting battery in original position was very difficult, just 1-2mm solved the issue.

arkadiusz.makarenko wrote: 12 Jan 2021 20:29

terriblefire wrote: 12 Jan 2021 20:21

Did you move any components on that last run you did?

Just tiny little bit battery, but now I am not 100% sure if I can place screw in place (need to find it!).
Putting battery in original position was very difficult, just 1-2mm solved the issue.

Ok then the assembly files should work fine.

I am thinking of building one of these for me. Could you tell me where did you buy the battery holder and if there is a component code for mouser/digikey etc. I tried searching for 1220 holders but none of them seem the right fit.

alenppc wrote: 07 Feb 2021 15:45 I am thinking of building one of these for me. Could you tell me where did you buy the battery holder and if there is a component code for mouser/digikey etc. I tried searching for 1220 holders but none of them seem the right fit.

Look for Ch23-1220 Multicomp. I bought mine from china via eBay here
https://www.ebay.com/itm/381374588762

Thanks, I'll order it from ebay. For the ARM, will this one work?

STM32F722RET7

Thanks again.

alenppc wrote: 08 Feb 2021 02:09 Thanks, I'll order it from ebay. For the ARM, will this one work?

STM32F722RET7

Thanks again.

Yes, this is ok.