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Today is the last day of the work for PCB
12/17/2022 at 06:48 • 0 commentsLooks nice
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Power Lines
12/16/2022 at 14:24 • 0 commentsThere are 6 layers and 9 different power lines. So this is not a trivial task imho
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The Sound Modules Bus
12/16/2022 at 10:51 • 0 commentsThree socket connectors, it is not a PCIe interface even though it uses its connector. It is a specialized sound synthesis bus, the details of which will be published when the development is finished. At this point things can still change.
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The FMC Bus
12/15/2022 at 15:24 • 0 commentsAlmost there are no space to match length for FMC Bus. The good thing is -- is it not large distance and clock speed will be below 100MHz
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The PCB - FPGA Connector to the Bus Drivers Layout
12/15/2022 at 12:16 • 0 commentsI can not call it a perfect wiring, but for the frequencies that will be on the bus is an acceptable result.
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Slots
12/14/2022 at 13:00 • 0 commentsSlot sockets, bus drivers. -- The left half of board.
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Front Panel PCB Side
12/13/2022 at 17:08 • 0 commentsFrom left to right:
1) STLink USB
2) SWD for MCU1
3) Battery holder
4) SD card reader on the back side of the PCB.
5) DSP + QSPI Flash ROM
6) SWD for DSP
7) Reset button
8) Line input
9) Line output
10) Headphone -
SODIMM Bonus
12/13/2022 at 13:19 • 0 comments -
The Expansion Bus
12/12/2022 at 17:33 • 0 commentsThere are three slot slots of 64 pins each. On the far edge you can see the terminating resistors. The bus drivers are on the right side of the picture. The only thing I haven't decided is whether or not to do 5V compatibility. It doesn't make much sense since there is not a single board in the world for this slot. Other than that it is easier to build 3.3V logic today. On the other side of the scale is keeping hardware compatibility with the CPC6128.