Imported from GitHub: dennowiggle/Retro-PETER · commit 97a6c90 · license LGPL-2.1

Description

3.3V Retro computer project => FPGA + RCBUS + CPU boards making a custom system.

README

BUTLER

Backplane with Universal Translation Logic for Exploring Retro

Description

BUTLER is an RCBUS backplane board with voltage translation logic. It has 2 connectors for 3.3V cards and 3 connectors for 5V cards.

The buffer direction control signal comes from the PETER FPGA. The card uses three backplane signals for GND as well as GND planes to try and improve signal integrity.

Top View

Bottom View

BUTLER Board Rev 0.0 Release Notes

1. The output directory contains the BOM, netlist, and PDF schematic.

2. Board design used KiCad 9.0

BUTLER Future Changes.

1. Replace U505 5V LDO with TRACO POWER TSR 1-2450 or equivalent that has a wide input voltage operating range and is a switch mode power supply. This has been tested on the prototype as rework and worked well.

Notes

Only preliminary testing has taken place.