Contents: [Dobrica Pavlinušić's random unstructured stuff]
• Dobrica Pavlinušić's random unstructured stuff (links) 
• Dobrica Pavlinušić's random unstructured stuff (chubby75) 
• Dobrica Pavlinušić's random unstructured stuff (original protocol) 
• Dobrica Pavlinušić's random unstructured stuff (replace level shifters to get input) 
• Dobrica Pavlinušić's random unstructured stuff (chiselwatt) 
• Dobrica Pavlinušić's random unstructured stuff (litex) 
• Dobrica Pavlinušić's random unstructured stuff (fpga pin mapping) 
• Dobrica Pavlinušić's random unstructured stuff (fpga images) 

Board version: v7.0
• Lattice ECP5 LFE5U‑25F‑6BG256C (product page )
• Winbond 25Q32JVSIQ, 32 Mbits SPI flash (datasheet )
• 2x Broadcom B50612D Gigabit Ethernet PHYs (datasheet )
• 2x ESMT M12L16161A‑5T 1M x 16bit 200MHz SDRAMs (organized as 1M x 32bit) (datasheet )
• 12x 74HC245T Octal Bidirectional Transceiver (used for level translation to 5V)

links
• https://hackaday.com/2020/01/24/new‑part‑day‑led‑driver‑is‑fpga‑dev‑board‑in‑disguise/ 
chubby75
• https://github.com/q3k/chubby75/tree/master/5a‑75b 
• upstream: https://github.com/tomverbeure/chubby75/tree/5a‑75b/5a‑75b 
• upstream for v7 board: https://github.com/miek/chubby75/blob/5a‑75b‑v7_pinout/5a‑75b/hardware_V7.0.md 
original protocol
• send data to original fpga image: https://github.com/FalconChristmas/fpp/blob/master/src/channeloutput/ColorLight‑5a‑75.cpp 
replace level shifters to get input
• https://twitter.com/edu_arana/status/1231466891354525698 
https://twitter.com/Claude1079/status/1231194849350647808 
SN74CBT3245APW 8bit bidirectional FET switches
 QS3245QG

chiselwatt
https://github.com/antonblanchard/chiselwatt/commit/5a7fcbc8142ed2b390e1f8bfaaa801fe09a60351 
UART RX is on J19, labelled key+ on the silk screen on the back
 UART TX is on J1, pin 1.
LOCATE COMP "clock" SITE "P6";
LOCATE COMP "io_tx" SITE "F3";
 LOCATE COMP "io_rx" SITE "M13";
litex
basic example of litex on colorLight 5A‑75B based on fpga_101/lab004
• https://github.com/trabucayre/litexOnColorlightLab004/ 
• https://github.com/NiklasFauth/colorlight‑led‑cube 
• https://github.com/ghent360/riscvOnColorlight‑5A‑75B 
fpga pin mapping
https://twitter.com/adamgreig/status/1297255957320421383 
I don't want to load a new image onto this totally blind, so I used the prjtrellis tools (https://github.com/YosysHQ/prjtrellis/ ) to write a script (https://github.com/adamgreig/cl/blob/master/pins.py ) which works out input/output/bidi for all pins used in any ECP5 bitstream. It found only one unused pin...
https://github.com/adamgreig/cl/blob/master/pins.py 
fpga images
• https://github.com/suglover/5a‑75x‑images 
• ecpprog (FTDI jtag probe): https://github.com/gregdavill/ecpprog