sd2snes Mk.II PCB top

Finally the result of 8 months of reconsidering and redesigning.

KiCAD was used as an EDA tool to replace Eagle. The entire layout + schematics were redone from scratch.

 

This new version features:

128Mbit 16-bit PSRAM

4Mbit 8-bit SRAM

200/400kgate FPGA

100MHz 32-bit uC

2 SPI or 1 SPI + 1 SD native (4-bit)

Buttons: Reset, Freeze

LEDs: Ready, Read, Write

2 switching regulators (3.3V, 1.2V)

2 LDOs (2.5V, 1.8V)

Audio DAC

auto region CIC clone

autonomous (async) + SNES (sync) clock

backup battery (e.g. RTC)

Bus connect: A+B Addr + Data

 

Interfaces:

SD-Card

USB

2x UART (1 for ISP)

JTAG

 

Done