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@ -10,7 +10,12 @@ board release 3 with SDRAM, Successor of
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kicad ulx3s.pro
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[Schematics](/doc/schematics.pdf) is mostly complete.
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PCB routing is mostly complete too.
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PCB routing is mostly complete too. PCB produced when at version 1.7
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and big things work like USB-JTAG, SDRAM, SDCARD, HDMI.
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PCB v1.7 has small issues like SHUTDOWN not connected,
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WIFI won't work if its pins to SDCARD are connected, WIFI disable
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jumper won't work if wifi enable is held high by FPGA.
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FLASH, AUDIO, RTC, I2C, OLED are currently untested.
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3D preview
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@ -21,7 +26,7 @@ PCB routing is mostly complete too.
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FPGA: Lattice ECP5 LFE5U-45F-6BG381C
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USB: FTDI FT231XS (1Mbit JTAG and 3Mbit USB-serial)
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USB: FTDI FT231XS (300kbit JTAG and 3Mbit USB-serial)
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GPIO: 56 pins (28 differential pairs), PMOD-friendly
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@ -39,7 +44,7 @@ Audio: 3.5 mm jack with 4 contacts (analog stereo + digital audio or composite v
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Video: GPDI connector with 3.3V-5V I2C bidirectional level shifter
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Display: placeholder for 0.96-1.3" SPI OLED COLOR or B/W
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Display: placeholder for 0.96" SPI COLOR OLED
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WiFi+bluetooth: placeholder for ESP-32 (JTAG and serial over WiFi)
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@ -129,3 +134,6 @@ Make the prototype.
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[ ] ESP-32: GPIO12 at boot selects internal flash voltage,
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it is connected to J1_27+ and wrong pullup/pulldown at boot
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will prevent ESP32 from booting
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[ ] ESP-32: won't boot when SD connected. Don't solder it at PCB v1.7
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it should be routed differently in newer release
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davor
7 years ago