readme update

README.md

@@ -8,56 +8,56 @@ it is better explained when drawn in kicad:
 
     kicad ulx3s.pro
 
-Currently this is only partial schematics and partial floorplanning.
-PCB is not routed. Some footprintes are collected and some are incomplete.
+Schematics and PCB floorplanning are mostly complete.
+PCB routing is not complete (about 50 routes missing).
 
-An overview if the parts will fit in the space
-how it will look.
+# Features
 
-From production of this, we are far, far away :)
+Power: Switching voltage regulators
 
-# Features
+Low power: RTC clock wakeup, quartz and battery
+
+USB: FTDI FT231XS (1Mbit JTAG and 3Mbit usbserial)
+
+GPIO: All differential, PMOD-friendly
 
-3.5 mm jack footprint
+RAM: SDRAM
 
-Switching voltage regulators
+Flash: SPI flash chip for FPGA config
 
-USB footprints without thru-holes
+Storage: Micro-SD slot
 
-SPI OLED placeholder (thru hole probably)
+LEDs: 16 (8 blink-LEDs, 2 USB leds)
 
-FTDI 2232 usb-jtag chip
+Buttons: 6 (4 direction and 2 fire buttons)
 
-SPI flash chip
+Audio: 3.5 mm jack footprint
 
-SDRAM chip
+Video: GPDI connector with 3.3V-5V I2C bidirectional level shifter
 
-LEDs: 8 blinkleds, 1 usb led
+Display: placeholder for 0.96-1.3" SPI OLED COLOR or B/W
 
-RTC clock, quartz and battery
+WiFi+bluetooth: placeholder for ESP-32 (JTAG and serial over WiFi possible)
 
-3.3V-5V I2C bidirectional level shifter for GPDI
 
 GPDI is General Purpose Differential Interface,
 Electrically LVDS, mostly TMDS tolerant
 female receptacle more-or-less compatible
 with digital monitors/TVs
 
-# Todo
-
-Completing FPGA IO bank shcematics blocks
+# Board
 
-Check SD card slot footprint
+Schematics
 
-Oscillators (25/50/100 MHz)
+[schematics](/doc/schematics.pdf)
 
-rearrange PushButtons: 6 (2+4)
+3D preview
 
-             U
-    A B    L D R
+![TOP](/pic/ulx3st.jpg)
+![BOTTOM](/pic/ulx3sb.jpg)
 
-IR camera placeholder
+# Todo
 
-OV767 color camera placeholder
+Improve Power supply routing
 
 2.54 mm external JTAG header