987aefa1fd
schematics: routing FPGA to SPI QUAD.
...
BTN_R,U connected to BANK2,3 on "ram" sheet
6 years ago
e81d05b68d
schematics: renaming pins J..+- to GP,GN..
6 years ago
5c44068917
schematics: LED power saving for weak IO bank drivers, all resistors 1k.
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Who needs more light he needs hi-efficiency LEDs.
6 years ago
6228263ac6
schematics: additional diode R23 to make shutdown more reliable
...
reduce hold resistor, use schottky for nSLEEP
6 years ago
5065b98876
schematics: change value LED resistors 330->470 ohm for power saving
6 years ago
006cac18f6
schematics: comment TXLED blinks when ftdi_rx receives data
7 years ago
4298d197d1
schematics: small cleanup
7 years ago
b41c200d79
schematics: cosmetics, hidign some button datasheet URL for schematics
7 years ago
f4d7692c91
schematics: SD card symbol with 2 CD pins connected to GND
7 years ago
c87e9f6c4c
schematics: renumbering dipswitch pins to match writing on the
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part, pins 1-4 from left to right
7 years ago
3915779e0c
schematics: part numbers and URLs of datasheets and manufacturers
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of most chips and connectors. Small parts not done yet.
7 years ago
52814d6ae0
WIFI LED (blue) on schematics
7 years ago
7cebd0afa5
changing DAC resistors 100-820 ohm -> 150-1200 ohm
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few 220 ohm resistors changed to 150 ohm to simplify BOM
7 years ago
ba4c8e8d22
PCB v1.6 SDRAM fully reworked
7 years ago
af531b0fd5
LED values renamed to RED and GREEN
7 years ago
220f575442
schematic "power" sheet and footprint cosmetics
7 years ago
e4fc99887e
moving GND and VCC on schematics symbols to
...
common locations for planned PCB which
supports upgrade path for example
12F->25F->45F->85F and if possible ECP5U->ECP5UM
7 years ago
07de158d38
R56 for FT231X rev A,B,C workaround from TN140_FT231X Errata
7 years ago
35598e53fb
FT231X workaround blues
7 years ago
f3d84dbfdc
LED D19 was oriented wrong, now correct
7 years ago
d0cf4eaeaf
DIP switch correct footprint
7 years ago
bcf94bafab
buttons footprints correct now
7 years ago
fdf38ad9a1
DIP switch moved to the right, near RAM.
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Maybe should be moved more to the right not to overlap with OLED
7 years ago
236f63488a
DIP SWITCH routed
7 years ago
6d14ed8ff0
Placing DIP switch, but not yet connecting it to FPGA
7 years ago
32836831ae
i2c of RTC connected to GPDI i2c
7 years ago
2153a220a0
schematic symbol for ADC MAX11123
...
small PCB traces cleanup
ADC chip placed on PCB but connected only to GND
7 years ago
be09416928
Add 27 ohm resistors in series with FTDI USB and readme update
7 years ago
ee7d266543
Resistors for LEDs
7 years ago
238ad770ce
moving USB LEDs on TOP layer
7 years ago
b7500cc477
increasing thickness of power traces, moving clock
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to a bank which is always at 3.3V
7 years ago
2a60828a99
schem. pullup 1.5k for USB 1.1 full speed mode
7 years ago
23b588ff16
Routing... 4 routes remaining
7 years ago
0f9d00f602
Buffer capacitor for SDRAM
7 years ago
1f60f95a71
compatible OLED models: SSD1306 or SSD1331
7 years ago
1e5e0b01a6
connecting JTAG lines to FTDI serial lines RI DCD CTS DSR
...
as those pins are by default inputs and can be reconfigured as outputs
similar but not identical pinout as the one that works from ujprog
CBUS used to force-wakeup of the board from sleep state
2 LEDs to CBUS pins to display usb enumeration and activity status
7 years ago
c297a5294f
adding 25 MHz oscillator and moving some parts around
7 years ago
12e89e677a
connecting wifi, usbserial, oled, sd card
7 years ago
a477fbd050
connecting flash config chip
7 years ago
85cb0b3f93
Placing 40-pin connectors side-by-side,
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changing ft2232 to ft231x
7 years ago
a7de1a4e58
power button
7 years ago
4f3fabdb5f
oled updated on the schematic and PCB
7 years ago
b1062e5795
place oled symbol on pcb
7 years ago
6639abded3
add 4 mounting holes
7 years ago
b661cacede
Change to 2x20 pin headers, PCB layout currently sub-optimal
7 years ago
f9ba6fa20b
chage ESP8266-12E to ESP32S
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approximate (maybe incorrect) connections - need review
(programming esp from fpga, jtag, sd, chip enable)
7 years ago
a0dae5bb6a
another diode to duscharge C14 at shutdown
7 years ago
cf01d5cc8d
Power: Replace discharge resistor which leaks with
...
a diode for discharge C at shutdown
HDMI pin 0 is now the shield and connected to GND
7 years ago
dc6ea57d67
Label button pullup net "BTNPU"
7 years ago
23c4cde741
GPDI I2C 5V level shifter
7 years ago
davor