6228263ac6
schematics: additional diode R23 to make shutdown more reliable
...
reduce hold resistor, use schottky for nSLEEP
7 years ago
766f96a80a
schematics: comments about i2c sharing
7 years ago
08e107ae65
schematics: detach SD card connection from ESP32, it won't
...
boot when this is connected.
7 years ago
4298d197d1
schematics: small cleanup
7 years ago
120db49185
schematics: reconnect WIFI_OFF so that jumper has priority
7 years ago
b41c200d79
schematics: cosmetics, hidign some button datasheet URL for schematics
7 years ago
6e63cad6c1
schematics: sdcard correct datasheet url
7 years ago
c87e9f6c4c
schematics: renumbering dipswitch pins to match writing on the
...
part, pins 1-4 from left to right
7 years ago
3915779e0c
schematics: part numbers and URLs of datasheets and manufacturers
...
of most chips and connectors. Small parts not done yet.
7 years ago
186eabc54c
WIFI VSPI schematic connected to JTAG for possible acceleration
7 years ago
52814d6ae0
WIFI LED (blue) on schematics
7 years ago
4a35c95132
GPDI CEC add protection resistor R61 470 ohm
7 years ago
7cebd0afa5
changing DAC resistors 100-820 ohm -> 150-1200 ohm
...
few 220 ohm resistors changed to 150 ohm to simplify BOM
7 years ago
ba4c8e8d22
PCB v1.6 SDRAM fully reworked
7 years ago
eca6978391
HDMI fixed wrong wiring PCB v1.5
...
and improving copper fill areas
7 years ago
af531b0fd5
LED values renamed to RED and GREEN
7 years ago
bc41b3052d
move WIFI disable jumper closer to BTN1
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
bc4b88ee58
Micro SD: using SCHD3A0100
7 years ago
f3d84dbfdc
LED D19 was oriented wrong, now correct
7 years ago
bab7ee607e
placeholder for 1.5k pullup for usb 1.0
7 years ago
9cc436ce8c
Additional VCC 2.2uF blocking capacitors near the switching
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power supply to form PI-filter with another 2.2uF near BGA
7 years ago
f32ace3adf
D15 schottky diode BAT54W package SOD323F
7 years ago
d0cf4eaeaf
DIP switch correct footprint
7 years ago
fdf38ad9a1
DIP switch moved to the right, near RAM.
...
Maybe should be moved more to the right not to overlap with OLED
7 years ago
236f63488a
DIP SWITCH routed
8 years ago
6d14ed8ff0
Placing DIP switch, but not yet connecting it to FPGA
8 years ago
32836831ae
i2c of RTC connected to GPDI i2c
8 years ago
2153a220a0
schematic symbol for ADC MAX11123
...
small PCB traces cleanup
ADC chip placed on PCB but connected only to GND
8 years ago
81b3ea5da0
adding minimal set of 3 2.2uF capacitor for 1.2V, 2.5V and 3.3V
8 years ago
ee7d266543
Resistors for LEDs
8 years ago
18aef04f2c
JTAG header
8 years ago
238ad770ce
moving USB LEDs on TOP layer
8 years ago
23b588ff16
Routing... 4 routes remaining
8 years ago
5590ba802d
optimizing routing for SD and FTDI
8 years ago
752eddee0e
J1 routed using only purple plane, (yellow plane made free)
8 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
8 years ago
3446afcc08
optimizing PCB component placement
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and audio bit ordering
8 years ago
19b884baef
using corrected schem symbol, reordering pins
8 years ago
ec42a18d26
reordering RAM connections to use peripheral pins near SDRAM chip
8 years ago
d6fd30e59c
jumper to disable wifi module
8 years ago
9570c1137b
small edits
8 years ago
c297a5294f
adding 25 MHz oscillator and moving some parts around
8 years ago
a477fbd050
connecting flash config chip
8 years ago
dc1ae11172
partially routed board using "freeroute" autorouter
8 years ago
85cb0b3f93
Placing 40-pin connectors side-by-side,
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changing ft2232 to ft231x
8 years ago
a7de1a4e58
power button
8 years ago
c3889467a0
rename gpio pins same as BGA pin e.g. A9, C11, ...
8 years ago
4f3fabdb5f
oled updated on the schematic and PCB
8 years ago
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