6228263ac6
schematics: additional diode R23 to make shutdown more reliable
...
reduce hold resistor, use schottky for nSLEEP
7 years ago
52d3cced84
schematics: typo in RC shutdown text description
7 years ago
9ab20cb840
specific comments about RC shutdown constant on "power" sheet
7 years ago
766f96a80a
schematics: comments about i2c sharing
7 years ago
afdfad2fa2
schematics: comments about switching regulators
7 years ago
3a87d41201
schematics: additional comments for wifi bootstrapping and readme update
7 years ago
f4d7692c91
schematics: SD card symbol with 2 CD pins connected to GND
7 years ago
5f15062265
schematics: comments on switcher parts corrected
7 years ago
95cb151b39
schematic power sheet: alternatives to AP3429/A, swap U4,U5
7 years ago
5384b84706
schematics: switching regulator alternatives
7 years ago
6cc027aed0
schematics: update inductor PN, swap L2 <-> L3
7 years ago
380fcdf86a
schematic: newly created SOT96-1 used for NXP RTC
7 years ago
e641702054
schematics: start with tape and reel datasheet information
...
(currently done only for RTC)
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
020d7bdfa7
schematics: change core voltage 1.2V->1.1V (RB1 changed 15k->18k)
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FPGA Chip in ULX3S is LFE5U-45F-6BG381C and it needs 1.1V.
5G chips like LFE5U5G-45F-6BG381C would need 1.2V
7 years ago
a5a51a8f28
connected missing SD card pins to esp-32
7 years ago
cca17d282d
open-close to check that everything loads fine
7 years ago
35b3a8b3dd
changing to 45F which is production device now
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schem symbol 45F fixed typo T8->T7 (GND) and SERDES
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
8e94190676
power up note and small cosmetics
7 years ago
050a70079a
move one audio-v pin from bank0 to bank7 so
...
now all audio jack pins are on bank7
7 years ago
6d74bb29fc
PCB v1.7 fix wrong audio jack connection
7 years ago
ba4c8e8d22
PCB v1.6 SDRAM fully reworked
7 years ago
220f575442
schematic "power" sheet and footprint cosmetics
7 years ago
1ea88bda53
Adding pins to schematic symbols for all chips in unit "H" (SERDES)
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Non-serdes chips need GND connection on unit "H".
"power" sheet now connects GND's at unit "H".
7 years ago
fffde2cf88
Additional GND for 85F chips
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
06a8d751d9
Jumpers (default OFF) for 3 switcher voltages
7 years ago
1cdad1e4d0
all diodes SOD-323 and SOD-323F packages changed to handsoldering
...
(bigger pads, more reworkable)
silkscreen moving references GPDI1 and SW1 for readability
7 years ago
10df092413
using modified ECP5 footprint
7 years ago
9cc436ce8c
Additional VCC 2.2uF blocking capacitors near the switching
...
power supply to form PI-filter with another 2.2uF near BGA
7 years ago
68a23c127c
set package SOD323 to all small diodes
7 years ago
f32ace3adf
D15 schottky diode BAT54W package SOD323F
7 years ago
bcf94bafab
buttons footprints correct now
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
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
238ad770ce
moving USB LEDs on TOP layer
8 years ago
b7500cc477
increasing thickness of power traces, moving clock
...
to a bank which is always at 3.3V
8 years ago
2a60828a99
schem. pullup 1.5k for USB 1.1 full speed mode
8 years ago
1a122bfc67
fully routed
8 years ago
23b588ff16
Routing... 4 routes remaining
8 years ago
0f9d00f602
Buffer capacitor for SDRAM
8 years ago
108abc3158
connecting 3.3V and 1.2V
8 years ago
dcbfda0556
Run DRC to update cupper fill zones
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
39dce76f0a
use new schem symbol
8 years ago
davor