- 03 Jul, 2018 3 commits
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Eric Kuzmenko authored
Move the VBUS TVS diode and bypass caps and place copper pour on the respective pad areas, the VBUS rail has a 6mm wide fill zone in order to properly handle ~4.3A with a <10degreeC temperature rise (should also do this when bring VBUS to the charge controller), make the In4.Cu layer a solid ground layer
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Eric Kuzmenko authored
Move CAPTOUCH_~RST from BOOT_CFG_03 to GPIO1_IO05/P3.33 (was CSI_P2_PWDN), add a 10k pull-down to LCD_~RESET, make the corresponding changes to the BoM and netlist/layout Having CAPTOUCH_~RST on BOOT_CFG_03 caused a voltage divider on the pin.
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Eric Kuzmenko authored
Route the PTC polyfuse that's on the VBUS rail using a copper pour on the In4.Cu layer, route the USB-C's shielding to parallel 0Ohm and NC cap to GND, add a power net class, add a 0.508mm annular ring 0.254mm drill via for power nets
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- 02 Jul, 2018 1 commit
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Eric Kuzmenko authored
Re-route the differential tracks going from the USB-C switch IC to the EMI&TVS ICs along with some of the passives around the USB-C switch chip (similar placement to EmCraft's), add a 1uF cap to the EN pin of the 2.8V LDO in order to introduce a small (~10ms) delay between the 1.8V rail coming up and the 2.8V rail
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- 30 Jun, 2018 1 commit
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Eric Kuzmenko authored
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- 29 Jun, 2018 3 commits
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Eric Kuzmenko authored
Rename all diff pairs such that they end in _P/_N rather than just P/N (underscore needed for diff pair routing)
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Eric Kuzmenko authored
Make the ETH PHY's crystal's load capacitors 27pF instead of 22pF, Cstray should now be 3.5pF instead of 7pF
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Eric Kuzmenko authored
Move USB-C, Mini-HDMI, RJ45, and 3.5mm jack receptacles to the bottom of the board, also place the Micro-SD card slot to the left of all of the receptacles centered at the bottom, place the Smart-Card slot just above the Micro-SD card facing the left, add 3D models to each of the respective connectors/sockets The order of the various receptacles and sockets can be changed bit the pitch between them should stay about the same since it is currently as tightly packed asreasonably possible (1.5~2.5mm clearance between connectors).
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- 28 Jun, 2018 5 commits
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Eric Kuzmenko authored
Replace resistors which have specific values that can be converted to more common values in order to reduce the total number of unique BoM line items
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Eric Kuzmenko authored
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Eric Kuzmenko authored
Replace the VCNL4040 proximity+ambient light sensor's 470nF bypass cap on VDD with a 1uF one to reduce the number of BoM line items, also replace the USB Hub+SDIO bridge chip's SDCD cap between the P-MOSFET's gate and drain with an 18pF capacitor instead of a 10pF for the same reason (reduce number of BoM line items)
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Eric Kuzmenko authored
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Eric Kuzmenko authored
Make some minor fixes to various components' properties and update the BoM with the respective changes, sort the BoM based on reference designator and value
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- 27 Jun, 2018 2 commits
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Eric Kuzmenko authored
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Eric Kuzmenko authored
Replace SZMM5Z3V3T1G with MMSZ4688 zener diode which has a higher reverse working voltage to ensure that HP_DET is at a strong HIGH level when headphones/headset are inserted into the jack, replace its SOD-523 footprint with the corresponding SOD-123 footprint from the spec sheet's recommended land pattern
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- 26 Jun, 2018 1 commit
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Eric Kuzmenko authored
Replace camera's schottky+resistor level-shifter circuit with the more functional TXB0101 dedicated IC
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- 25 Jun, 2018 3 commits
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Eric Kuzmenko authored
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Eric Kuzmenko authored
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Eric Kuzmenko authored
Assign placeholder footprints to WWAN antennae (identical to GNSS ones for now), add haptic motor schematic symbol and split up the connector and motor footprints, now ready to generate netlist and import it into Pcbew without errors
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- 24 Jun, 2018 2 commits
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Eric Kuzmenko authored
Add proper WWAN reset circuit using a MMBT2222A NPN BJT along with a 100nF cap and a TVS diode, make needed adjustements to the WWAN's SIM card circuit (UIM-CLK and UIM-RESET caps are NC & added 4.7k series resistor to SIM_DETECT_O#), assign the MMBT2222A footprint to KiCad's official SOT-23 footprint (identical to the spec sheet's recommended land pattern) If necessary, the NC cap pads on UIM-CLK and UIM-RESET can be tested with various values during the first prototype debugging phase.
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Eric Kuzmenko authored
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- 23 Jun, 2018 1 commit
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Eric Kuzmenko authored
Add pull-up resistor to nCS pin of the NOR flash chip, make electrolytic caps tantalums again due to a the price difference not being significant
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- 22 Jun, 2018 4 commits
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Eric Kuzmenko authored
Add mounting holes to the schematic and assign the associated M2 hole footprint, add fiducial marks to schematic and assign the associated 1mm diameter copper with 2mm diameter solder mask opening footprint, make various visual adjustments throughout the schematic
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Eric Kuzmenko authored
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Eric Kuzmenko authored
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Eric Kuzmenko authored
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- 21 Jun, 2018 2 commits
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Eric Kuzmenko authored
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Eric Kuzmenko authored
Replace WWAN M.2 circuit with one intended for mPCIe modules, include 74LVC1G08 single 2-input AND gate, create the AND gate's footprint and use the official SOT-23-5 3D model The mini-SIM slot will need to be replaced with one that has an active-LOW detection pin. Will want to see if we can find cheap electrolytic to replace a few of the tantalum caps with (not all since we still need some low ESR, high capacitance, low profile, caps).
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- 19 Jun, 2018 3 commits
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Eric Kuzmenko authored
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Eric Kuzmenko authored
The only difference between these two part numbers is the reel the chip comes in, both are identical ICs.
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Eric Kuzmenko authored
Add BLM18PG121SN1D chip ferrite beads to the GNSS, proximity+ambient light sensor, and IMU +3.3V power pins
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- 17 Jun, 2018 1 commit
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Eric Kuzmenko authored
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- 15 Jun, 2018 7 commits
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Eric Kuzmenko authored
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Eric Kuzmenko authored
Add the BQ25896 charge controller's missing pins which may make the schematic a bit ambiguous, reduce the value of the VBAT_REG LED's current limiting resistor to 1k in order to make it a bit brighter This commit is thanks to our design reviewer's feedback.
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Eric Kuzmenko authored
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Eric Kuzmenko authored
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Eric Kuzmenko authored
Move the ground connection on the USB-C receptacle from the shield pin to the GND pins (shield is still connected to GND via the 0 ohm resistor), make the cap between the receptacle's GND and shield NC This commit is thanks to the feedback from our design reviewer
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Eric Kuzmenko authored
Add AC coupling caps to the HDMI_AUXP/N diff pair which were mistakenly left out, fix a couple typos/errors that were made when transitioning to the new top-leve sheet, make the M.2s' I2C RX TX hierarchical signals consistent and clearer Hopefully all lingering errors have been caught, this will likely be the schematic commit that gets reviewed (fingers crossed).
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Eric Kuzmenko authored
Assign TLV3201AIDBVR footprint based on the SOT-23-5 official footprint using the given solder mask clearance and pad clearance parameters, assign the QFN48 3D model to the ETH PHY footprint, make some minor adjustments to the front sheet's layout
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- 14 Jun, 2018 1 commit
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Eric Kuzmenko authored
Create AP22814 footprint and assign it to the respective symbols, use DFN-6-1EP_2x2mm_Pitch0.65mm 3D module for AP22814
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