Raspberry Pi HAT Design

flux

0:00

Work completed
  • Removed Waveshare connector and associated nets
  • Added raw 2.9" e-paper FPC connector placeholder (J2) with pins Gx, Sx, VCOM, VGL, VGH, VDD, RES, CLK, DIN, CS, AUX
  • Placed TI TPS65185RSLR as the e-paper driver (U6)
  • Added supporting passive components:
    • Capacitors C17, C18, C19, C20, C21
    • Series damping resistor R9 on SCLK
    • Pull-ups R10 on BUSY and R11 on RST
  • Wired PMIC power rails:
    • U6:VGH to FPC VGH
    • U6:VGL to FPC VGL
    • U6:VCOM to FPC VCOM
    • U6:VIN to boost converter 5 V net
    • U6:VIN3P3 to Pi 3.3 V net
  • Rewired Pi SPI and control lines:
    • MOSI, MISO, SCLK (via R9), CS, DC, RST, BUSY remapped to J2 pins
  • Added test points for MOSI, MISO, SCK, CS, DC, RST, BUSY
  • Renamed nets to PANEL_MOSI, PANEL_MISO, PANEL_SCLK, PANEL_CS, PANEL_DC, PANEL_BUSY
  • Documented FPC connector orientation and added layout keepout note: "Maintain 5 mm clearance for high-voltage nets (VGH, VGL, VCOM)"
Success criteria
✅ Waveshare connector replaced with raw FPC connector ✅ High-voltage rails implemented via PMIC ✅ SPI (with series damping) and control signals correctly rewired ✅ ERC passes and BOM placeholders integrated
Next step Prepare PCB layout: review footprints, set up stackup, place components, and run Auto-Layout for routing.
137 days
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J1 GPIO 17 - J2 6
J1 GPIO3 (I2C1 SCL) - U2 SCLK/SCL
C16
Capacitance
Capacitance
U5
J1 GPIO 17 - J2 6
C20
Capacitance
Capacitance
C2 P1 - U1 VI
U2
Not Recommended for New Designs
C3 P2 - L1 P2
J1 GPIO 20 (PCM Data-In) - U4 SD
J1 GPIO 19 (PCM Frame Sync) - U4 WS
R6 P2 - U4 CLOCK
J1 GPIO 10 (SPI0 MOSI) - J2 1
J1 GPIO 8 (SPI Chip Select 0) - J2 4
J1 GPIO 20 (PCM Data-In) - U4 SD
J1 GPIO 9 (SPI0 MISO) - J2 2
C18
Capacitance
Capacitance
J1
J1 GPIO 11 (SPI0 SCLK) - J2 8
J1 GPIO 20 (PCM Data-In) - U4 SD
J1 GPIO 17 - J2 6
J1 GPIO 17 - J2 6
TP_MOSI
J1 GPIO 17 - J2 6
R7 P2 - U4 CLOCK
J1 GPIO 17 - J2 6
J1 GPIO 9 (SPI0 MISO) - J2 2
MK1
C15
Capacitance
Capacitance
R6 P2 - U4 CLOCK
C13
Capacitance
Capacitance
J1 GPIO 8 (SPI Chip Select 0) - J2 4
J1 GPIO3 (I2C1 SCL) - U2 SCLK/SCL
J1 GPIO 17 - J2 6
U4
J1 GPIO 17 - J2 6
J1 GPIO 17 - J2 6
U1 VOUT - J1 5V PWR
J1 3v3 - C4 P1
C11
Capacitance
Capacitance
J1 GPIO 19 (PCM Frame Sync) - U4 WS
J1 GPIO 11 (SPI0 SCLK) - J2 3
J1 GPIO2 (I2C1 SDA) - U2 MISO/SDA
TP_MISO
J1 GPIO 17 - J2 6
C18
Capacitance
Capacitance
R6 P2 - U4 CLOCK
J1 3v3 - C4 P1
J1 GPIO 17 - J2 6
U1 VOUT - J1 5V PWR
J1 GPIO 17 - J2 6
J1 GPIO 17 - J2 6
J1 GPIO 11 (SPI0 SCLK) - J2 3
J1 GPIO 11 (SPI0 SCLK) - J2 8
J1 GPIO 18 (PCM Clock) - U4 SCK
C19
Capacitance
Capacitance
J1 GPIO 17 - J2 6
J1 3v3 - C4 P1
C17
Capacitance
Capacitance
TP_SCK
R6 P2 - U4 CLOCK
J1 GPIO 20 (PCM Data-In) - U4 SD
C17
Capacitance
Capacitance
C8
Capacitance
100nF
J1 GPIO 18 (PCM Clock) - U4 SCK
C14
Capacitance
Capacitance
C21
Capacitance
Capacitance
J1 GPIO2 (I2C1 SDA) - U2 MISO/SDA
J1 GPIO 11 (SPI0 SCLK) - J2 3
J1 GPIO 10 (SPI0 MOSI) - J2 1
R7 P2 - U4 CLOCK
C9
Capacitance
100nF
J1 GPIO 17 - J2 6
J1 GPIO 17 - J2 6
J1 GPIO 20 (PCM Data-In) - U4 SD
U1 VOUT - J1 5V PWR
C12
Capacitance
Capacitance
J1 GPIO 17 - J2 6
J1 GPIO 20 (PCM Data-In) - U4 SD
C10
Capacitance
Capacitance
MK2
C19
Capacitance
Capacitance
GND
U3
Hole4
Hole3
Hole2
Hole1
U1
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    A common return path for electric current. Commonly known as ground.
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  • Generic Resistor
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    A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
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  • Generic Capacitor
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  • Generic Inductor
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    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
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    RMCF0805JT47K0
    47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
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  • 875105359001
    875105359001
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  • CTL1206FYW1T
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Particular Blue KITT thumbnail
Integration of 2.9" Raw E-Paper Display with Raspberry Pi using FPC and Dedicated PMIC Driver

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