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please explain what J1 does.
siyun

siyun

@copilot please explain what J1 does.
1y

copilot

Explanation of J1
The component $J1$ in your schematic is a Molex connector, specifically 5051101692. Let's break down its role in your project:
Pin Summary:
$J1$ has 16 pins with simple numerical names (1-16), along with two additional pins named P1 and P2. Here is the mapping of J1's connections in your project:
  • Pins 1 and 2: Connected to the 5V net ($RPi1$ power pin 5V; $Net (+5V - P1)$).
  • Pins 3, 6, 9 and 12 are: Ground pins ($GND$).
  • Pin 4: Connected to the PCIE_CLK_P net ($PCIE_CLK_P$).
  • Pin 5: Connected to the PCIE_CLK_N net ($PCIE_CLK_N$).
  • Pin 7: Connected to the PCIE_RX_P net ($PCIE_RX_P$).
  • Pin 8: Connected to the PCIE_RX_N net ($PCIE_RX_N$).
  • Pin 10: Connected to the PCIE_TX_P net ($PCIE_TX_P$).
  • Pin 11: Connected to the PCIE_TX_N net ($PCIE_TX_N$).
  • Pin 13: Connected to the PCIE_PWR_EN net ($PCIE_PWR_EN$).
  • Pin 14: Connected to the PCIE_DET_WAKE net ($PCIE_DET_WAKE$).
  • Pin 15: Connected to the PCIE_CLKREQ_N net ($PCIE_CLKREQ_N$).
  • Pin 16: Connected to the PCIE_RST_B net ($PCIE_RST_B$).
Functionality:
The $J1$ connector is responsible for interfacing with PCIe-related signals to the Raspberry Pi 5. The signals include:
  • Power Supply:
    • 5V (Pins 1 and 2)
    • Ground (Pins 3, 6, 9, 12)
  • PCIe Clock Signals:
    • PCIE_CLK_P (Pin 4)
    • PCIE_CLK_N (Pin 5)
  • PCIe Receive Data:
    • PCIE_RX_P (Pin 7)
    • PCIE_RX_N (Pin 8)
  • PCIe Transmit Data:
    • PCIE_TX_P (Pin 10)
    • PCIE_TX_N (Pin 11)
  • PCIe Control Signals (Enables power, wake-up detection, clock request, reset):
    • PCIE_PWR_EN (Pin 13)
    • PCIE_DET_WAKE (Pin 14)
    • PCIE_CLKREQ_N (Pin 15)
    • PCIE_RST_B (Pin 16)
This configuration implies that $J1$ serves as a key component for integrating a PCIe interface with your Raspberry Pi 5 Hat, allowing it to communicate with PCIe devices effectively.
1y
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Raspberry Pi 5 Hat with PCIe Template

Raspberry Pi 5 Hat with PCIe Template
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Last updated by vasy_skral
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vasy_skral

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