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please help me to make an m.2 to PCIE adapter

thegur90

@copilot please help me to make an m.2 to PCIE adapter

copilot

Sure thing! Let's start by outlining the necessary connections. An M.2 to PCIe adapter will primarily require matching the pinout of the M.2 edge connector to the corresponding pins on the PCIe connector. Here are the major components and their connections:

Components

M.2 Connector (e.g., M-key for NVMe SSDs)
PCIe Connector (e.g., x4, x8, or x16 depending on the application)
Supporting components like capacitors for power stabilization and resistors for pull-ups.

Basic Connections:

Power connections: We need to provide power from PCIe to M.2.
- Connect +3.3V from PCIe to M.2
- Connect +12V from PCIe (if necessary, depending on M.2 card)
PCIe Lane connections: Match PCIe lanes from the M.2 connector to the PCIe lanes.

Detailed Pinout M.2 Key M (NVMe)

Pins 18-23: PCIe TX/RX lanes
- Connect M.2:18 ( $PCIe\ TX1^-$ ) to PCIe:36 ( $TX^-$ )
- Connect M.2:20 ( $PCIe\ TX1^+$ ) to PCIe:34 ( $TX^+$ )
- Connect M.2:22 (Ground) to PCIe:38 (Ground)
- Connect M.2:23 ( $PCIe\ RX1^-$ ) to PCIe:40 ( $RX^-$ )
- Connect M.2:21 ( $PCIe\ RX1^+$ ) to PCIe:42 ( $RX^+$ )
Power pins:
- Connect M.2:2, 4, 69 (3.3V) to PCIe:2, 4, 6 (3.3V)
- Connect M.2:13, 25, 39, 58, 75 (Ground) to PCIe:3, 5, 7, 15, 17, 19 (Ground)

Additional Connections

REFCLK signals:
- Connect M.2:12 ( $REFCLK^+$ ) to PCIe:8 ( $REFCLK^+$ )
- Connect M.2:14 ( $REFCLK^-$ ) to PCIe:10 ( $REFCLK^-$ )
PERST# (Reset):
- Connect M.2: 14 to PCIe: 14

Example Schematic

I'll provide a concise list of connections for you to input:

Power Connections:
- Connect PCIe:2 to M.2:2, M.2:4, M.2:69
- Connect PCIe:3 to M.2:13, M.2:25, M.2:39, M.2:58, M.2:75
PCIe Lane Connections:
- Connect PCIe:36 to M.2:18
- Connect PCIe:34 to M.2:20
- Connect PCIe:38 to M.2:22
- Connect PCIe:40 to M.2:23
- Connect PCIe:42 to M.2:21
REFCLK Signals:
- Connect PCIe:8 to M.2:12
- Connect PCIe:10 to M.2:14
PERST# (Reset):
- Connect PCIe:14 to M.2:14

This is a basic blueprint. You may need to add more components or connections based on additional requirements and your exact M.2 and PCIe specifications.

Would you like to proceed with drafting the schematic in Flux? If you have part numbers or more specific details, please provide those so I can customize the design further.

Reviews

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