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// PCB Board Connectors

M.2 A-Key (WiFi/BT)

M.2 A-Key is a 2230 or 2242 form factor slot for Wi-Fi and Bluetooth combo modules. The A-key notch is at pin 8-9 position. Provides PCIe x2 and USB 2.0 interfaces for wireless connectivity cards.

// Specifications
Standard
M.2 specification A-key
Key Position
A-key notch at pins 8-9
Interfaces
PCIe x2 and USB 2.0
Form Factor
2230 or 2242 typical
Use Case
Wi-Fi Bluetooth combo modules
Example
Intel AX200 AX210 Wi-Fi 6E cards
// Pin Reference Table
Pin Name Function Type
1 GND Ground GND
2 3.3V 3.3V power PWR
3 GND Ground GND
10 PERST# PCIe reset I/O
11 PCIe Lane 0 TX+ PCIe TX positive BUS
12 PCIe Lane 0 TX- PCIe TX negative BUS
13 PCIe Lane 0 RX+ PCIe RX positive BUS
14 PCIe Lane 0 RX- PCIe RX negative BUS
67 USB D+ USB 2.0 data positive BUS
68 USB D- USB 2.0 data negative BUS