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It is using direct 3.3V serial for embedding, the mini PCIe is just used for the ubiquitous, effective, cheap, and low profile connector. It doesn't actually h
by LeifCarrotson 4y ago
It is using direct 3.3V serial for embedding, the mini PCIe is just used for the ubiquitous, effective, cheap, and low profile connector.
It doesn't actually have any PCIe lanes, it has power, ground, the aforementioned 3.3V serial, a transmit/receive indicator, and a single (!) GPIO.
I'm not 100% sure, but I suspect if you tried to plug it into an mSATA slot either it or the laptop would be damaged.
- LeifCarrotson 4y agoEdit: Here's the pinout of the Swarm modem: https://i.imgur.com/VQvDrEa.png https://i.imgur.com/VQvDrEa.png Here's the pinout of a mini PCIe card: https://i.imgur.com/YJIyJ86.png https://i.imgur.com/YJIyJ86.png And here's the pinout of mini PCIe/mSATA (numbered from bottom to top, which makes it slightly more challenging to compare): https://i.imgur.com/7yL3FW4.png https://i.imgur.com/7yL3FW4.png The ground connections all line up, and the 3.0 to 5.0V input, 1000 mA rated VDD on the Swarm is connected to 3V3. The Swarm UART is connected to REFCLK+ and REFCLK- on the PCIe bus, and the GPIO drives LED_WWAN. Should be no problem! I suppose that it would be really cool if they provided an I2C/2-wire/SMB communication interface on pins 30 and 32 so hypothetically you could connect it to a computer.