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• GNSS debug pins on Q model (109, 110)

• AUX_RTS and AUX_CTS removed on Q model (now RESERVED pins)

• USIM2 no longer has a DET pin on Q model (no card detect)

• Q model uses previously RESERVED pins for CAM SPI functionality (95, 78, 97, 98, 115, 93, 94)

• Q model has backup power pins for the GNSS antenna (117, 118, 112)

• Pins for SLEEP and WAKEUP have been renamed (among others)

• MIC-related pins have been removed (now RESERVED pins: 119, 121, 122, 126, 120)

Final Selection

EG915Q-NA selected. See chat in #rpi-interface-rev-c for more.

• Model is available on DigiKey Canada

• 2 SIM connections, USB 2.0

• Has bands 12 and 13, the low frequency bands best for long-range communications

• Missing 7 and 71 but these high-speed bands matter less for the purpose of the device

• Exact same footprint as EG915N-EA (routing won’t have to be redone)

Layout

Collection of hardware design guideline excerpts from various component datasheets.

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