Chronos Module; Mcu - Embedded Planet epConnected Asset Product User Manual

Embedded Planet, Inc.
7.

Chronos Module

Chronos is Embedded Planet's custom 4G LTE CAT M1 embedded cellular modem. The epConnected Asset
device leverages the abilities of Chronos for its cellular and GNSS connectivity. In the default configuration of the
epConnected Asset board Chronos is already included as a board-mounted component. Details for Chronos itself can
be found here: https://www.embeddedplanet.com/product-documentation/#chronos
Chronos provides two U.FL connectors; one for a cellular antenna and one for a GNSS antenna. Both of these
connectors are routed to the epConnected Asset board through U.FL-to-U.FL cables. Section 15 (Antennae) goes into
further detail on these connections.
Chronos
embedded modem
8.

MCU

The
MCU on the epConnected Asset is Nordic's nRF52840 (U1). Details of this MCU can be found here:
https://www.nordicsemi.com/Products/Low-power-short-range-wireless/nRF52840
The nRF52840 is used to control power to the on-board sensors and to Chronos using GPIO. The sensors are
connected to the nRF52840 on the I
The ultra-low power timer's DONE pin is controlled by GPIO, allowing the nRF52840 to stay on for an arbitrary
amount of time once the timer has applied power to the nRF52840. The external flash memory is connected to the
nRF52840's QSPI peripheral. The battery monitor is connected to an ADC channel on the nRF52840. For the MCU
pinout, refer the section of this report titled, "MCU Pinout" under "Pinouts".
U1: nRF52840
MCU
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epConnected Asset | Product User Manual
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C bus. The Chronos module is connected to the nRF52840 via UART and GPIO.
Document Version: 1.0.0 | 26 Jan 22