How to flash the eMMC
In order to flash the Compute Module's eMMC memory, an additional board, like the
Compute Module IO Board V3
, shall be used. Use the latest RPIBOOT utility from
Raspberry Pi and refer to its documentation for installation and usage details.
Alternatively, if using the Compute Module 4S (or a Compute Module 3/3+ with
USB host
boot mode
previously enabled ) you can boot the unit from USB , access via SSH, and
flash the eMMC which will be available as a local mass storage device.
Replacing the RTC backup battery
Strato Pi CM has a hardware real time clock with a dedicated long-life non-rechargeable
back-up battery.
Strato Pi CM is shipped with a
Lithium / Manganese Dioxide (Li/MnO2) battery
installed.
The battery is only used to power the RTC chip when the main power is not available.
Depending on operating conditions it should last up to two years if the Strato Pi CM is not
powered, more if it regularly receives external power.
The RTC backup battery holder is on the vertical circuit board, opposite the Compute
Module slot. In the Strato Pi CM, the battery is not accessible from the outside. You should
first remove the case body to gain access to the Strato Pi CM circuit boards. Follow the
procedure described at the beginning of this chapter to open and replace the case.
Improper handling of lithium batteries can result in an explosion of the batteries and/or
release of harmful substances.
Worn-out or defective batteries can compromise the function of this product.
KEEP OUT OF REACH OF CHILDREN
. Swallowing may lead to serious injury or death in
as little as 2 hours due to chemical burns and potential perforation of the esophagus.
Immediately see doctor.
Replace the RTC lithium battery before it is completely discharged. Replace the battery
every 5 years even if the battery is still working properly. The lithium battery must be
replaced only with an identical
CR1220
or
BR1220
battery.
WARNING
https://www.raspberrypi.com/documentation/computers/compute-module.html#flashing-the-
compute-module-emmc
https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#usb-host-boot-mode
https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#booting-from-usb-
mass-storage
BR1220 batteries (Lithium Poly-carbonmonofluoride) can also be used, for improved shelf and
service life.
12
Strato Pi CM User Guide
