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©2019 NEC Display Solutions, Ltd. Page 72 of 74
What is the MAC address of the Compute Module?
The MAC address is assigned by the Compute Module itself and is derived from the CPU serial number.
The first 3 octets (B8:27:EB) are fixed and assigned to Raspberry Pi Foundation. The remaining 3 octets
are the last 6 hex digits of the CPU serial number. For example, if the CPU serial number is
0000000096bf4e08 the MAC address will be B8:27:EB:BF:4E:08. The CPU serial number can be
obtained by using:
cat /proc/cpuinfo
How long does it take to flash the Compute Module?
It depends on the size of the image being flashed. USB read and write speeds are typically 5MB/s. So a
4GB image will take approximately 13 minutes to write. That time will double if verification is used. Using
the Etcher flashing software can speed up the process significantly.
How can I find out the LAN IP or MAC address of the host display from the Compute Module?
The Python SDK includes the functions command_ip_address_read() and
command_lan_mac_address_read() that will return the IP and MAC address of the display.
How can the Compute Module be automatically shut down when the display is turned off?
A new Expert mode control has been added to the OSD that will enable performing a shutdown of the
Compute Module when the display is turned off via a command, power button, OSD menu, or IR remote
control. See CM Auto Shutdown in section 8.18
Are the NEC displays compatible with the new Compute Module CM3+?
The 8, 16, and 32 GB eMMC versions are supported.
Are the NEC displays compatible with the Compute Module Lite?
No. The CM Lite requires SD card support.
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