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Assert CB_nPOR
On/Off soft reset
button pressed briefly
100765_0000_04_en
MCC reads the EEPROM and does preliminary configuration.
You can use the USB configuration port
to edit and update the configuration files
in the configuration microSD card.
On/Off soft reset button pressed?
MCC reads generic config.txt file from the configuration microSD card
Configuration microSD
card MB directory contains subdirectories that match
the HBI code in the board EEPROM?
MCC reads configuration files from configuration microSD card.
MCC configures the board clocks.
MCC configures the FPGAs and SCC registers.
MCC pre-loads the boot QSPI/DDR4/BRAM image.
CB_nRST and
CB_RUN
Resets CB_nPOR, CB_nRST and CB_RUN released, processor starts
Run boot SRAM image if
Hardware reset or On/Off soft reset button
Copyright © 2017–2020 Arm Limited or its affiliates. All rights
Apply power
Standby state
Yes
Yes
Yes
executing code
Run state
present
pressed?
Hardware reset button pressed or ON/OFF soft
reset button pressed for 2 seconds
Figure 3-2 MPS3 board powerup and configuration sequence
reserved.
Non-Confidential
3 Configuration
3.3 Powerup and configuration sequence
No
Record failure in
configuration microSD
card log file
No
No
3-59
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