![ARM V2M-Juno r2 Technical Reference Manual Download Page 65](http://html.mh-extra.com/html/arm/v2m-juno-r2/v2m-juno-r2_technical-reference-manual_2973223065.webp)
3.2
Configuration process and operating modes
The V2M-Juno r2 motherboard provides a powerup and configuration process, a powerdown process,
and two operating modes, operating-state and sleep-state.
This section contains the following subsections:
•
3.2.1 Transitions between operating modes
•
3.2.2 Powerup and configuration sequence
•
•
•
3.2.1
Transitions between operating modes
The power reset push buttons and configuration files control the sequence of events of the powerup and
configuration process and the transitions between the different states of the V2M-Juno r2 motherboard.
The V2M-Juno r2 motherboard has the following operating modes:
Standby-state
The V2M-Juno r2 motherboard and Juno r2 SoC are mostly powered down. The powerup and
configuration sequence takes them to the operating-state.
Operating-state
This is the full operating mode. Peripherals, clocks, and application code all operate. The
powerdown sequence takes the board to the standby-state and the sleep-state sequence takes it to
the sleep-state.
Sleep-state
This state powers down the Juno r2 SoC clusters and preserves operating data and the
application code start-point. Application code resumes when the Juno r2 SoC returns to the
operating-state.
Note
The system cannot return directly to the standby-state from the sleep-state. It must return to the
operating-state before the powerdown sequence can begin.
The following figure shows the configuration process and the transitions between the standby-state,
operating-state, and sleep-state of the V2M-Juno r2 motherboard.
3 Configuration
3.2 Configuration process and operating modes
ARM 100114_0200_03_en
Copyright © 2015–2017 ARM Limited or its affiliates. All rights reserved.
3-65
Non-Confidential