8. POWER MODES
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8 Power modes
Figure 10: Power modes
The Vision 312 device has four power modes:
• In Disconnected Mode, Terminal 30 is disconnected from the power supply. Only the real-time clock
is powered (until the internal energy buffer is drained).
• In Power-off Mode, Terminal 30 is connected to the power supply, but the RAM content is lost. Only
the real-time clock is running and gets charged, the rest of the device is off.
• In Suspend Mode, Terminal 30 is connected to the power supply and the RAM content is preserved,
but the device is mostly inactive.
• In Power-on Mode, Terminal 30 is connected to the power supply and the device is fully operational.
The mode transitions can be triggered as follows:
Power mode transition Note Trigger
Disconnected → Power-off Terminal 30 connected to power supply
Disconnected → Power-on Connected to power supply:
• Terminal 30 and Terminal 15
• Terminal 30 and Wake-up input
• Terminal 30, Terminal 15, and Wake-up input
© TTControl GmbH 2020. All rights reserved.
Confidential and Proprietary Information
33
Document Number:
D-156-G-02-001
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