Power Supplies; Power Manager States - Analog Devices MAX96752 User Manual

Power Supplies

GMSL devices share a common set of power supply voltages that power universal functions such as the digital core,
GMSL link circuitry, and GPIO. These power supplies are summarized below.
For MAX96752:
• V : Internal 1.0V Digital Regulator Supply. If using regulator, connect a input voltage between 1.71V and 1.89V.
REG
If not used, make no connection.
• V
: The input voltage to the V
DDD
• V : 1.0V Digital Regulator Supply. If using regulator, connect an input voltage between 1.71V and 1.89V. If not
REGA
used, make no connection.
• V
: The input voltage to the V
DDA
• V : 1.8 V or 3.3 V I/O power rail for I/O.
DDIO
• V : 1.8 V or 3.3 V I/O power rail for I/O.
DD18
External power is supplied directly to V

Power Manager States

At device power-up, the power manager block automatically controls the power sequencing process. Power
supplies can ramp in any order and do not need to be externally sequenced. When power is applied, the power
manager senses the presence of each domain. When the voltage threshold is reached for all supplies, the power
manager signals to the other device domains that power is stable and begins to transition into Run mode.
The power manager state machine has four power states: boot, run, saved, and reset (power down/sleep). The
power manager circuitry is in the "always-on" V
monitored during the full sequence of power states. This architecture allows for a seamless resume from the Sleep
to Run mode and draws minimal current. Retention memories are also powered by the V
configuration and register settings can be saved and restored.
Figure 28 shows the state diagram for the power manager.
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rail can be between 0.95V and 1.05V.
DDD
rail can be between 0.95V and 1.05V.
DDA
, V V , V
REG DDD, REGA DDA
domain so that all power domains may be managed and
DD18
, V , and V
DDIO DD18
domain so that device
DD18
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