Not All Registers Are Saved; Voltage Monitoring/Adc; Overview; Architecture - Analog Devices MAX96752 User Manual

device will reset to the state that had been configured prior to entering Sleep mode previously rather than
recovering in a clean power-up default state. The most severe implication of this is that the (SLEEP=1) state is saved
in the retention memory, so the device will recover from reset and immediately enter Sleep mode.
Due to the above-described behavior,

Not All Registers are Saved

Most key registers corresponding to common device configuration are saved in retention memory. However,
applications requiring extensive low-level configuration or infrequently used features may require writing to
registers that are not saved in retention after resume from sleep. In these cases, full recovery from Sleep mode to
the pre-sleep device state requires some repeated register configuration following resume from sleep. Registers
that are stored in retention memory are marked with "*" in the register map in the data sheet.

Voltage Monitoring/ADC

Overview

GMSL2 devices monitor various onboard supply voltages and provide alerts for over- or undervoltage conditions.
Dedicated status register flags are driven by internal comparators that measure each supply voltage relative to an
internal voltage reference. These registers are latching status flags. Supply voltages with latching status flags retain
alerts and can be used to capture temporary conditions and be read back later, at which time the previously
latched state is cleared. Many status flags have user-configurable parameters including custom voltage thresholds
and the option to report status registers to the ERRB pin, which will assert low when an errant condition is sensed.
Reference the GMSL2 Error Reporting (ERRB Pin) section for additional information.

Architecture

Most GMSL2 devices include a common set of power supplies that provide power to the digital core (V
circuitry (V ), and general GPIO pins (V
DD18
power supplies with some providing extended monitoring capabilities. Each GMSL2 product family has unique,
family-specific power supplies with dedicated functionality. Examples here include HDMI power (V
family-specific power supplies are not typically monitored.
The following table details the power supplies for which voltage monitoring is available.
Table 21.
Power Supply Monitoring Functions Available for MAX96752
Supply Name
V
DD
V
DD18
V
DDIO

Operation

V Monitoring Details
DD
Undervoltage (UV) and overvoltage (OV) monitoring of VDD_SW (the primary 1V core supply) is included on nearly
all GMSL2 devices (V OV monitoring is not available on HDMI and advanced HDMI serializers). VDD_sw is typically
DD
derived from VDD/VREG either via an internal LDO or series switches.
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RESET_ALL and sleep should never be used together.
). All devices include undervoltage monitoring on the common set of
DDIO
Description
Internal 1V digital core supply
GMSL 1.8V supply
1.8V to 3.3V I/O supply
DD33
Monitor Functions Available
Undervoltage, Overvoltage
Undervoltage
Undervoltage
Analog Devices | 43
), GMSL link
DD
). These