Error Reporting And Status; Errb Configuration; Latching Status Bits And Clearing Errors; Bandwidth Efficiency Optimization - Analog Devices MAX96752 User Manual

Error Reporting and Status

ERRB Configuration

The ERRB pin can be used to notify the system of undervoltage and overvoltage conditions. Each of the available
monitor functions can be separately routed to the ERRB pin as described in the above sections detailing the various
voltage monitors. The user-configurable register fields are listed below. These register fields, when set to 1, enable
the reporting of the associated undervoltage/overvoltage condition to the ERRB pins (i.e., the error condition will
assert ERRB low. Reference the GMSL2 Error Reporting (ERRB Pin) section for additional information.
Table 23.
ERRB Pin Reporting Enable for Undervoltage and Overvoltage Conditions for MAX96752
Bitfield
VDDBAD_INT_OEN
VDDCMP_INT_OEN
VDD_OV_OEN

Latching Status Bits and Clearing Errors

The status flags that drive ERRB are latching. They are set in the event of an error condition; the error indication is
persistent following recovery of the error. The flags and other associated bits are cleared automatically when read.
Note that some of the flags are driven by status bits that are also latched and must be cleared prior to clearing the
flag. Flags associated with overvoltage conditions only become active when the video path is active. If the video
path is not active, the flag bits will not be set in the event of an overvoltage.

Bandwidth Efficiency Optimization

Overview

Before implementing a new design, it is critical to do bandwidth (BW) calculations to verify that the right devices
and settings are used. If this is not done, it is possible that data will be lost or corrupted. Although the MAX96752
family can transmit at 6Gbps/187.5Mbps depending on part number and configuration, the maximum allowable
video payload is smaller due to the overhead of the GMSL link. The video payload should not exceed the values
shown in this table.
Table 24.
GMSL2 Maximum Video Payloads
GMSL2 Mode
3Gbps Mode (NRZ)
6Gbps Mode (NRZ)

Calculating Bandwidth

The basic video payload can be calculated using the equations below.
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Maximum Video Payload
2.6Gbps (2600Mbps)
5.2Gbps (5200Mbps)
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���������� ����������
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Description
Asserts ERRB low when
(VDD_sw UV)
Asserts ERRB low when
(VDD18, VDDIO, VTERM, and/or VDD_sw UV)
Asserts ERRB low when
(VDD_sw OV)
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VDDBAD_INT_FLAG = 1
VDDCMP_INT_FLAG = 1
VDD_OV_OEN = 1
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