Debug Procedure; I 2 C Control Channel; Overview; Port Access And Routing - Analog Devices MAX96752 User Manual

Debug Procedure

If the oLDI deserializer is not performing as expected, perform the following sequence:
Ensure that minimum and maximum frequency limits have not been exceeded.
Verify that a valid video stream is detected by the deserializer (VID_PKT_DET).
Verify that a valid video stream is received and recovered for the selected channel ID and that it is properly
recovered by the LVDS (VID_LOCK).
Ensure that the oLDI split control signal is properly mapped to the falling edge of the DE signal (OLDI_SPL_MODE
and OLDI_SPL_POL).
Ensure that oLDI ports A and B are properly mapped (OLDI_SWAP_AB).
Set DUAL_OLDI_AUTO_RST_ALIGN = 1 if pixels are being swapped between oLDI Tx ports in Dual oLDI mode
applications.
Check that the 4 LVDS lane is not disabled for 24-bit video (OLDI_4TH_LANE).
th
I C Control Channel
2

Overview

The primary I C control channel is used to provide access to both serializer and deserializer registers across the
2
GMSL link. This provides flexibility where the registers for both serializer and deserializer are accessible from
whichever side the main microcontroller resides. For camera applications, the main microcontroller typically
resides on the deserializer side, while for display applications, the main microcontroller typically resides on the
serializer side.
The pass-through I C channels are used to send I
2
access the remote-side devices connected through the corresponding pass-through ports but cannot access the
serializer or deserializer registers.
When making changes to any of the serializer or deserializer I
channel, a 10µs delay from the write acknowledgement (ACK) to the next transaction is required.

Port Access and Routing

The MFPs shown in the table below are used for the I2C primary and pass-through channels.
•
MAX96752 Pins for I
Pin Default Function
40 GPIO03
42 GPIO05
27 SDIR
29 WSIR
8 SDA_RX
9 SCL_TX
1 I2CSEL
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C data across the GMSL link. The pass-through channels can
2
2
C
I C Function
2
SDA1
SCL1
SDA2
SCL2
N/A
N/A
I2CSEL
C configuration, such as enabling or disabling an I
2
Notes
Enable I 2 C pass-through via register
Enable I C pass-through via register
2
Enable I C pass-through via register
2
Enable I C pass-through via register
2
I C or UART function selected via CFG0 pin
2
I C or UART function selected via CFG0 pin
2
Selects I C or UART on power-up. Latch high to
2
select I C.
2
C
2
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