Part Number: AFE7444
I'm new to high speed data converters. The AFE7444 has LMFS specified in the data sheet. However, there are 5 numbers instead of 4. As such, I guess that the last one is for the "Hd" part. What does Hd mean?
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In reply to Yusuf%20Agoro:
thanks for the quick reply.
So do I understand correctly that the table found in the datasheet here:
on the first page, shows a column for TX LMFS and in the first data row shows 84111, that this corresponds to the configuration:
L = 8, M=4, F=1, S=1 and Hd=1?
And a second question: "transmitting a sample broken up into pieces over multiple lanes"
Using this as a reference:
Since within the JESD204B interface there seems to be a strict hierarchy such that
1 link contains L lanes1 lane contains M frames1 frame contains F octets1 octet contains S bits
how does it make sense to break up a sample over multiple lanes? Naively, I would think that this sounds like some sort of compression technique or coherent transmission. Is there any white paper or such, where I could read up on this? Or if it's simple enough, could you please clarify? Is there any description on the HD mode?
In reply to Imran Khan46:
Reference the following JESD format table for TX LMFS = 84111. Notice how the sample for channel I is 16 bits total ( i0[15:0] ). Yet in a single frame half of the 16 bit sample is in lane 1 ( i0[15:8] ) while the other half is packaged in lane 2 ( i0[7:0] ). Because of this Hd aka high density is set to 1.
Hopefully this answers your question.
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