JAJSS39A November 2023 – March 2024 DAC39RF10EF , DAC39RFS10EF
PRODUCTION DATA
In the transmitter (logic device) the transport layer takes samples from the application layer and maps the samples into octets inside of frames. The frames are then mapped onto the available SerDes lanes. In the receiver (DAC) the transport layer performs the inverse operation to extract samples from the serialized data. The mapping of octets into frames and frames onto lanes is defined by the transport layer settings such as L, M, F, S, N and N'. An octet is 8 bits (before 8b/10b or 64b/66b encoding), a frame consists of F octets and the frames are mapped onto L lanes. Samples are N bits, but sent as N' bits across the link. The samples come from M converters and there are S samples per converter per frame cycle.
There are a number of predefined transport layer modes in the device that are defined in JESD204C Interface Modes. The various configuration parameters for JESD204C block are defined in JESD204C Interface Parameter Definitions.
The link layer further maps the frames into multiframes.