What is JESD204B standard?

JESD204B Standard at a Glance. • A standardized serial interface between data converters (ADCs and. DACs) and logic devices (FPGAs or ASICs) • Serial data rates up to 12.5 Gbps. • Mechanism to achieve deterministic latency across the serial link.

How does JESD204B work?

JESD204B uses a common device clock going to all the converters which in turn is used to generate internal clocks in each device. internal clocks across different TX/RX devices. Depending upon a subclass, JESD204B uses SYSREF or SYNC as timing signal for this purpose.

What is JESD protocol?

It is the interface between ADCs/DACs and FPGAs. It can also be used with ASICs. The figure-1 below depicts JESD interface used between converters and FPGA/ASIC. The standard defines multi-gigabit serial data link between converters and a receiver (e.g. FPGA or ASIC).

What is deterministic latency?

Deterministic latency across the JESD204B link is defined by the time it takes serial data to propagate from the parallel framed data input at the transmitter (ADC or source FPGA) to the parallel deframed data output at the receiver (digital-to-analog converter, or DAC, or receiver FPGA).

What is JESD204C?

JESD204C is a standard of the Joint Electron Devices Engineering Council (JEDEC). It’s a high-speed interface designed to interconnect fast analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) to high-speed processors, FPGAs, and ASICs.

What is SerDes FPGA?

A SerDes is an integrated circuit or device used in high-speed communications that converts between serial data and parallel interfaces, in either direction.

Why is deterministic latency important?

Deterministic link latency is achieved by using the elastic buffer with an appropriate data release point. By definition, achieving deterministic link latency for a system means that the system will be able to have a fixed link latency from startup to system startup.

What is true of deterministic processes?

If something is deterministic, you have all of the data necessary to predict (determine) the outcome with 100% certainty. The process of calculating the output (in this example, inputting the Celsius and adding 273.15) is called a deterministic process or procedure.

What does SerDes stand for?

From Wikipedia, the free encyclopedia. A Serializer/Deserializer (SerDes pronounced sir-deez or sir-dez) is a pair of functional blocks commonly used in high speed communications to compensate for limited input/output. These blocks convert data between serial data and parallel interfaces in each direction.

Why do we need SerDes?

The primary utilization of SerDes is to facilitate data transmission over a single-line or a differential pair to mitigate the number of input pins, output pins, and interconnects. The data that we receive is serial data via our physical channels, and the receiver converts this data back into parallel data.

What is difference between stochastic and deterministic?

In deterministic models, the output of the model is fully determined by the parameter values and the initial conditions initial conditions. Stochastic models possess some inherent randomness. The same set of parameter values and initial conditions will lead to an ensemble of different outputs.

Who is the father of Indeterminism?

Indeterminism has been promoted by the French biologist Jacques Monod’s essay “Chance and Necessity”.

What are the grades in the jesd204b specification?

The JESD204B specification supports three possible speed grades. Speed Grade 1 supports up to 3.125 Gbps and is based on the OIF-SxI5-0.10 specification. Speed Grade 2 supports up to 6.375 Gbps and is based on the CEI-6G-SR specification. The third speed grade supports up to 12.5 Gbps and is based on the CEI-11G-SR specification.

What is the data rate of the jesd204b FPGA?

The JESD204B IP uses the Avalon-ST source and sink interfaces, with unidirectional flow of data, to transmit and receive data on the FPGA fabric interface. Data rate of up to 19.2 Gbps (characterization up to 12.5 G)

What does the application layer do in jesd204b?

The application layer allows for configuration and data mapping of the JESD204B link. The transport layer maps conversion samples to and from framed nonscrambled octets. The scrambling layers can optionally take those octets and scramble or descramble them in order to reduce EMI effects by spreading the spectral peaks.

How many lanes does a jesd204b IP generate?

The IP is a unidirectional protocol where interfacing to ADC utilizes the transceiver RX path and interfacing to DAC utilizes the transceiver TX path. The JESD204B IP generates a single link with a single lane and up to a maximum of 8 lanes.