What You Should Know About Xilinx QPro Series Configuration PROMs

Xilinx devices have a long-standing history of implementation in computational applications. The company developed digital signal processing (DSP) and high-performance computing (HPC) in the 1990s. The XC4000 series developed by Xilinx became an effective solution to several applications. Also, the developments in some technologies triggered the need for higher computer density.

High-reliability applications in today’s world require the density in Xilinx reprogrammable FPGAs.  Xilinx developed specific compute-intensive elements over time. Also, the demand for Xilinx devices in handling computational applications increased. Therefore, this gave birth to the creation of Xilinx QPro Series Configuration PROMs. In this article, we will be discussing Xilinx QPro Series Configuration PROMs.

Xilinx QPro Series Configuration PROMS-What is it?

The Xilinx QPro Series Configuration PROMs offers an easy-to-use method to store large bitstreams. This family features devices that can store large Xilinx FPGA configuration bitstreams. The FPGA produces a configuration clock that controls the PROM. However, this happens when the FPGA is in a Master Serial mode. Data will appear on the ROM after the rising clock edge.

Therefore, the FPGA produces the right number of clock pulses to complete the configuration. Immediately it configures, the FPGA disables the PROM. The FPGA and PROM must be clocked when the FPGA is in a slave Serial mode. FPGA produces the configuration clock that controls the FPGA and PROM. This happens when it is in Master SelectMAP mode.

The QPro Series features a storage capacity of about 16Mb. Also, it can operate in a byte-wide or serial mode. You can use the CEO output to drive the input of the CE. This will help you link up multiple devices. The DATA outputs and clock inputs of all PROMs must interconnect. All devices can function with other members of the family.

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Pin Description of the Xilinx QPro Series Configuration PROMS

We will describe each of the pins used in Xilinx QPro in this section

RESET/ OE

This input puts the DATA outputs in high impedance when High. Also, it withholds the address counter reset. This input pin’s polarity is programmable as either OE/RESET or RESET/OE. The address counter is “0” when RESET becomes active. Therefore, this puts the DATA output in high impedance. The preferred option for the device is active Low RESET. This is because you can connect the device to a pullup resistor and the FPGAs INIT pin.

CEO

This refers to Chip Enable Output. The CEO is specifically connected to the CE input of the next PROM. When OE and CE inputs are active, the CEO is low. When you read PROM, the CEO will follow CE. However, this happens when OE is active. CEO remains High when blah remains inactive. This output remains high until you reset PROM. Also, you can program OE to be either active-Low or active-High.

Data

When OE or CE isn’t active, data output must be in a high-impedance condition. The D0 pin is I/O during programming. Also, you can program OE to be either active Low or active High.

CE

The CE pin can disable the internal address counter when it is High. Also, it puts the DATA output in high impedance. This pin forces the device into -ICC standby mode.

CLK

If OE and CE become active, every rising edge on CLK input increases the internal address counter.

Vpp

This pin doesn’t permit overshoot beyond the specified maximum voltage. Also, the programming voltage pin must connect to Vcc. This will enable normal read operation. However, failure to enable this connection can result in temperature-dependent operation. Also, it can cause critical problems in-circuit debugging. Therefore, avoid leaving the Vpp floating.

BUSY

You must program the BUSY bit if this pin is floating. This will enable you to internally tie the BUSY pin to a pin-down resistor. Output data will be on hold when the BUSY pin is High. However, data output will resume when the BUSY pin is low.

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FPGA Master Serial Mode

A configuration program establishes the logic and I/O functions of the CLB. This program loads on command or upon power-up. This depends on the condition of the three FPGA mode pins. The FPGA loads the configuration program automatically from external memory. The Xilinx QPro is specifically designed to be compatible with Master Serial mode.

An FPGA enters this mode after reconfiguration or power-up. However, this happens when three FPGA mode-select pins stay Low. Therefore, data reads from the PROM on a single data line. The rising edge of the CCLK provides synchronization.

The Master Serial mode offers an easy configuration interface. An FPGA configuration requires only two control lines and a serial data line. It reads DATA from the PROM sequentially and accesses through the internal address. If the dual-function FPGA Din pin is specifically used for configuration, you must hold it at a specific level. Xilinx FPGAs achieve this using an on-chip default pull-up resistor.

How to Control PROMs

  • You need to connect the FPGA device with the PROM. Therefore, these guidelines will help you achieve it.
  • The DATA output drives the Din input of the FPGA device
  • Also, the PROM’s CEO output drives the CE of the next PROM
  • The Master FPGA CCLK output helps to control the CLK input of the PROM
  • The INIT output of the FPGA device can efficiently drive the RESET/OE input of all PROMS. This connection ensures that it resets the PROM address counter before any reconfiguration. Also, it must reset the PROM address counter even if a Vcc glitch initiated the reconfiguration.
  • Furthermore, the DONE or LDC pins can drive the PROM CE input. The use of LDC prevents possible connection on the Din pin.
  • The lead FPGA device features the DONE output. Therefore, this output drives the lead’s CE input if DONE isn’t grounded permanently. If not, LDC can drive CE. However, CE must be High during user operation. Also, you can make CE Low permanently. However, this makes the DATA output remain active. Therefore, it results in an unnecessary current supply of 10mA maximum.

How to Program the FPGA with Counters Unchanged after Completion

Xilinx QPro Series Configuration PROM

You can store multiple FPGA configurations for an FPGA in a PROM. However, you need to tie the OE pin low. After power-up, the internal address counters need to reset. Also, the configuration must start with the first program saved in memory. The address counters remain unchanged after completing the configuration. This is because the OE pin is Low.

Therefore, the DONE line must be Low and configuration must start at the address counters’ last value. This is how to reprogram FPGA with another type of program. However, this method can fail if you apply RESET during the configuration of the FPGA. Here, the FPGA terminates the configuration and starts a new configuration again. However, the PROM won’t reset its address counter. This is because its OE input isn’t High.

Therefore, the new configuration interprets the remaining data in the PROM as a preamble. The FPGA issues the number of CCLK pulses and DONE goes High. But, the FPGA configuration will go wrong. This method isn’t ideal when there is a chance of external reset during the process of configuration.

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How to Cascade Configuration PROMs

Cascaded PROMs offer additional memory for several FPGAs configured as a daisy chain. After reading the last bit from the PROM, there is a clock signal. This signal makes its CEO output Low. Also, it disables the DATA line. There is a second PROM that recognizes the CE input’s low level. Also, this PROM allows DATA output.

You need to reset the address counters of the PROMs cascaded. This is necessary after completing the configuration. The DONE line must go Low to enable the reprogramming of FPGA. Also, the configuration must start where the address counters halt. Therefore, avoid any contention between the configured I/O of Din and the DATA.

When CE is High, the PROM will enter a low-power standby mode.  Therefore, the output is in high impedance irrespective of the condition OE input.

Applications of Xilinx QPro Series Configuration PROMs

Artificial Intelligence

Artificial intelligence used AI/ML and DSP. With new neural techniques and models, AI is rapidly evolving. Xilinx QPRO Series Configuration PROMs play a crucial role in artificial intelligence. Artificial intelligence combines robust datasets and computer science to solve problems. Therefore, Xilinx QPro Series Configuration PROMs comprises features that aid AI’s efficiency.

Cloud computing

The Xilinx QPro Series Configuration PROMs is widely used in this application. Cloud computing functions by allowing client devices to have access to cloud applications. Also, this application depends heavily on automation technologies and virtualization. Therefore, this explains the roles of the Xilinx QPro Series in it.

Wireless Technology

Another application that relies on the QPro Series Configuration PROMs is wireless technology. Xilinx QPro has great features that enable communication between entities over distances. Therefore, it offers complete solutions to wireless networking. Also, Wireless technology doesn’t require the use of cables or wires. Hence, the QPro Series Configuration offers an efficient solution in this application.

Medical Equipment

High-performance medical equipment feature Xilinx QPro Series Configuration PROMs. Also, this Xilinx device can store configuration bitstreams of Xilinx devices. With these devices, more secure and safer medical equipment can be designed. The QPro Series combines high-performance software programmability with other features. Also, this helps to manage complex functions in medical devices.

Industrial Control

Xilinx QPro Series Configuration PROMs is widely used in programmable logic controllers. Also, other industrial control systems feature this configuration.  Also, Xilinx QPro is available in Control Loop, Intelligent Electronic Device, and more. Industrial control includes networks, controls, and systems to operate industrial processes.

Internet of Things (IoT)

Xilinx QPro Series Configuration PROMs is crucial in the development of IoT. Billions of physical devices are connected to the internet. Also, these devices collect and transmit data. However, this is possible through the development of Xilinx devices. Therefore, it is now easy to connect various objects and add sensors to them.

5G Technology

This is another application that relies on the Xilinx QPro Series Configuration. The fifth-generation (5G) technologies are a big achievement in mobile broadband. These technologies enable enhanced performance in the Internet of Things. Xilinx QPro offers features that meet the increasing demands of data-intensive applications. For instance, the Xilinx QPro can store multiple or longer bitstreams.

Consumer Electronics

A good number of consumer electronics depend on Xilinx QPro Series Configuration PROMs. The computer system and mobile phones feature this configuration. This is because of the features this configuration offers.

Aerospace and Defense

The aerospace and defense industries also benefit from the Xilinx QPro Series configuration PROMs. This configuration provides features that support some systems in aerospace and defense. The Xilinx QPro family provides solutions to critical issues in the aerospace and defense industry.

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QPro Series Configuration PROMs Devices

XQR1701LSO20V XQR1701LSO20M XQR1701LSO20N

XQR1701LCC44V XQR1701LCC44MES XQR1701L-CC44V

XQR1701L-CC44M XQ1701LSO20V XQR1701LCC44M

XQ1701LSO20N XQ1701LSO20M XQ1701L-SO20N

XQ1701L-CC44M XQ1701L-CC44B XQ1701LCC44M

The devices above belong to the Xilinx QPro Series Configuration PROMs. The features of each of these devices are further discussed.

Features of XQR1701LCC44V

The XQR1701LCC44V belongs to the Xilinx QPro Series Configuration PROMs family. It has got great features which make it efficient in some applications.

  • It has one Event Bit Upset immune
  • Provides supports for XQ4000XL/Virtex fast configuration mode
  • Certified by QML
  • It is available in a 44-pin ceramic LCC (M grade) package
  • It supports the Xilinx Alliance
  • Also, it has a 20-pin SOIC package (XQ1701L)
  • It has Single Event Bit Upset immune
  • Comprises programmable reset polarity
  • It is compatible with various FPGA solutions
  • It has a simple interface
  • Ideal for storing multiple or longer bitstreams
  • It comprises Total Dose tolerance more than 50 Krad (Si)
  • Requires one user I/O pin

Features of XQR1701LSO20V

The XQR1701LSO20V device is radiation hardened. It is manufactured with the use of epitaxial substrates. However, it has got the following features:

  • Provides supports for XQ4000XL/Virtex fast configuration mode
  • Certified by QML
  • It has a 20-pin SOIC package (XQ1701L)
  • It has Single Event Bit Upset immune
  • Furthermore, it is available in a 44-pin ceramic LCC (M grade) package
  • It is compatible with various FPGA solutions
  • It has a simple interface
  • Ideal for storing multiple or longer bitstreams
  • Comprises programmable reset polarity
  • It comprises Total Dose tolerance of more than 50 Krad (Si)
  • Requires one user I/O pin
  • Certified by QML
  • It supports the Xilinx Alliance
  • Enables configuration one-time programmable read-only

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Features of XQR1701LSO20M

  • It has a 20-pin SOIC package (XQ1701L)
  • Ideal for storing multiple or longer bitstreams
  • Requires one user I/O pin
  • Provides supports for XQ4000XL/Virtex fast configuration mode
  • Certified by QML
  • Enables configuration one-time programmable read-only
  • It has Single Event Bit Upset immune
  • It is available in a 44-pin ceramic LCC (M grade) package
  • Also, it is compatible with various FPGA solutions
  • It has a simple interface
  • Comprises programmable reset polarity
  • It comprises Total Dose tolerance of more than 50 Krad (Si)
  • Also, it supports the Xilinx Alliance

Features of XQR1701LSO20N

  • It supports the Xilinx Alliance program
  • Furthermore, it requires one user I/O pin
  • It has a simple interface
  • Enables configuration one-time programmable read-only
  • Provides supports for XQ4000XL/Virtex fast configuration mode
  • It has 20-pin SOIC package (XQ1701L)
  • Ideal for storing multiple or longer bitstreams
  • It has Single Event Bit Upset immune
  • In addition, it is available in a 44-pin ceramic LCC (M grade) package
  • It is compatible with various FPGA solutions
  • Designed on Epitaxial Silicon to enhance latch performance
  • Comprises programmable reset polarity
  • Comprises Total Dose tolerance of more than 50 Krad (Si)
  • Certified by QML

Features of XQR1701LCC44MES

The XQR1701LCC44MES is another device that belongs to Xilinx QPro Series Configuration PROMs. It comprises a lot of features:

  • Provides supports for XQ4000XL/Virtex fast configuration mode
  • It supports the Xilinx Alliance
  • Also, it has a 20-pin SOIC package (XQ1701L)
  • It has Single Event Bit Upset immune
  • Certified by QML
  • It requires one user I/O pin
  • Ideal for storing multiple or longer bitstreams
  • It has a very simple interface
  • Enables configuration one-time programmable read-only
  • Designed on Epitaxial Silicon to enhance latch performance
  • It is available in 44-pin ceramic LCC package
  • It is compatible with various FPGA solutions
  • Comprises programmable reset polarity
  • It comprises Total Dose tolerance of more than 50 Krad (Si)

Features of XQR1701L-CC44V

The XQR1701L-CC44V device is a one-time programmable read-only memory. Also, this device is specifically designed to save up configuration bitstreams of FPGA devices.

  • Comprises active Low or active High to enable compatibility with other FPGA solutions
  • It is available in XQ1701L only
  • Can store several or longer bitstreams
  • It uses the Xilinx Alliance
  • Designed on Epitaxial Silicon to increase latch performance
  • It has programmable reset polarity
  • Certified by QML
  • Total Dose tolerance exceeding 50 Krad (Si)
  • It has got a very simple interface
  • It offers support to XQ4000XL
  • Furthermore, it is immune to Single Event Bit Upset
  • It is available in a 44-pin ceramic LCC package

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Features of XQR1701L-CC44M

This is another device that belongs to Xilinx QPro Series Configuration PROMs. It offers the following features:

  • Can store several or longer bitstreams
  • It is available in XQ1701L only
  • It uses the Xilinx Alliance
  • Certified by QML
  • Designed on Epitaxial Silicon to increase latch performance
  • It has programmable reset polarity
  • Total Dose tolerance exceeding 50 Krad (Si)
  • It offers support to XQ4000XL
  • It has immune to Single Event Bit Upset
  • Also, it has got a very simple interface
  • It is available in 44-pin ceramic LCC package
  • Comprises active Low or active High to enable compatibility with other FPGA solutions

Features of XQ1701LSO20V

The XQ1701LSO20V consists of several features. These features aid its functionality and performance when used in some applications.

  • Enables configuration one-time programmable read-only
  • It has a 20-pin SOIC package
  • Ideal for storing multiple or longer bitstreams
  • Requires one user I/O pin
  • Provides supports for XQ4000XL/Virtex fast configuration mode
  • Certified by QML
  • It has Single Event Bit Upset immune
  • Also, it is available in a 44-pin ceramic LCC package
  • It is compatible with various FPGA solutions
  • It has a simple interface
  • Comprises programmable reset polarity
  • It comprises Total Dose tolerance of more than 50 Krad (Si)
  • It supports the Xilinx Alliance

Features of XQR1701LCC44M

The XQR1701LCC44M offers great benefits and features. Also, the XQR1701LCC44M are 3.3V high-density configuration PROMs. Below are its features:

  • It has immune to Single Event Bit Upset
  • Also, it needs just one user I/O pin
  • Has a configuration OTP read-only memory
  • It supports Virtex fast configuration mode
  • Available in XQ1701L only
  • It has Total Dose resistance in excess of 50 krad
  • Programmable reset polarity makes it compatible with various FPGA solutions
  • Certified by QML
  • Designed on Epitaxial Silicon to enhance the performance
  • Can store longer or multiple bitstreams of Xilinx FPGA devices
  • It has a 44-pin ceramic LCC package

Features of XQ1701L-SO20N

The XQ1701L-SO20N is a device fabricated on Xilinx manufacturing lines with the use of epixatial substrates. It has the following features:

  • Manufactured on Epitaxial Silicon to enhance the performance
  • Available in XQ1701L only
  • It has immune to Single Event Bit Upset
  • Furthermore, it has Total Dose resistance in excess of 50 krad
  • It needs just one user I/O pin
  • Has a configuration OTP read-only memory
  • It supports Virtex fast configuration mode
  • Programmable reset polarity makes it compatible with various FPGA solutions
  • Can store longer or multiple bitstreams of Xilinx FPGA devices
  • Certified by QML
  • It has a 44-pin ceramic LCC package

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Features of XQ1701LSO20M

  • Enables configuration one-time programmable read-only
  • It has a 20-pin SOIC package (XQ1701L)
  • Requires one user I/O pin
  • Ideal for storing multiple or longer bitstreams
  • Provides supports for XQ4000XL/Virtex fast configuration mode
  • Enables configuration one-time programmable read-only
  • It has Single Event Bit Upset immune
  • It is available in a 44-pin ceramic LCC (M grade) package
  • Certified by QML
  • Comprises programmable reset polarity
  • It comprises Total Dose tolerance of more than 50 Krad (Si)
  • Manufactured on epitaxial substrates to enhance performance
  • It is compatible with various FPGA solutions
  • Also, it has a simple interface
  • It supports the Xilinx Alliance

Features of XQ1701L-SO20N

The XQ1701L-SO20N is another device that belongs to the Xilinx QPro family. Also, it offers these features:

  • Can store several or longer bitstreams
  • It is available in XQ1701L only
  • It uses the Xilinx Alliance
  • Certified by QML
  • Designed on Epitaxial Silicon to increase latch performance
  • It has programmable reset polarity
  • Total Dose tolerance exceeding 50 Krad (Si)
  • It offers support to XQ4000XL
  • It has immune to Single Event Bit Upset
  • Also, it has got a very simple interface
  • It is available in a 44-pin ceramic LCC package
  • Comprises active Low or active High to enable compatibility with other FPGA solutions

Features of XQ1701L-CC44M

  • It is available in XQ1701L only
  • Comprises active Low or active High to enable compatibility with other FPGA solutions
  • Can store several or longer bitstreams
  • It offers support to XQ4000XL
  • Designed on Epitaxial Silicon to increase latch performance
  • It has programmable reset polarity
  • Certified by QML
  • It uses the Xilinx Alliance
  • Total Dose tolerance exceeding 50 Krad (Si)
  • It has got a very simple interface
  • Also, it has immune to Single Event Bit Upset
  • It is available in 44-pin ceramic LCC package

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Features of XQ1701L-CC44B

  • Provides supports for XQ4000XL/Virtex fast configuration mode
  • Certified by QML
  • It has a 20-pin SOIC package (XQ1701L)
  • It has Single Event Bit Upset immune
  • Also, it is available in a 44-pin ceramic LCC (M grade) package
  • It is compatible with several FPGA solutions
  • In addition, it has an easy interface
  • Can store multiple or longer bitstreams
  • Comprises programmable reset polarity
  • It comprises Total Dose tolerance of more than 50 Krad (Si)
  • Requires one user I/O pin
  • Certified by QML
  • It supports the Xilinx Alliance
  • Enables configuration one-time programmable read-only

Feature of XQ1701LCC44M

  • It consists of programmable reset polarity
  • It has a very simple interface
  • Can store larger bitstreams
  • Demands one user I/O pin
  • QML certified
  • Allows configuration one-time programmable read-only
  • It has immune to Single Event Bit Upset
  • It is available in a 44-pin ceramic LCC (M grade) package

Conclusion

Xilinx features manufacturing and engineering capabilities that address complex issues. Also, this company provides various PROMs devices for different applications. The Xilinx QPro Series Configuration PROMs are radiation hardened. This Series Configuration PROMs addresses critical issues in the technology world.

Also, Xilinx configuration technology offers the most reliable method to store large bitstreams.  It offers reconfigurable FPGA solutions for high-end applications. Also, it has features that make it widely used in cost-sensitive applications.