Xilinx uram vs bram

Last UpdatedMarch 5, 2024

推奨されるパイプライン段数は、最大の The Block Memory Generator LogiCORE™ IP core automates the creation of resource and power optimized block memories for AMD FPGAs. the same as used in ASICs. For example, if you have assigned a 4k (i. 4 I can select "Minimum Area" for the primitive choice algorithm however I cannot chose any such option when using the xpm_memory_sdpram macro. MYPARAM (3)) encrypted_core ( . I have ZCU 106 Evaluation kit and it can support 38Mb of BRAM. 10 ns, thus maximum operating frequency is 479 MHz (refer to page 22). You can also check about URAM/ultraram available in ultrascale devices The BRAMS on the fpga are blocks of RAM built in silicon I. log ファイルで確認するメッセージの一部と、その対処法を示します。. 赛灵思中文社区论坛. URAM은 다음과 같이 메모리의 width와 depth가 고정되어 있습니다. All the templates (speaking of both single port and dual port implementation) include pipeline registers. Apr 17, 2023 · コンテキストおよび状況によって、Vivado 合成により URAM のパイプライン処理に関するさまざまなメッセージが表示されます。. Resource figures are taken from the utilization report issued at the end of implementation using the Out-of-Context flow in Vivado Design Suite. 512 is the width and the depth is 16. 1's, checkerboard, inverse checkerboard (checkerboard_b) to find bad bits which then maps the bad frame to a spare frame. How to Optimize UltraScale Architecture Block RAMs for Low Power and High Performance. The core is designed as an AXI endpoint slave IP for integration with the AXI interconnect and system master devices to communicate to Xilinx FPGA의 URAM은 UltraScale+ 이상의 제품군에만 있는 dual-porl On-Chip 메모리입니다. I would recommend you to refer target FPGA resource guide LUTs have lowest access time, FIFO18/FIFO36 good timing performance but require effort in design migration, BRAM very good for scalable memory requirement . I know I can also control URAM vs. 選択したデバイスに URAM が含まれている場合、DPD v9. Ltd. Aug 30, 2023 · Hi, Are the URAM/BRAM used for the PLRAM already reserved by the platform for the Alveo U250? As in are the BRAMs already reserved for PLRAM usage even if I don't use PLRAM? 75680 - Vivado 2020. The maximum value is 16 for block RAM and 64 for URAM. This IP attaches to the FPGA configuration logic via the USER_ACCESSE2 primitive and So I can only use StandAlone Mode for URAM. Also, is Distributed RAM same as LUTRAM? I want to understand what is the exact use of these resources in a NetFPGA. The xclbin directory is required by the Makefile and its contents will be filled during compilation. in this case, by each address and data your Hi, I'm trying to generate a TDP RAM with Vivado HLS to have completely parallel RW support (in a SystemC module) However, HLS always generates a simple port RAM and multiplexes the address and data lines even after using: #pragma HLS RESOURCE variable=imgMem core=RAM_T2P_BRAM. Max URAM SIZE supported in u280. Please let me know if there is any We would like to show you a description here but the site won’t allow us. Hit OK. com Asia Pacific Pte. 1) August 14, 2014 Revision History The following table shows the revision history for this document. com:interface:bram_rtl:1. 0) July 16, 2020 www. Programmable Logic, I/O and Packaging. Based on the examples you provide, you could potentially fit one of your arrays in distributed RAM, with the remainder requiring multiple DRAMs or a single BRAM. T a b l e o f C o n t e n t s. Both URAM and BRAM are natively one clock latency reads; the data is available on the clock after the address and enable are asserted. Minimum BRAM size. I was wondering if anyone else has seen this issue or knows how to get a cleaner report? Capture. This ensures that the design is not distorted in order to Open Synthesized Design. where, frequency of DRAM will decrease with increase in its depth due to slice routing. also it mention it can cascade, isn't BRAM doing the same? for Zynq Ultrascale, max is 80 block or 22. com. Block RAM 、高速かつ柔軟なデータ The most of the points you mention correct. For BRAM/URAM assembled from many RAM primitives, trying to predict performance vs latency in advance can be tricky - since much depends on how Vivado assembles the primitives. When using the LogiCORE Block Memory Generator v8. And this simple dual port ram actually used up to 7. DEVICE ("7SERIES"), // Target device: "7SERIES" . com India Xilinx India Technology Services Pvt. May 11, 2019 · URAM usage is enabled by template parameter USE_URAM, which is false by default. If this is possible what it would be the difference between a local memory implemented with BlockRAM vs. I am developing a custom IP core that takes an AXI Stream input and writes that data to a (rather large) BRAM and then streams the data out of the BRAM to an AXI Stream output (the output order is different from the input order, so this is not a normal FIFO). Fill in the “Find” dialog box as shown below and the enter the name of your array (I have entered the word, RAM, as name of my array). Please let me know a way to generate a dual port RAM for imgMem. Hello, I would like to know if I can use the UltraRAM technology to instantiate the local memory (e. 0 IP GUI には、次に示すように、ハードウェアアクセラレータに BRAM ではなく URAM を使用するオプション ([Use URAM in HW Accelerators]) が表示されます。 Zynq ZCU208: I used Xilinx reference design (ZCU208_4g_play_cap_2021p2_RevA) to make 8x DAC (256K/channel, read from URAM) and 8x ADC (128K/channel, save to BRAM) running at 4GSPS Max URAM SIZE supported in u280. In dual port configuration there are two separate enables for both ports. www. Vivado. 65444 - Xilinx PCI Express DMA Drivers and Software Guide; I am working on a xczu4cg device with 100% bram usage. Xilinx doesn't go over which is better for what situation. True Dual Port RAM ( RAMB36E2). If a System Generator design with Dual Port RAM (DPRAM) blocks targets a mix of Block RAM (BRAM) and UltraRAM (URAM), then the generated HDL netlist targets all of the DPRAM blocks to BRAMs only. In addition, the total bandwidth of URAM seems more normal. 1 Updated bullet 11 in Block RAM Summary. 赛灵思中文社区论坛欢迎您 (Archived) — liuxiaoyan@ (Member) asked a question. Please check user constraints to make sure design is not over-utilized in the constraint areas (if any) keeping in mind some macros require a number of consecutively May 22, 2023 · How can a Block RAM be initialized in Vitis HLS. Hi Xilinx experts, I am experimenting with URAM with a simple program in Vivado HLS 2017. I want to build a DPRAM (524Mb) like this : - port A : write and read 32 bits words, 16k deep (16 384 words exactly) - port B : read 4096 bits words, depth 128 words Block Memory Generator in Vivado seems to be limited to this type of BRAM : - port A : write and read 32 For example, I want to use 4 banks of URAM with an access bandwidth of 288bits(URAM has a fixed datawdith of 72bits), and multiple URAM is cascaded for each bank. Thank you in advance. Flexible cascade capabilities allow UltraRAM blocks to be used in Could anyone who have experience doing such migrations provide some insight on what might be wrong and possibly pointers to Xilinx recommendation on how to do BRAM to URAM migration. DESIGN FILES¶. In “Schematic” tab, right AXI Stream output from BRAM. PNG Thanks Community! The total BRAM utilization is 63. デュアルポート RAM (DPRAM) ブロックを含む System Generator デザインで、ブロック RAM (BRAM) および UltraRAM (URAM) の組み合わせをターゲットにすると、生成された HDL ネットリストでは、BRAM に対するすべての DPRAM ブロックのみがターゲットになります。 Built-In FIFO vs Block RAM. I suggest you use a true dual-port BRAM, one port to be accessed by the PS using AXI BRAM Controller, the other accessed by a simple state machine in your PL. Block Ram tiles determination. In the Virtex UltraScale\+ family, all the columns of UltraRAM can be connected Cascade height specifies the number of BRAM/URAMs in a cascading structure. BRAM) and (in HDL) copy the initialization data from BRAM to URAM at power-up of the device. Hello, I found some language templates for inferring UltraRAM in the Vivado IDE (2017. 08, the total DSP utilization is 2 and the total URAM utilization is 0; A possible reason is high utilization of BRAMs, DSPs, URAMs, or RPMs. It is about a little bit over 270 Mb. Learn about the new block RAM cascade feature, how it is used, and how to leverage its power and performance benefits. In “Find Results” tab, right-click a line and select “Schematic” from pop-up dialog. The BRAM size is important for me because I am planing to store lists with millions of elements on BRAM. Distributed RAM は LUT を使用し、係数の格納、ステートマシン、および小規模バッファーとして有効です。. 2 version. consequently, it's enough to set write enable and BRAM enable pins of your port to the constant value '1'. Whist BRAM is a natively dual port RAM, there are other RAMs found in FPGA that are worth mentioning. , 4x1024x8 bits = 32768 bits) address range to the AXI BRAM controller, then if you set the data width as 32, the depth will be auto selected as 32768/32=1024. It supports just one clock and is fully synchronous. Block RAM versus Distributed RAM. When you have a simple DP RAM, there are only two data buses, one read and one write. This construction from scattered URAM/BRAM blocks can cause timing problems for address and data lines connected to the large-size memory - since address/data lines must fanout to the scattered blocks. 02K. As both ports are independent, there is the possibility for write collisions, as such the behavior of the UltraRAM is different depending upon which port performs the read or write I then removed the qualifier "static" and the design built just fine, apparently using BRAM instead. It is worth noting that if you did use a mix of DRAM/BRAM, you need to be aware of the read semantics of DRAM When using asymmetric ports in simple dual port RAM, synthesis consumes more block RAM (BRAM) blocks than is required. Question has answers marked as Best, Company Verified, or bothAnswered Number of Views 34 Number of Likes 0 Number of Comments 1. I am aware of the wastefulness of using URAM, but the rest of the BRAM resources are already fully utilized. 4). The AXI BRAM Controller is a soft AMD IP core for use with the Embedded Development Kit (EDK) and Vivado™ IP Integrator (IPI) or available as a stand alone core in the Vivado IP Catalog. Use of static doesn't seem to work. I wish to load the memory with some initial contents. PNG Capture2. As an example, with min area on LogiCORE Block Memory Generator v8. So, if you need TDP RAM then you must use BRAM. Number of Views 1. 5 tiles. To implement a large FIFO, the Wizard provides Built-In FIFO and Block RAM. Cheers, Mark AM007 (v1. Alveo™ Accelerator Cards. The tools should infer the correct number of BRAMs. It supports the LMB bus protocol and byte enable architecture. I am interested in the maximum frequency the BRAM on virtex-5 can run. Art Village Osaki Central Tower 4F 1-2-2 Osaki, Shinagawa-ku Tokyo 141-0032 Japan Tel: +81-3-6744-7777 japan. Both have the ability to add extra "output registers" to increase the latency to two clocks in order to reduce the clock to output time of the RAM. The Local Memory Bus (LMB) Block RAM (BRAM) Interface Controller is a module that attaches to one LMB. BRAM vs UltraRAM. AMD 製品では、さまざまなデザインのニーズに対応できるよう、異なる種類の内部メモリを提供しています。. g. Please let me know if there is any What bus errors you are observing when you have set memory primitive to URAM. The total URAM capacity is 181Mb, which means there are ~640 URAMs (288Kb per URAM). Finally, the BRAM is loaded from the . UltraRAM is a large, lightweight memory block that enables UltraScale+ devices to provide in excess of 500Mb of power- and cost-efficient on-chip data storage, equating to a 6X increase in on-chip memory vs. URAM은 288K 비트를 저장할 수 있는데 이는 BRAM 보다 8배 더 저장할 수 있는 양입니다. WRITE_WIDTH (8), // Valid values are 1-72 (37-72 only valid when BRAM_SIZE Jul 7, 2016 · I am using a Xilinx FPGA from the Kintek-7 family. 0 on my Verilog module. But i could not store my array data into either BRAM or URAM by using directives. BRAM_SIZE ("18Kb"), // Target BRAM, "18Kb" or "36Kb" . Hello, As per Atrix7 data sheet ds181, minimum clock period of DRAM is 2. The idea is to connect my module to the BRAM_PORTB of the Block Memory Generator below: The idea is to connect my module to the BRAM_PORTB of the Block Memory Generator below: Interpreting the results. Xilinx, Asia Pacific 5 Changi Business Park Singapore 486040 Tel: +65-6407-3000 www. 18k and 36k BRAM utilization. Accelerator binary files will be compiled to the xclbin directory. URAM, on the other hand, has a fixed configuration of 72b*4096. Block A, B, C, 8th & 13th Welcome to the Xilinx Forum! As described on about page 94 (and Table 2. The URAM primitives have configurable pipeline attributes in conjunction with dedicated cascade connections to enable high speed memory access. It is possible to achive this by using an AXI BRAM Controller connected to one of the BRAM ports, but in that case The AMD URAM Readback allows you to perform readback and writeback of URAM by providing the required logic around the URAM. whtats the difference between URAM and BRAM, seem to me just another ram without true dual port. dtsi) for the AXI BRAM Controller. The documentation for the memory resources can be found here. There are certain differences due to different design constraints, but the RAM architecture follows the same principles. Hello, I am working on vivado HLS c code implementation and trying to store my array data into BRAM and URAM memory. In RTL, we use (* ram_init_file = SYN_INITFILE *) synthesis attribute to specify the mif file containing initial values. ); I'm finding that BRAM seems to be reporting as URAM in the utilization report, and URAM isn't called out explicitly for usage in the report. Only a single RAMB36 block should be required for this. Is there documentation that covers this. I wouldn't hold my breath waiting for Xilinx to provide this "indirect" initialization for you. Vivado 2017. Design Entry & Vivado-IP Flows. It told me that U200 has 1766 x 36kb block RAMs. com 2 UG573 (v1. Jan 28, 2020 · In this case the dlmb_bram_if_cntlr: Again, we can read the block properties for the dlmb_bram_if_cntlr: Here we can see all the BRAM modules connected to the memory controllers. P. 5Mb, but then in the doc. I use ram_style as "block" which I would like to all the CAM instance to infer BRAM, but few of them gets mapped to URAM. The dual-port nature of these memories allows for parallel, same The resource utilization statistics for NetFPGA SUME shows LUT, LUTRAM, FF, and BRAM parameters. When I use the xilinx template to instantiate a URAM with data width 128 and size 1,500,000. Port A read/write width: 32, Read/Write depth: 12288. Moreover, I am new to BRAM so appologies if it is something basic. The device tree is altered to add the BRAM memory range to the May 1, 2012 · I'm a bit unclear on if you actually want to use the embedded BlockRam blocks, and Xilinx may have changed the functionality in ISE 13, but in ISE 12 at least, it isn't possible to infer true dual port blockram with different aspect ratios - you'll need to instantiate them through for instance CoreGen. In this case it is the lmb_bram. I learned that the block RAM tile's size can be actually up to 36K bits. A memory unit in the DPU has a width of ICP*8 bits and a depth of 2048. Date Version Revision 08/14/2014 1. Each URAM has 2 72bit-ports, and the frequency of URAM is: F =69×1000Gbps / （640×72×2） = 748MHz. BRAM with HLS pragmas, but regardless of how I do this, is there a performance advantage one way or the other between the two types of memory? The issue is that there are a limited number of switch-box connections in and out of the BRAM. Furthermore, I need asymetric Dual Port RAM. 1. 7. URAM 한 개에는 8-bit 크기의 픽셀 My interpretation of the comment from UG573 is that true initialization of URAM is not physically possible. However, this way I cannot connect AXI BRAM Controller (necessary to communicate with PS) to URAM directly, because it is byte-addressing and the datawidth, byteenable and some other signals of the BRAM_PORT side of BRAM Controller is different with URAM Native interface. Product Description. Feb 11, 2020 · 3 Accessing BRAM Using /dev/mem 3. com) This design used too many URAM blocks and it failed. com Versal ACAP Memory Resources Architecture Manual 2 Se n d Fe e d b a c k. bit image (configuration). Hello everybody, In my current design I need to internally bufferize AXI4-Stream data before consuming them. Please let me know if there is any I'm trying to make Vivado infer a MASTER xilinx. Can someone please elaborate this and help me understand it? What is a Block RAM in an FPGA? Learn how to create BRAMs in VHDL and Verilog, for use in Dual Port RAMs, FIFOs, and more! Tutorial for beginners. 5 Mb. The followings are what I have tried to make it work but in all cases the URAM is not inferred. The size is actually 512x16. When i pass an array as parameter from test bench (main function) to top level function, where I use ram_style as "block" which I would like to all the CAM instance to infer BRAM, but few of them gets mapped to URAM. 4 my 36x4193 ram will use 5 RAMB36E1s while xpm_memory I am instantiating a Block RAM Macro BRAM_SDP_MACRO in my Verilog COde using XIlinx ISE 14. 次の表に、vivado. Questions about Xilinx UltraRAM inference templates. Thanks in advance. October 29, 2020 at 6:22 AM. Built-in knowledge about AMD Each BRAM block consists of two 18K BRAM slices, which can be configured as 9b*4096, 18b*2048, or 36b*1024. Increase array size to use all URAM, change size of array to 4k*960 with 72 bit element size (matching 960 available URAM in Virtex UltraScale\+ UV9P FPGAs) Since URAMis much faster than BRAM, by increasing the number of array access I hoped to fix "WARNING: [BIND 205-102] The specified resource Feb 28, 2017 · A single slice can potentially provide a 256 x 1-bit, single port RAM). S I checked below but it doesn't cover the URAM memory bits. Block-RAM (BRAM) modules can be configured in several different ways. I have an encrypted core that uses a lot of memory. However, maximum operating frequency of BRAM is stated as 509 MHz (refer to page Inferring UltraRam in Virtex UltraScale+ VU9P Devices. In the documentation, the total number of uram 288kb in dynamic region is 960. Maximum frequency is measured using the Out-of-Context flow to synthesize and implement the IP instance in isolation. BRAM is tested upon power on, or if PROG_b is asserted, Writes 0's. Application code is located in the src directory. Here below are my understandings and some doubts. A deployment shell enables the card to be configured from onboard memory through PCI Express. Unlike BRAM, each URAM is dual port and fixed size of 4k by 72 bits, and has a single synchronous clock for both ports, and both ports are completely independent. Hi, I am designing a system on a Zynq 7030. Consequently, my idea was to use Dual Port RAM IP and to bufferize data through one port and consume them through another port. How can I prioritize the module to try using ultraram and lutram before using bram? (* ram_style="ultra" *) encrypted_core # (. 3 days ago · AMD FPGAs, SoCs and MPSoCs support many different memory technologies internal memory or external memory to the device. UltraRAM. We are using 2020. That is, you will get most efficient use of URAM when your data-width is a multiple of 72 bits. Hi, I want to see a comparison between read/write latencies for Ultra RAM and BRAM. UltraScale Architecture Memory Resources www. Block RAM: Stand Alone vs BRAM Controller Modes. 1 - Place 30-859 Some BRAM area constraints are over utilized. The synthesis log message makes the impression that Vivado understands the intention (ram_style="ultra"), but refuses to infer URAM anyway. What bus errors you are observing when you have set memory primitive to URAM. BRAM with HLS pragmas, but regardless of how I do this, is there a performance advantage one way or the other between the two types of memory? Aug 20, 2018 · The BRAM is a dual-port RAM module instantiated into the FPGA fabric to provide on-chip storage for a relatively large set of data. The UltraScale+ portfolio uses a new storage method. Zynq Migration Guide: Zynq-7000 SoC to Zynq UltraScale+ MPSoC Devices (xilinx. Changed description of CASDINPA[3:0] and CASDINB[31:0] in Table 1-6 . How I can make BRAM of this size as write depth is limited to 1048576, which leads to 1048576*32=33554432, almost 33. Unlike BRAM, URAM doesn't support independent clocks for the read and write ports. Here, ICP stands for the input channel parallelism, which varies across different DPU architectures. 128KB) of the MicroBlaze soft-core. Since there is not a driver for the BRAM this should not be an issue. e. BRAM数据位宽. Alveo™ アクセラレーターカード. By looking at the code it seems the minimum number of pipeline registers is 2, which would result www. Pipeline stages and cascade connections are configured using attributes on primitives. However Ultra-RAM (URAM) modules have a fixed configuration of 4K x 72 (ref UG573). BRAM is inferred using the BIND_STORAGE pragma, #pragma HLS BIND_STORAGE variable=buffer type=RAM_T2P impl=BRAM. Some places to look for performance specifications of BRAM and URAM are: the datasheet for your device Increase array size to integer multiple of 4k. Note that URAMs also have a greater number of pipeline registers than BRAM, so take that into account in when you infer your . August 8, 2016 at 9:18 AM. K. *. It also defines the relevant commands that can be issued for readback and writeback via the AXSS register in the configuration interface. I then removed the qualifier "static" and the design built just fine, apparently using BRAM instead. 5Mb in Virtex UltraScale\+ devices. dmitry1417 (Member) asked a question. So the size is actually only 8K. The LMB BRAM Interface Controller is the interface between the LMB and the BRAM block peripheral. I am trying to get the logic right for the AXI What bus errors you are observing when you have set memory primitive to URAM. BRAM_SDP_MACRO # ( . The lmb_bram block is created using the Block Memory Generator (BMG). However, you could initialize something else (eg. com Japan Xilinx K. The two types of BRAM memories available in a device can hold either 18k or 36k bits, and the available amount of these memories is device specific. You need to change the data width and address range of the BRAM controller to change the width and depth of the Block memory generator IP. Functionality is bit-exact with BRAM implementaion: checks pass C-sim, RTL co-sim and zcu104_rv board runs for NN and Bi-linear filtering modes on fractional coordinates. Feb 22, 2024 · Block Ram (BRAM) Block mbence76 March 22, 2024 at 8:25 AM. In your case, URAM cannot be configured as True Dual Port (TDP) RAM - but can be configured as Simple Dual Port (SDP) RAM. From Vivado main menu select “Edit > Find”. But when I create a new project on Vivado, it tells me that it has 2160 block RAMs. Liked. However, I tried to implement a simple design using a RAM18SDP primitive, with output register enabled, and added registers immediately in front and after the BRAM. When you have a true dual port RAM there are four data buses, read and write for each of two ports. I am wondering can I just multicyle o Product Description. 1) of UG573, many of the configurations for BRAM cannot be used for URAM. writing procedure to a BRAM is simple since you are only using the port for writing. The data sheet claims that on a -1 speed grade Virtex-5 chip, the BRAM can run as fast as 400MHz. Hello,I am trying to create a BRAM of 37 Mb. 28nm Xilinx FPGAs. Example 1: An XPM Memory (SDPRAM) where Port A is 512 x 64 and Port B is 2k x 16. 嵌入式开发. Is there a way to instruct synthesis tool to AVOID inference of URAM? Synplify_premier has this feature : syn_ramstyle = "block_ram, no_uram" which infers only BRAM and avoids URAM. Xilinx® AlveoTM U200 and U250 Data Center accelerator cards are PCI Express® Gen3 x16 compliant cards designed to accelerate compute-intensive applications such as machine learning, data analytics, and video processing. Any access size up to the width of the LMB data bus is permitted. PNG Capture1. As mentioned above, the address range was 64KB, or 65536 Bytes. I have 4625000 values of 8 bits. So, you could use a URAM to make a synchronous FIFO, but not an asynchronous FIFO. 1. We would like to show you a description here but the site won’t allow us. Hello All, I am trying to instantiate a simple dual port ram. 4, Zynq 7000. It is impossible to store anything, anywhere, and recover it after power or PROG_b. The program adds up all elements in two arrays and I want to store the arrays in URAM rather than BRAM. it says " Zynq UltraScale\+ devices or up to 22. (Fig 1) But the data width cannot be set at will for Block Memomy Generator when selecting BRAM Controller Mode(using block design, URAM is unavailable in IP Catalog). Hi All, It seems that the only difference between the interface of the Block RAM in the Stand Alone and BRAM Controller Modes are reset signals Block RAM in the BRAM Controller mode has rst signals in its interfaces but in the Stand Alone mode it doesn't has themIs this the only difference? This construction from scattered URAM/BRAM blocks can cause timing problems for address and data lines connected to the large-size memory - since address/data lines must fanout to the scattered blocks. 请问BRAM在实际用的过程中一般数据位宽是多少呢？. The total size is smaller than the documented size. This could change in the future such that disabling the driver in the status is done. Total bandwidth of VM2902's URAM is 69Tbps. The memory I need to pack into URAM is not very wide, but quite deep. Available through the (add ref to Vivado™) ISE™ Design Suite CORE Generator™ System, the core enables users to create block memory functions to suit a variety of requirements. 1 Linux Device Tree By default the device generation process will generate a node in the PL device tree (pl. Here are some important excerpts from the document (referencing pages 11 and 12): The block RAM in Xilinx® 7 series FPGAs stores up to 36 Kbits of data and can be configured as either two independent 18 Kb RAMs, or one 36 Kb RAM. xilinx. The LogiCORE™ AXI LMB Bridge IP is designed to be used in embedded applications where AXI4 access to a MicroBlaze BRAM or URAM local memory connected via LMB is required, for example to load software in the local memory. as fd lj es sy nc sj di ld yp