DDR3-1066可以测试通过 DDR3-1333测试通过不了 老是报异常“DDR3 leveling has failed, STATUS = 0x40000064” 表示“Read DQS Gate Training Timeout”、“Read Data Eye Training Timeout” 西安紫光的SCB15H2G160AF-13KI(CL = 11 (DDR3-1600))的和镁光的MT41J128M16(CL = 11 (DDR3-1600))看参数...
考虑到DDR3full leveling特性(也叫做auto leveling)是write leveling, read data eye training和read DQS gate training的总称。由于Fly-by的结构,不同DDR3颗粒间的控制、时钟和数据总线时序都是靠leveling来保证,所以需要配置Leveling Register(具体的请参见DDR3 Software Leveling and Registers Configuration) 1.需先...
DDR3 PLL配置函数:int KeyStone_PLL_init (PLL_ControlRegs * PLL_Regs, unsigned int inputDivisor, unsigned int multiplier, unsigned int outputDivisor)3、 Leveling Register的配置和考虑考虑到DDR3full leveling特性(也叫做auto leveling)是write leveling, read data eye training和 read DQS gate training的...
Read and Write Leveling: 这是一个过程,通过它,控制器可以自动调整数据线与时钟之间的相位关系,以确保数据在正确的时钟边缘被采样或输出。 Training Algorithms: DDR3和DDR4控制器包含一系列的训练算法,如write leveling、gate training、read training等,这些算法在上电初始化期间自动运行,以优化数据和时钟之间的时序...
calculated settings spreadsheet, and made the 'DDR Output Clock Frequency' equal to 666 2/3 MHz (such that 'DDR Output Clock Period' is exactly 1.5ns). When we ran with those settings, PGSR0 returns with 0x80C00FFF indicating a 'Write Leveling Adjustment Error' and 'DQS Gate Tra...
Are the value of DX6LCDLR2 register the result of READ DQS gate training? Q2. If anwser of Q1 is yes, I want to check the signal durning the training. Is it available to start only READ DQS gate training by setting QSGATE bit of PHY Initialization Register?
We are currently working on write leveling, gate training and read leveling on a Vybrid-based board with external DDR3 memory (Micron MT41K256M16HA-125 AIT:E). Unfortunately, we are unable to obtain any values for the rising edge using the procedures described in chapter 10.1.16 of the ...
73068 - Design Advisory for UltraScale/UltraScale+ DDR4/DDR3 IP - Memory IP Timing Exceptions Might Manifest as Post Calibration Data Errors or DQS Gate Tracking Errors in Hardware Description Version Found: DDR4 v2.1 (Rev. 1), DDR3 v1.3 (Rev. 1) released with Vivado 20...
Figure 1. Skew accumulates when reading a DDR3 module. This skew between CLK and DQS signals in DDR3 is compensated with write leveling. Additional elements that come into play include theglass weave of the laminate, the all-importantPCB stackup, and the inductance of vias. John says, “Th...
1. A memory interface comprising: a clock output circuit to provide a first clock signal to a memory device; a write path to write data to the memory device, the write path comprising: a DQS output circuit comprising first and second flip-flops clocked by a second clock signal, and a fi...