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What is video memory encapsulation

Video memory packaging refers to the memory of the particles used in the packaging technology type, packaging is the memory chip wrapped up to avoid the chip and the outside contact to prevent the damage to the chip outside. Impurities in the air and bad gas, and even water vapor will corrode the precision circuit on the chip, resulting in a decline in electrical performance. Different encapsulation technology has great difference in manufacturing process and process, and it plays an important r

Can three-channel +DDR3 be universal? Memory change in progress (next)

DDR3 to seize the class 1.8bit prefetching design, and DDR2 for 4bit prefetching. Compared with the 4bit prefetching mechanism of DDR2 memory, the biggest improvement of DDR3 memory module is the design of 8bit prefetching mechanism, which is concurrent 8-bit data. At the same cell frequency, the data transmission rate of DDR3 is twice times that of DDR2. The f

What is the DDR3 memory?

DDR3 video memory can be seen as an improved version of DDR2, both of which have many similarities, such as the use of 1.8V standard voltage, mainly 144Pin spherical pins FBGA package. However, DDR3 core has improved: DDR3 video memory using 0.11 micron production process, the power consumption is significantly lower than DDR2. In addition, DDR3 video memory using the "Pseudo Open Drain" interface technolog

One of the DaVinci U-boot series: U-boot Introduction

connected to the VGA output port of the SEED-DVS6446 platform. Vista Linux icon. 4. if u-boot is not required for direct installation from CCS to DDR, the general script file of CMD is as follows: -Lrts32e. Lib -L... \ CSL \ Arm \ Lib \ debug \ csl_davinciarm9.lib -L... \ .. \ Lib \ davincievmbsl. Lib -Stack 0x00000800 -Heap 0x00000800 Memory { Iram: O = 0x00000000 L = 0x00004000 DRAM: O = 0x00008000 L = 0x00004000 Aemif: O = 0x02000000 L = 0x02000000 DDR2

Pay attention to the matching between CPU bandwidth and memory bandwidth! Don't let the memory slow down the CPU.

has to discard the 850 chipset and re-launch the 845 chipset that supports SDRAM to match P4. This may be the case when we buy P4 earlier. Motherboard In fact, the performance of P4 is restricted by the memory. The 845d, 848, and other chipsets that later support DDR single-channel memory did not solve the problem perfectly. Later, the 865 chipset that supports "dual-channel" was used to solve the problem. The dual-channel ddr266 bandwidth meets the P4 of fsb533, while the dual-channel ddr400

20145225 "Information Security system Design Fundamentals" 7th Week Study Summary

.) ) Extended Data Output-edo DRAM: allows individual CAS signals to be tighter in time. Synchronous-sdram: Replace many of these control signals with the rising edge of the same external clock signal as the drive storage controller-faster than asynchronous. Double Data rate synchronization-ddr SDRAM: doubles the speed of the DRAM by using two clock edges as the control signal. Category: DDR (2-bit), DDR2 (4-bit), DDR3 (8-bit) RDRAM

Analysis of Linux memory layout based on mini2440

, execution, storage is through the address, so it can be used to do memory.RAM According to hardware design, random memory is also divided into dram (dynamic RAM) and SRAM (static RAM) random memory.L DRAM: Its basic original is a small capacitor, the capacitor can be on two plates for a short period of time to retain the charge, can be through the polarity between the voltage difference between 0 and 1 of the computer, due to the physical characteristics of the capacitance, to regularly charge

Linux device-driven I/O ports and I/O memory __linux

interface, then put the address on the address bus select、read, the required control information on the control bus, you can communicate with the device.For a system, there are usually multiple peripherals, each peripheral interface circuit, there will be more than one port, each port needs an address, for them to identify a specific address value, is the system must be resolved, at the same time, you also have a memory bar, may be 512M or 1G or greater Kingston, Modern

The relationship between CPU frequency and memory frequency

First make clear memory of three frequency, core frequency, operating frequency, equivalent frequency (also into interface frequency), usually said that the DDR2 800 of the 800 is the equivalent frequency of the memory (interface frequency), but also the most meaningful frequency, and memory bus bandwidth directly linked, such as DDR2 The 800 bandwidth algorithm is 800MHZX64/8, or 6.4gb/s. and the operating

"Go" Linux device-driven I/O ports and I/O memory

be sent to? At this point you need to assign an address to each interface, and then put the address on the address bus, the control information needed to put on the control bus, you can communicate with the device.For a system, there will usually be multiple peripherals, each peripheral interface circuit, there will be more than one port, each port needs an address, for them to identify a specific address value, is the system must solve the matter, at the same time, you also have a memory bar,

Architecture of the Da Vinci digital media on-chip system and Linux Startup Process

, everyone is most concerned with the resource allocation between two cores, communication methods, and how to efficiently achieve resource sharing. ARM exclusive (DSP unavailable) peripherals include: UART0/1/2, I2C, watchdog timer, PWM0/1/2, ARM interrupt controller, USB2.0, ATA/CF, SPI, GPIO, VPSS, EMAC/MDIO, emifa control, VLYNQ, MMC/SD. Peripherals of DSP exclusive (ARM unavailable) include DSP interrupt controller and VICP. Peripherals shared by ARM and DSP include EDMA, Timer0/1, Power S

DDR3 Introduction (i)

JEDEC was established in 1958 as part of the Association of Electronic Industry Associations (EIA) to set standards for the emerging semiconductor industry. Key features include terminology definitions, product characterization, test methods, solid state memory, DRAM, flash memory cards, and RFID tags for identification and standardization.In the DDR2 era, the maximum operating frequency of JEDEC's DDR2 was

DBA should know about raid cards

has multiple speeds. Currently, SCSI drives can run at least rpm, which is faster than ide drives. In most cases, enterprise-level servers may adopt SCSI technology, which is a better choice. Disk capacity You can now get several larger GB drives. If you want to store a large amount of infrequently accessed data, there is no problem. However, the large disk capacity cannot be helpful for writing large amounts of data as quickly as possible. Increasin

Compared to who consumes power: Windows7, Ubuntu11.04 power consumption competition

Opteron 2384 quad core processor, tai'an S2932 motherboard, FirePro V8700 graphics card, 4 gb ecc R-DDR2 memory, Western Digital 160 GB WD1600YS-01S hard drive. High-end desktop with three cores: Phenom II X3 710 processor, MSI 890GXM-G65 motherboard, Radeon HD 4650 graphics card, 4 GB DDR3 memory, Seagate 250 GB ST250310AS hard drive. There are four test environments -- System Startup: After the system is idle for a period of time, it is cold-starte

What is the memory type?

At present, the main types of video memory used in the market are sdram,ddr sdram,ddr sgram two kinds. Sdram SDRAM is the abbreviation of synchronous dram, meaning: synchronous dynamic random memory. It works in sync with the graph bus, avoids the extra wait time required to operate the asynchronous DRAM on the system bus, and speeds up the data transmission. Development experience: DDR->DDR2->DDR3 Sgram

NF5 Compatibility Problem Solving method

AM2 processor After some of the adjustment of the column, Athlon64 3000+ and Athlon64 X2 3800+ has become the AMD platform cost-effective pronoun, and the matching NF5 series motherboard has become the focus of attention. Recently, some buyers of NF5 motherboards reflect that in the dual-channel DDR2 667 specifications of the memory will encounter serious compatibility problems, the forum for help Voice. If you're being bothered by NF5 motherboard and

The relationship between RBL, UBL, and uboot porting at the underlying layer

the dsp_bt pin level. If it is high, it is self-guided. If it is low, it is guided by arm. 2. UBL stage, that is, U-boot stage : Ti officially provides U-boot, so the U-boot startup process is described here. In the initial phase of U-boot, the system clock and DDR frequency are initialized to prepare the environment for loading the C program. At this time, the program runs in arm Ram or nor flash, which is determined by the startup method. Copy the U-boot code to the DDR and jump to t

Select the AMD K8 CPU. Do you pay attention to the memory combination?

divider = DDR/DDR2 memory bus frequency = DDR/DDR2 memory operating frequency * 2 * Note: If memory divider is not an integer, for example, 4.6, you must set memory divider to 5 to avoid Memory overclock operations. For amd AM2 athlon 64 3200 +, the CPU frequency is 200 MHz * 10 = 2000 MHz. If we use DDR2 667 memory --> The data transmission rate is 667 MHz, the

Computer Motherboard hardware knowledge research and development products

graphics G31, there are currently 7 models. Bearlake's 7 models, commercial-oriented to start with Q, including Q35 and Q33, for the household including high-end products and two series of mainstream products, high-end products have X38, mainstream products have P35, G35, G33 and later joined the G31. Where the G Word starts with a motherboard chipset product with integrated graphics. High-end X38: Support Quad core processor, ddr3-1333 memory, PCI-E 2.0, pci-e x16x2, front-end bus 1333MHz, w

What does it mean to DDR3 memory?

DDR3 is a computer memory specification. It belongs to the SDRAM family of memory products, providing a higher operating performance compared to DDR2 SDRAM and lower voltage. Introduction to DDR3 Technology DDR3 SDRAM in order to save power, faster transmission efficiency, the use of SSTL 15 I/O interface, operating I/O voltage is 1.5V, the use of CSP, FBGA package packaging, in addition to the continuation of D

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