2. Ordering Information ..................................................................................................................................................... 4
6. Input/Output Function Description ................................................................................................................................ 10
7. Command Truth Table .................................................................................................................................................. 11
8. General Description ...................................................................................................................................................... 12
9. Absolute Maximum Rating ............................................................................................................................................ 12
10. DC Operating Conditions ............................................................................................................................................ 12
11. DDR SDRAM Spec Items & Test Conditions .............................................................................................................. 13
15. AC Operating Conditions ............................................................................................................................................ 17
16. AC Overshoot/Undershoot specification for Address and Control Pins ...................................................................... 17
17. Overshoot/Undershoot specification for Data, Strobe and Mask Pins ........................................................................ 18
18. AC Timing Parameters & Specifications ..................................................................................................................... 19
19. System Characteristics for DDR SDRAM ................................................................................................................... 20
21. System Notes.............................................................................................................................................................. 23
22. IBIS : I/V Characteristics for Input and Output Buffers................................................................................................ 24
-3-
K4H510438J
K4H510838J
K4H511638J
datasheet
Rev. 1.1
DDR SDRAM
1. Key Features
• V
DD
: 2.5V ± 0.2V, V
DDQ
: 2.5V ± 0.2V
• Double-data-rate architecture; two data transfers per clock cycle
• Bidirectional data strobe [DQS] (x4,x8) & [L(U)DQS] (x16)
• Four banks operation
• Differential clock inputs(CK and CK)
• DLL aligns DQ and DQS transition with CK transition
I wanted to use this sensor and 52 MCU to realize the function of temperature collection and 1602A display, but I don't know why the temperature remains unchanged. Can someone help me find out what's ...
I use the FIFO mode of the mini2440 serial port to send a txt file from the SSCOM32 on the computer and receive it on the development board. Why can I only receive up to 255 bytes? Once it exceeds 256...
I created the ram file system according to the following steps:char *ramDiskDevName = "/ram0" ;CBIO_DEV_ID cbio ; cbio = ramDiskDevCreate((unsigned char *)RAM_DISK_ADDRESS, 128, 1024*3, 1024*3, 0) ;if...
Experts: I want to make an image processing card now. I am still discussing the solution. Because I have no experience in FPGA development (I used to work in pre-sales, but now I have changed companie...
The electrolytic capacitor still has 300V voltage when the circuit board is powered off. Use your bad test lead to connect a 30K resistor in series. When repairing the board, just discharge the large ...
Assume that data is read from 8-bit AD (if it is a higher-bit AD, the data type can be defined as int), the subroutine is get_ad();
1. Limited secondary filtering
/* A value can be adjust...[Details]
introduction
my country has a vast territory and a large population. The scale of housing construction is huge, and the amount of residential construction is large and wide. It is still on t...[Details]
Today, with the increasing integration of functions, mobile phones can also be used as portable media players (PMP), digital cameras, handheld computers (PDAs), and even global positioning systems ...[Details]
introduction
Throughout the history of automotive lighting, power has always played an important role. Initially, cars only needed headlights to see the road in the dark. Later, other light so...[Details]
Floating-point digital signal processing has become a constant requirement for precision technology, often in applications requiring high accuracy in areas such as aviation, industrial machinery, a...[Details]
Abstract: In order to generate a stable excitation signal, the design of a digital frequency synthesizer is implemented on FPGA using Verilog hardware language. The design includes accumulator, wav...[Details]
1 Introduction
Solar street lights are mainly composed of four parts: solar photovoltaic cell components, batteries, charge and discharge controllers, and lighting fixtures. The bo...[Details]
Introduction
Power subsystems are becoming more and more integrated into the overall system. Power systems have moved from being separate "essential dangerous devices" to being monitorable...[Details]
AD8205 is
a single-supply high-performance differential
amplifier
launched by
Analog
Devices of the United States
. The typical single-supply voltage is 5V, and its common-mode volta...[Details]
1 Introduction
Intelligent control instruments are one of the most commonly used controllers in industrial control. They are mainly aimed at a specific parameter (such as pressure, tempera...[Details]
I've been studying dot matrix recently. It looks simple, but it takes a while to master it completely! The 8*8 dot matrix hardware circuit I'm making now is like this. The row is driven by 74HC138 + t...[Details]
Experimental tasks
A DS18B20 is used to form a temperature measurement system. The temperature measurement accuracy reaches 0.1 degrees. The temperature range is between -20 degrees and +50 de...[Details]
This controller uses PIC16C54 single-chip microcomputer as the controller, and it is very easy to use: just connect a telephone line to the loudspeaker through the controller, and you can rem...[Details]
Overview
In spectral measurement, photomultiplier tubes (PMT) and charge-coupled devices (CCD) are often used as photoelectric converters. PMT is used in slow-changing, high-precision spectral...[Details]
Investment in
the
medical device
industry has been on the rise in recent years. In the past two years, venture capital for medical devices has almost doubled, reaching $4 billion in 2007. Fr...[Details]
51mcu
京公网安备 11010802033920号
EEWORLD
