Serial dram memory

This 8-pin, SPI device supports unlimited instantaneous writes to the memory array, making it ideal in applications such as meters, data loggers, data recorders or black boxes. These devices are available in Kbits and 1 Mbit densities.

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Serial SRAM. Read more. RAM Expansion Options. Fast page mode dynamic random access memory - Normal memory access requires that a row and column address, which takes time. Paging allows faster access to all the data within a given row of memory by keeping the row address the same and changing the column. Extended data-out dynamic random access memory - unlike DRAM, can fetch a block of data while simultaneously sending a block of data to the CPU. Unlike regular DRAM which can allow access to only one byte of information at a time, EDO allows an entire block of memory to be moved into the internal cache for quicker access by the CPU.

Can only be used on a bus speed of up 66 MHz. SDRAM delivers information in very high speed bursts and run in synchronization with the memory bus. Rambus dynamic random access memory - a type of memory designed by Rambus.

RDRAM uses a special high-speed data bus. DDR modules have pins. The type of RAM you need for your system depends on the motherboard. In general A modern motherboard bought in e. What do the markings on your memory chips mean? The memory module itself may have a part number as well as the memory chips, which may have different part numbers. The chip part number not the module part number is the most important in helping us determine the memory capacity and other details.

The part number on memory chips tend to have 2 or 3 lines of text on them that include a part number, speed, and date code. The exact part number is manufacturer-specific. The table below shows the codes for various manufacturers.

Texas Inst. To find information about a particular memory chip, just carry out an Internet search including the first few digits of the part number as a keyword. Or you could try going to the chip manufacturer's web site and searching for the part number there. You may see memory specified as 1Mx16 or 4Mx4 say. To get the total amount of memory on a memory module, multiply the chip capacity by the number of chips ignoring any parity chips and divide by eight to convert it to bytes.

Example: A module with 2 4Mx4 chips has a module capacity of. Let us go back to the original question of how we obtain useful information about mysterious RAM.

We wanted to identify the module type, chip type, amount of memory and data transfer speed. We can identify module type by looking at the connector edge and size of the module. We can identify chip type by carrying out an Internet search using the chip serial numbers. A successful search will give us information on chip type, chip memory size and data transfer speed.

Site Home. Assignments Scheme of Work Resources Information. Learning Center. This Unit Resources Lecture Material. Module Type Memory chips are usually mounted on a separate printed circuit board PCB called a memory bank or module that can be plugged into a connector on the motherboard.