Enlarge / Samsung's newly announced 990 PRO with Heatsink SSD. (credit: Samsung)

Samsung's 990 PRO, its latest NVMe PCIe 4.0 SSD, aims to give gamers, 3D-renderers, and 4K/8K video editors a decent ratio of price to performance if this top-of-the-line drive can get close to its promised specs in real-world testing.

The 990 PRO is touted as offering "nearly the highest speed currently available from the new PCIe 4.0 interface" and a 55 percent increase in random performance over its 980 Pro . Samsung touts sequential read and write speeds of 7,450 megabytes per second (MB/s) and 6,900MB/s, respectively. Random read/write speeds are listed at 1,400K and 1,550K IOPS, respectively, based on IOmeter 1.1.0 performance. DRAM for the 990 PRO drives is 1GB per terabyte of storage, up to 4GB for the 4TB model.

Samsung suggests the performance bump comes from its own V-NAND and proprietary controller advancements. Power efficiency is improved up to 50 percent over the 980 PRO, the company claims, while a nickel coating and heat-spreading label dissipate heat. The heatsink model gives you more temperature assurance while, of course, adding RGB lights.

A while ago I decided to see if it is possible to read data from a NAND flash memory chip using an Arduino. Although I found out it is possible, it is not quite practical. The ATmega328 Arduino is way too slow to read and transfer large amounts of data. Nevertheless, dumping data is possible. But for common usage, such a slow and limited microcontroller shall not be used for this purpose.

In the previous posts I wired the NAND to a 3.3V Arduino and wrote a basic sketch to communicate with the flash chip and read its ID register. Now I will attempt to read data from the memory and transfer it to PC over serial port. I must say I have no prior experience with NAND memory chips and this is the first time I’m ever attempting this.

Značky: #Electronics, #NAND, #Arduino, #Elektro

NAND Flash chips are widely used non-volatile memory devices. They have high storage capacity, fast access time and are reliable, usually being able to withstand 100,000 erase/program cycles. Such chips are available with parallel or serial interface (commonly SPI). While the latter can be easily interfaced to any SPI port and can be read/programmed even by slow microcontrollers, parallel chips are faster and require more data lines (connections) to host microcontroller.

In the previous post I described the way I connected a NAND flash to Arduino (a Pro mini compatible board running at 3.3 V). This time, I'll deal with the limitation of the small MCU and read the NAND signature.

Značky: #Elektro, #Arduino, #NAND, #Electronics