What brand is purplemicro?

Purplemicro is western number. Western Digital's purple series mechanical hard disks have been cultivating the monitoring market. Now the hard disk giants have launched their first microSD card product after acquiring Sandisk, aiming at the monitoring field.

The microSD purple card of western digital is obviously only for the field of monitoring data. Slightly higher pricing and shorter warranty indicate that this series of products is not cost-effective. When launching its own microSD card, there should also be some ideas to dilute the influence of Sandisk brand. What can be expected is the new green, green, blue and even black storage products that will be launched soon after Western Digital.

Sd mode

SD card has two driving modes: SPI mode and SDIO mode. They use different interface signals. In SPI mode, only four signal lines of SD card are used, namely CS, DI, SCLK and DO, which are chip selection, data input, clock and data output of SD card.

SD card * * * supports three transmission modes: SPI mode with independent serial input and serial output, 1 bit SD mode with independent instruction and data channels, unique transmission format, and 4-bit SD mode with extra pins and some reset pins. Support four-bit wide parallel transmission.