$8 to $30
Pmod™ is the Digilent defined standard of Peripheral Modules, small I/O interface boards that offer an ideal way to extend the capabilities of programmable logic and microcontroller boards.
It is used as a computer’s main memory. Each DRAM memory cell comprises a transistor and a capacitor within an integrated circuit, and a data bit is stored in the capacitor.
$20 to $75
It is a small storage device made up of NAND flash memory and a simple storage controller. An eMMC acts as the primary storage for portable devices like cell phones
$20 to $100
A GPIO port handles both incoming and outgoing digital signals. As an input port, it can communicate to the CPU the ON/OFF signals received from switches or the digital readings received from sensors.