Different devices use different process technologies to build the memory cells used to program a device. Which one is best?
Static Memory Technology (SRAM) Similar to the technology used in static RAM devices but with a few modifications. The RAM cells in a memory device are designed for fastest possible read/write performance. The RAM cells in a programmable device are usually designed for stability instead of read/write performance. Consequently, RAM cells in a programmable device have a low-impedance connect to VCC and ground to provide maximum stability over voltage fluctuations. Because static memory is volatile (i.e.-the contents disappear when the power is turned off), SRAM-based devices are “booted” after power-on. This makes them in-system programmable and re-programmable, even in real-time. As a result, SRAM-based FPGAs are common in reconfigurable computing applications where the device’s function is dynamically changed. The configuration process typically requires only a few hundred milliseconds at most. Most SRAM-based devices can boot themselves automatically at power-on much like a microproce
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