VSSD refers to the low potential of the digital power supply equivalent to digital ground.
"VSSD" typically refers to the "Voltage Source Supply Digital" or simply the "Digital Ground" in the context of electronics and integrated circuits. It serves as the reference voltage level for digital components within an electronic system or integrated circuit.
In mixed-signal systems, such as microcontrollers or digital signal processors, there is often a clear separation between the analog and digital portions of the circuit. VSSA (Analog Ground) and VSSD (Digital Ground) are used to ensure this separation. The digital ground is used as the reference for digital signals and components, while VSSA serves as the reference for analog signals and components.
Keeping the digital and analog grounds separate helps prevent interference between digital and analog signals, which is crucial for maintaining signal integrity and minimizing noise in mixed-signal systems.
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