How many registers does each I/O element in Mercury have?
Each I/O element in the Mercury devices has three registers: an input, an output, and an output-enable (OE) register. In addition to providing fast bi-directional pin performance, these registers also enable DDR I/O circuitry in Mercury devices. Q: How many PLLs do Mercury devices have? A: Mercury devices have either two or four general-purpose phase-locked loops (PLLs) with four synthesizable clocks each. These PLLs can generate up to twelve different clocks at once. There are also two HSDI PLLs that support the CDR and source-synchronous modes in the HSDI circuitry. Q: How are the Mercury general-purpose PLLs different from APEX 20KE & APEX 20KC general-purpose PLLs? A: Mercury general-purpose PLLs are an enhanced version of the APEX 20KE and APEX 20KC PLLs. Each Mercury general-purpose PLL has four outputs: three internal and one external. These PLLs can drive the global fast lines as well as global clock lines. Additionally, Mercury general-purpose PLLs offer an increased range for
Each I/O element in the Mercury devices has three registers: an input, an output, and an output-enable (OE) register. In addition to providing fast bi-directional pin performance, these registers also enable DDR I/O circuitry in Mercury devices. Q: How many PLLs do Mercury devices have? A: Mercury devices have either two or four general-purpose phase-locked loops (PLLs) with four synthesizable clocks each. These PLLs can generate up to twelve different clocks at once. There are also two HSDI PLLs that support the CDR and source-synchronous modes in the HSDI circuitry. Q: How are the Mercury general-purpose PLLs different from APEX 20KE & APEX 20KC general-purpose PLLs? A: Mercury general-purpose PLLs are an enhanced version of the APEX 20KE and APEX 20KC PLLs. Each Mercury general-purpose PLL has four outputs: three internal and one external. These PLLs can drive the global fast lines as well as global clock lines. Additionally, Mercury general-purpose PLLs offer an increased range for
