HSTL_I_12 - HSTL_I_12 - UG861

HSTL_I_12 uses V_CCO/2 as a parallel-termination voltage (V_TT). Optional untuned split input ODT provides Thevenin equivalent resistance of R (where R = Z₀) to the V_CCO/2 in HP I/O banks. The untuned on-die source termination feature (OUTPUT_IMPEDANCE) with optional 40 Ω, 48 Ω, or 60 Ω of driver impedance is available in HP I/O banks. In XP5IO I/O banks, termination is always calibrated. The default value of the driver output impedance is 48 Ω.