ZHCSFY1F December 2016 – April 2024 TDP158
PRODUCTION DATA
HDMI 2.0 standard requires a source termination impedance in the 75Ω to 150Ω range for data rates > 3.4Gbps. HDMI 1.4b requires no source termination but has a provision for using 150Ω to 300Ω for higher data rates. The TDP158 has three termination levels that are selectable using pin 16 when programming through pin strapping or when using I2C programming through reg0Bh[4:3]. When the TMDS_CLOCK_RATIO_STATUS bit, reg0Bh[1] = 1 the TDP158 automatically turns on the 75Ω to 150Ω source termination otherwise the termination must be selected. Table 7-4 provides more information.
Pin 16 | Reg0Bh[4:3] | Source Termination |
---|---|---|
TERM = L | 00 | 150Ω ≅ 300Ω |
TERM = NC | 01 | None |
10 | Automatic set based upon TMDS_CLOCK_RATIO_STATUS bit | |
TERM = H | 11 | 75Ω ≅ 150Ω |