SLLSFB2 April 2020 TUSB1146
PRODUCTION DATA.
Limited VOD mode is used to set the actual VOD level and is used when TUSB1146 is configured in limited redriver mode. In this mode the VOD is no longer a linear function of the input VID. For example, if the signal at TUSB1146's input (VID) is at 600mVpp then the TUSB1146's output VOD will be around 1000mVpp (assuming LINR_L3 is selected). The limited redriver mode is only supported in the upstream direction (RX1 -> SSRX and RX2 -> SSRX). The downstream paths will always operate in linear redriver mode. Limited redriver mode can be enabled by I2C register. This mode is not supported in GPIO mode. The TUSB1146 provides four different limited VOD settings. All four settings are available through register control.