ZHCSHJ2D February 2018 – April 2024 TUSB1044
PRODUCTION DATA
The TUSB1044 supports up to 4 DisplayPort lanes at data rates up to 10.0 Gbps (UHBR10). The TUSB1044, when configured in DisplayPort mode, monitors the native AUX traffic as it traverses between DisplayPort source and DisplayPort sink. For the purposes of reducing power, the TUSB1044 manages the number of active DisplayPort lanes based on the content of the AUX transactions. The TUSB1044 snoops native AUX writes to DisplayPort sink’s DPCD registers 00101h (LANE_COUNT_SET) and 00600h (SET_POWER_STATE). TUSB1044 disable or enable lanes based on value written to LANE_COUNT_SET. The TUSB1044 disables all lanes when SET_POWER_STATE is in the D3. Otherwise, active lanes are based on value of LANE_COUNT_SET.
DisplayPort AUX snooping is enabled by default but can be disabled by changing the AUX_SNOOP_DISABLE register. Once AUX snoop is disabled, management of TUSB1044 DisplayPort lanes are controlled through various configuration registers.