ZHCSIY2B July 2018 – August 2021 TPS65988
PRODUCTION DATA
The Charging Downstream Port (CDP) advertisement follows the USB BC1.2 specification. The advertisement scheme monitors the D+ line using the ADC. When a voltage of 0.6V is seen on the D+ line, TPS65988 forces a voltage of 0.6 V on the D– line until the D+ goes low. The voltage source VDX_SRC and the current source IDX_SNK, are activated during CDP advertisement. CDP advertisement takes place with the USB Host 15kΩ pull-down resistors on the D+ and D- lines from the USB Host Transceiver, because after CDP negotiation takes place on the D+/D- lines, USB2.0 data transmission begins.