STULPI01A datasheet(20/44 Pages) STMICROELECTRONICS

20 / 44 page

Block description

STULPI01A - STULPI01B

20/44

6.9

Voltage regulator

Dual output ultra low dropout voltage regulator provides power supply for analog and digital

internal circuits. An external capacitor on both 3V3V and 1V2V pins is needed for proper

operation.

6.10

ID detector

This block provides sensing of status of the ID line. It is capable of detecting whether the pin

is floating or tied to the ground.

6.11

USB 2.0 PHY

The USB 2.0 PHY block provides complete physical layer transceiver for low-speed, full-

speed, and high-speed USB operating modes. Analog part of this block deals with

impedances adaptation, controlled voltage swing, and common mode voltage generation

and sensing. Digital part consists of serializer and deserializer, transforming serial bit

stream to 8-bit parallel port, and finite state machine implementing the PHY protocol layer,

bit stuffing, unstuffing etc.

Table 9.

VB_REF_FAULT configuration bit settings

RX CMD VBUS Valid

Use External

Vbus Indicator

Over-current_PD

Indicator Pass-true

Indicator

Complement

VBUSVLD

VBOC

VBOC and VBUSVLD

neg (FAULT)

FAULT

VBUSVLD and FAULT

VBUS_VLD and neg (FAULT)

STULPI01A Datasheet(PDF) 20 Page - STMicroelectronics