Description

VIA Lab’s VL107 is a highly integrated single chip DisplayPort Alt-mode and USB Power Delivery 3.0 controller with secure FW update console designed for USB-C multi-function docks with charge through function. Integrated USB-C charging UFP, VL107 can perform DP alt-mode video output functionality and simultaneously charging connected PD host once external power source is detected. Integrated second USB-C DRP can either connect to USB-C power adapter to charge PD host or connect to USB-C devices to access data transfer. A D+/D- charging ePHY is integrated to support chargers using D+/D- pins to do power protocol handshake and then converted to USB PD protocol. VL107’s Device Policy Manager could negotiate power rules between its DFP and UFP then enable power charge through. Charging a host under dead battery mode and PD3.0 fast role swap are supported. DP AUX channel to USB-C SBU1/SBU2 switch is built-in to meet DP Alt-mode AUX channel resistance requirement. USB Billboard device function is built-in to meet “VESA DP Alt-Mode on USB Type-C” spec. VL107 also support smart auto-standby that automatically entering deep power saving mode when connected interface is in idle state.   To avoid malicious FW attacks, VL107’s asymmetric secure FW update console has built-in ECDSA256, SHA256, and Random Number Generator to perform secured FW update through ECDSA Verify. Its secure FW update console not only can secured FW update VL107 itself, but also can secured FW update multiple 3rd-party controllers through I2C interface and SPI flash interface. FW image to do ECDSA Verify is performed on VL107’s spare are of SPI flash. Built-in trimmed RC oscillator, linear voltage regulators, Vbus voltage and current detectors, VL107 can work perfectly by Vbus power and monitor abnormal power behavior. Up to 13 GPIO pins are available for specific application usage. The SPI interface can support external SPI flash or sharing SPI flash with VLI Hub controller for firmware upgrade. VL107 is available in QFN 48L (6x6x0.85 mm).

Block Diagram

Key Features

• CC Logic & PD 3.0 Engine
  - Compliant to USB Type-C Cable and Connector Specification Revision 2.0
  - Compliant to USB Power Delivery Sji3pecification Revision 3.0 Version 1.2
  - Integrated Type-C transceivers, supporting one charging UFP and one DRP DFP
  - Built-in pull-up/pull down resistors, including Rp, Rd, and Ra
  - Built-in Vconn power switch
• DP Alt-mode Configuration
  - Compliant to VESA DisplayPort Alt Mode on USB Type-C Standard Version 2.0
  - DP mode Discovery/Enter/Exit; DP configure, status update, source/sink connection detection
  - Built-in AUX CH switch to meet DP Alt-mode AUX channel resistance requirement /li>
• USB-C Charging UFP Capability
  - Charging connected PD hosts once external power is available
  - Support Provider and Consumer roles
  - Support PD Power Rule up to 100W
  - Support dead battery charging and PD3.0 Fast Role Swap
• USB-C DRP DFP Capability
  - Support Provider and Consumer roles
  - Support PD Power Rule up to 100W as Sink and 15W as Source
  - Built-in D+/D- Charging ePHY for chargers using D+/D- as protocol handshake, including QC-to-PD charge-through
• USB Interface and USB Billboard Device
  - USB Billboard compliant to USB Device Class Definition for Billboard Devices Revision 1.21
  - Integrated in-house USB2.0 Full-speed PHY
  - Built-in USB HS data switch; DP_U/DM_U can be directed to USB Billboard or to DP_D/DM_D

• Fast 8051 Macro Cell 80C32-Compatible Microcontroller
  - Standard 1T 8051 instruction set with embedded Mask ROM and SRAM
  - Support external SPI flash or sharing SPI flash with VLI Hub controller for firmware upgrade
• Built-in Asymmetric Secure FW Update Console by ECDSA Verify
  - Built-in ECDSA256, SHA256, and Random Number Generator
  - Secured FW update for VL107 itself and can secured FW update 3rd-party controllers by I2C and SPI interface /li>
• Built-in Buck Oscillator, Voltage Regulators, Voltage and Current Detectors
  - Built-in trimmed RC oscillator
  - Built-in 5V-to-3.3V LDO and 3.3V-to-1.8V LDO
  - Vbus Voltage Detector and Vbus Current Detector for monitoring power safety
• Smart Auto-standby
  - Automatically entering deep power saving mode when connected interface is in idle state
• GPIOs for Special Function and Control
  - 13 GPIOs for application customization and muxed with one I2C Master and one I2C Slave interface
• Physical
  - QFN 48 green package (6x6x0.85 mm)
• Certification
  - USB-IF USB PD 3.0 Certification TID: 4923
• Applications
  - USB-C Video charge through dongle and Multi-function dongle with secure FW update protection