GENERAL DESCRIPTION

Genesys GL3522-22 is a 4-port, low-power, and configurable hub controller. It is compliant with the USB3.0

specification. GL3522-22 integrates Genesys Logic self-developed USB 3.0 Super Speed transmitter/receiver

physical layer (PHY) and USB 2.0 High-Speed PHY. It supports Super Speed, Hi-Speed, and Full-Speed USB

connections and is fully backward compatible to all USB 2.0 and USB 1.1 hosts. GL3522-22 also implements

multiple TT* (Note1) architecture providing dedicated TT* to each downstream (DS) port, which guarantees

Full-Speed(FS) data passing bandwidth when multiple FS devices perform heavy loading operations.

Furthermore, GL3522-22 has built-in 5V to 3.3V and 5V to 1.2V regulators, which saves customers’ BOM cost,

and eases for PCB design.

GL3522-22 features the native fast-charging and complies with USB-IF battery charging specification rev1.2, it

could fast-charge Apple, Samsung Galaxy devices, and any device complaint with BC1.2/1.1. It also allows

portable devices to draw up to 1.5A from GL3522-22 charging downstream ports (CDP1

) or dedicated charging

port (DCP2

). It can enable systems to fast charge handheld devices even during “Sleep” and “Power-off” modes.

FEATURES

 Compliant with USB Specification Revision 3.0

- Upstream port supports super speed(SS) high speed(HS) and full speed(FS) traffic

- Downstream ports support SS, HS, FS, and low speed(LS) traffic

- 1 control pipe and 1 interrupt pipe

- Backward compatible to USB specification Revision 2.0/1.1

 Featuring fast-charging on all downstream ports and upstream port

- Compliant with USB Battery Charging Revision v1.2, supporting CDP, DCP, and ACA-Dock

- Downstream ports can be turned from a Standard Downstream Port (SDP) into Charging Downstream

Port (CDP) or Dedicated Charging Port (DCP)

- Downstream devices can be charged while upstream VBUS is not present, which can be applied on wall

charger applications

- Upstream port is capable of charging and data communicating simultaneously for portable devices

supporting ACA-Dock or proprietary charging protocols, such as Sony Z1 and ZL

- Supporting Apple 2.4A and Samsung Galaxy devices fast-charging

 On-chip 8-bit micro-processor

- RISC-like architecture

- USB optimized instruction set

- 1 cycle instruction execution (maximum)

- Performance: 12 MIPS @ 12MHz (maximum)

- With 256-byte RAM, 20K-byte internal ROM, and 20K-byte SRAM

 Multiple Transaction Translator(TT) architecture

- Providing dedicated TT control logics for each downstream port

- Superior performance when multiple FS devices operate concurrently

 Integrated USB transceiver

- Improving output drivers with slew-rate control for EMI reduction

- Internal power-fail detection for ESD recovery

 Advanced power management and low power consumption

- Supporting USB3.0 U0/U1/U2/U3 power management states

- Supporting USB Link Power Management (LPM) L0/L1/L2

- Supporting individual/gang mode over-current detection for all downstream ports

- Supporting both low/high-enabled power switches

- Patented Smart Power Management

 Configurable settings by SPI-flash/EEPROM/pin strapping

- Configurable charging port

- Configurable 4/3/2 downstream ports

- Configurable Poly-fuse/Power-switch

- Supporting full in-system programming firmware upgrade by SPI-flash and EEPROM

- Supporting compound-device (non-removable setting on downstream ports)

- Supporting customization VID/PID

 Flexible design

- Automatic switching between self-powered and bus-powered modes

- Supporting PHY tuning

- Supporting register setting by firmware

- Supporting vendor command and SMBUS

- Allow downstream ports to connect up to 8 devices, 4 x USB3.0 non-removable devices with 4 x

USB2.0 non-removable devices or exposed ports

 Low BOM cost

- Single external 25 MHz crystal / Oscillator clock input

- Built-in upstream port 1.5KΩ pull-up and downstream port 15KΩ pull-down resistors

- Built-in 5 to 3.3V and 5 to 1.2V regulator

 Available package type

- QFN 76 (9x9mm)

- LGA 76 (9x9mm)

 Applications

- Standalone USB hub/Docking station

- Tablet/Ultrabook/NB

- Motherboard

- Monitor built-in hub, GL3522-22 GPIOs can be programmed as I2C interface to easily update scalar

firmware through USB interface

- TV built-in hub

- Compound device, such as hub-reader application

- USB wall charger

- Other consumer electronics

- Customized applications

 Dynamically disable/enable ports

 GPIO signaling of ambient light sensor or rotation/position sensor