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