FUNCTION OVERVIEW
The GL652USB is an 8 port USB hub with 1 upstream port and 7 downstream ports. It uses an 8-bit RISC-like uC to encode/decode the host commands.
   
FEATURES
• High performance and low-cost solution for USB hub
• USB Specification Compliance
    - Conforms to USB specification Rev. 1.1
    - Supports 1 device address and 2 endpoints
• 8-bit micro-processor
    - RISC-like architecture
    - USB optimized instruction set
    - Single cycle instruction execution
    - Operation Speed: DC to 24 MHz clock input
    - Performance: 12 MIPS @ 24MHz
• I/O ports
    - 7-port hub
• Internal memory
    - 64 bytes of RAM
    - 1.75K ´ 14 of program ROM
• On-chip 3.3v output
    - No external regulator required
• Integrated USB transceiver
• 12 MHz external clock
• Improved output drivers with slew-rate control to reduce EMI
• Internal power-on reset(POR)
• Internal power-fail detector for ESD recovery
• Support suspend/normal mode power management
• Support power management for downstream port devices
• Automatic switching between self/bus powered mode
• Smart LED traffic indicator
    - The higher data traffic flows through one port,
        the higher frequency that port’s
        LED will blink.
• Applications:
    - Stand-alone USB hub
    - PC motherboard USB hub
• 48 pin LQFP package