GL652USB Datasheet | GENESYS

FEATURES - High performance and low-cost solution for USB hub - USB Specification pliance - .. - - - - - - - - - - - - - - - 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 08/18/00 Revision 1.2 GL652USB 7 PORT USB HUB CONTROLLER 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 u C to encode/decode the host mands. The GL652USB is designed mainly for stand-alone hub and can also be integrated in PC mo therboard or any other devices to support USB hub function. The GL652USB can switch between selfpower and bus-power automatically without re-plug in. The GL652USB can be configured as individual mode or ganged mode for the power management of downstream port devices. To prevent from abnormal current consumption of downstream port devices, the GL652USB supplies power enable flags by reading the over-current flags. The GL652USB supports smart traffic indication through the LED lighting. The higher data traffic flows through one port, the higher frequency of that port’s LED blinks. To minimize...