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GL850 Datasheet, PDF (10/40 Pages) List of Unclassifed Manufacturers – USB 2.0 4-PORT HUB Controller | |||
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GL850 USB 2.0 4-Port HUB Controller
CHAPTER 2 FEATURES
⢠Compliant to USB specification Revision 2.0
â 4 downstream ports
â Upstream port supports both high-speed (HS) and full-speed (FS) traffic
â Downstream ports support HS, FS, and low-speed (LS) traffic
â 1 control pipe (endpoint 0, 64-byte data payload) and 1 interrupt pipe (endpoint 1, 1-byte data
payload)
â Backward compatible to USB specification Revision 1.1
⢠On-chip 8-bit micro-processor
â RISC-like architecture
â USB optimized instruction set
â Dual cycle instruction execution
â Performance: 6 MIPS @ 12MHz
â With 64-byte RAM and 2K internal ROM
â Support customized PID, VID by reading external EEPROM
â Support downstream port configuration by reading external EEPROM
⢠Single Transaction Translator (TT) architecture
â Single TT shares the same TT control logics for all downstream port devices. This is the most cost
effective solution for TT
⢠Each downstream port supports two-color status indicator, with automatic and manual modes compliant to
USB specification Revision 2.0
⢠Support both individual and gang modes of power management and over-current detection for
downstream ports
⢠Conform to bus power requirements
⢠Automatic switching between self-powered and bus-powered modes
⢠Integrated USB2.0 transceiver
⢠0.35um CMOS technology
⢠PLL embedded with external 12 MHz crystal
⢠Operate on 3.3 Volts
⢠Improved output drivers with slew-rate control for EMI reduction
⢠Internal power-fail detection for ESD recovery
⢠64-pin LQFP package
⢠Applications:
â Stand-alone USB hub
â PC motherboard USB hub, Ducking of notebook
â Any compound device to support USB HUB function
©2000-2003 Genesys Logic Inc.âAll rights reserved.
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