GL852 View Datasheet(PDF) - GENESYS LOGIC
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GL852 Datasheet PDF : 31 Pages
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GL852 USB 2.0 MTT HUB Controller
CHAPTER 2 FEATURES
• Compliant to USB specification Revision 2.0
− 4 downstream ports
− Upstream port supports both high-speed (HS) and full-speed (FS) traffic
− Downstream ports support HS, FS, and low-speed (LS) traffic
− 1 control pipe (endpoint 0, 64-byte data payload) and 1 interrupt pipe (endpoint 1, 1-byte data payload)
− Backward compatible to USB specification Revision 1.1
• On-chip 8-bit micro-processor
− RISC-like architecture
− USB optimized instruction set
− Dual cycle instruction execution
− Performance: 6 MIPS @ 12MHz
− With 64-byte RAM and 2K internal ROM
− Support customized PID, VID by reading external EEPROM
− Support downstream port configuration by reading external EEPROM
• Multiple Transaction translator (MTT)
− MTT provides respective TT control logics for each downstream port. This is a performance better
choice for USB 2.0 hub.
• 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
• Support gang mode of power management and over-current detection for downstream ports
• Conform to bus power requirements
• Automatic switching between self-powered and bus-powered modes
• Integrate USB 2.0 transceiver
• PLL embedded with external 12 MHz crystal
• Operate on 3.3 Volts
• Embed serial resister for USB signals and integrate pull-up resister for upstream USB signal
• Improve output drivers with slew-rate control for EMI reduction
• Internal power-fail detection for ESD recovery
• 64-pin LQFP package , 48-pin LQFP package , 48-pin QFN package
• Applications:
− Stand-alone USB hub
− Monitor hub
− PC motherboard USB hub, Docking of notebook
− Any compound device to support USB HUB function
©2000-2007 Genesys Logic Inc. - All rights reserved.
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