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GL852-ONGXX Datasheet(PDF) 8 Page - GENESYS LOGIC |
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GL852-ONGXX Datasheet(HTML) 8 Page - GENESYS LOGIC |
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8 / 31 page  GL852 USB 2.0 MTT HUB Controller ©2000-2007 Genesys Logic Inc. - All rights reserved. Page 8 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 |
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