gl852 Genesys Logic, gl852 Datasheet - Page 8

• Manufacturer Part Number: gl852
• Description: Usb 2.0 Mtt Hub Controller
• Manufacturer: Genesys Logic

CHAPTER 2 FEATURES
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©2000-2007 Genesys Logic Inc. - All rights reserved.
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USB specification Revision 2.0
downstream ports
Compliant to USB specification Revision 2.0
On-chip 8-bit micro-processor
Multiple Transaction translator (MTT)
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Each downstream port supports two-color status indicator, with automatic and manual modes compliant to
Support both individual and gang modes of power management and over-current detection for
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:
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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
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
MTT provides respective TT control logics for each downstream port. This is a performance better
choice for USB 2.0 hub.
Stand-alone USB hub
Monitor hub
PC motherboard USB hub, Docking of notebook
Any compound device to support USB HUB function
GL852 USB 2.0 MTT HUB Controller
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