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.
Page 8
GENESYS [ GENESYS LOGIC ]
