GL850A-MSGXX データシートの表示（PDF） - Genesys Logic

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GL850A-MSGXX

USB 2.0 Low-Power HUB Controller

Genesys Logic 

GL850A USB 2.0 Low-Power 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

• Single Transaction Translator (STT)

− Single TT shares the same TT control logics for all downstream port devices. This is the most cost

effective solution for TT. Multiple TT provides individual TT control logics for each downstream port.

This is a performance better choice for USB 2.0 hub. Please refer to GL852 datasheet for more

detailed information.

• 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 (64-pin LQFP)

• 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

• 64/48-pin LQFP package

• Applications:

− Stand-alone USB hub

− PC motherboard USB hub, Docking of notebook

− Any compound device to support USB HUB function

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