GL852中文资料USB 2.0 MTT HUB Controller数据手册Genesys规格书

特性 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
● Each downstream port supports two-color status indicator, with automatic and manual modes compliant to USB specification Revision 2.0
● Built-in upstream port 1.5KΩ pull-up and downstream port 15KΩ pull-down resistors
● Support both individual and gang modes of power management and over-current detection for downstream ports (For LQFP48 only, individual mode not available on QFN28 package)
● Conform to bus power requirements of USB 2.0 specification
● Automatic switching between self-powered and bus-powered modes
● Integrate USB 2.0 transceiver
● Embedded PLL support external 12 MHz crystal / Oscillator clock input
● Support 12MHz clock output (LQFP48 x2, QFN28 x1)
● Support compound-device (non-removable in downstream ports) by I/O pin configuration
(Not available on QFN 28 package)
● Number of Downstream port can be configured by GPIO without external EEPROM
(Not available on QFN 28 package)
● Operate on 3.3 Volts (Built-in 3.3V to 1.8V regulator)
● Improve output drivers with slew-rate control for EMI reduction
● Internal power-fail detection for ESD recovery
● Available package type: 48-pin LQFP and 28-pin QFN
● Applications:
− Stand-alone USB hub / USB Docking
− UMPC/MID, motherboard on-board applications
− Consumer electronics built-in hub application
− Monitor built-in hub
− Embedded systems
− Compound device to support USB hub function such as keyboard hub applications