GL852数据手册Genesys中文资料规格书

特性 Features

● Compliant to USB Specification Revision 2.0\r
− 4 downstream ports\r
− Upstream port supports both high-speed (HS) and full-speed (FS) traffic\r
− Downstream ports support HS, FS, and low-speed (LS) traffic\r
− 1 control pipe (endpoint 0, 64-byte data payload) and 1 interrupt pipe (endpoint 1, 1-byte data payload)\r
− Backward compatible to USB specification Revision 1.1\r
● On-chip 8-bit micro-processor\r
− RISC-like architecture\r
− USB optimized instruction set\r
− Dual cycle instruction execution\r
− Performance: 6 MIPS @ 12MHz\r
− With 64-byte RAM and 2K internal ROM\r
− Support customized PID, VID by reading external EEPROM\r
− Support downstream port configuration by reading external EEPROM\r
● Multiple Transaction translator (MTT)\r
− MTT provides respective TT control logics for each downstream port\r
● Each downstream port supports two-color status indicator, with automatic and manual modes compliant to USB specification Revision 2.0 \r
● Built-in upstream port 1.5KΩ pull-up and downstream port 15KΩ pull-down resistors\r
● 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)\r
● Conform to bus power requirements of USB 2.0 specification\r
● Automatic switching between self-powered and bus-powered modes\r
● Integrate USB 2.0 transceiver\r
● Embedded PLL support external 12 MHz crystal / Oscillator clock input\r
● Support 12MHz clock output (LQFP48 x2, QFN28 x1)\r
● Support compound-device (non-removable in downstream ports) by I/O pin configuration \r
(Not available on QFN 28 package)\r
● Number of Downstream port can be configured by GPIO without external EEPROM \r
(Not available on QFN 28 package)\r
● Operate on 3.3 Volts (Built-in 3.3V to 1.8V regulator)\r
● Improve output drivers with slew-rate control for EMI reduction\r
● Internal power-fail detection for ESD recovery\r
● Available package type: 48-pin LQFP and 28-pin QFN\r
● Applications:\r
− Stand-alone USB hub / USB Docking \r
− UMPC/MID, motherboard on-board applications\r
− Consumer electronics built-in hub application \r
− Monitor built-in hub\r
− Embedded systems\r
− Compound device to support USB hub function such as keyboard hub applications