GL850 |
RFQ for GL850 Required Field |
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| Product | Manufacturers | Pack | D/C |
| GL850 | - | 08+ | - |
GL850 is a 4-port standard Universal Serial Bus (USB) hub controller complies with Universal Serial Bus Specification Revision 2.0. GL850 can be connected to an USB1.1 host/hub or an USB2.0 host/hub. When GL850 is connected to an USB1.1 host/hub, it works just like an USB1.1 hub; the upstream port will operate in full-speed (FS) and the downstream port can operate in full-speed or low-speed (LS). When GL850 is connected to an USB2.0 host/hub, it works as an USB2.0 hub; the upstream port will operate in high-speed (HS) and the downstream port can operate in high-speed, full-speed, or low-speed. The bandwidths of high speed, full speed, and low speed are 480 Mbps, 12 Mbps, and 1.5 Mbps respectively.
GL850 embeds an 8-bit RISC processor to manipulate the control/status registers and responds to the requests from USB host. Firmware of GL850 will control its general purpose I/O (GPIO) to access the external EEPROM and then respond to the host the customized PID and VID configured in the external EEPROM.
GL850 responds to the host the default settings in the internal ROM if there exists no external EEPROM. GL850 is designed for customers with much flexibility. Customers can easily design GL850 as 4-port self/bus powered, individual/ganged mode, by setting the I/O pins of GL850 (Ref. to Chapter 5). The more complicated settings such as PID, VID, and number of downstream ports settings are easily achieved by programming the external EEPROM.TT (transaction translator) is the main traffic control engine in an USB2.0 hub to handle the unbalanced traffic speed between the upstream port and the downstream ports. GL850 adopts single TT architecture, which shares the same TT buffer for all downstream devices.
Each downstream port of GL850 supports two-color (green/amber) status LEDs to indicate normal/abnormal status. The downstream ports of GL850 can be configured as individual mode or gang mode (4 ports as a group) for pow
Typical Application |
Features |
| ·Stand-alone USB hub· PC motherboard USB hub, Ducking of notebook· Any compound device to support USB HUB function | • 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 (TT) architecture− Single TT shares the same TT control logics for all downstream port devices. This is the most cost effective solution for TT• 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• Conform to bus power requirements• Automatic switching between self-powered and bus-powered modes• Integrated USB2.0 transceiver• 0.35um CMOS technology• PLL embedded with external 12 MHz crystal• Operate on 3.3 Volts• Improved output drivers with slew-rate control for EMI reduction• Internal power-fail detection for ESD recovery• 64-pin LQFP package |
| Symbol | Parameter | Min. | Max. | Unit |
| VCC | Power Supply | -0.5 | +3.6 | V |
| VIN | Input Voltage | -0.5 | 5 | V |
| VOUT | Output Voltage | -0.5 | +3.6 | V |
| TA | Ambient Temperature under bias | 60 | +100 | |
| FOSC | Frequency | 12 MHz ± 100ppm | ||
| Models | MFG | Pack |
| GL811 | ||
| GL811E | QFP48 | |
| GL811E-04 | ||
| GL811E-04G | ||
| GL811S | ||
| GL811USB | ||
| GL813USB | ||
| GL814 | ||
| GL814-12 | ||
| GL816 | QFP | |
| GL816-12 | ||
| GL816E | ||
| GL817 | ||
| GL817E | ||
| GL817E-07 | ||
| GL817E-09G | ||
| GL818S | ||
| GL819 | ||
| GL841 | ||
| GL841USB | ||
| GL842 | ||
| GL843 | ||
| GL850 | 08+ | |
| GL850-16 | ||
| GL850A | ||
| GL850G | ||
| GL852 | ||
| GL852-02G | ||
| GL852-N | ||
| GL880S | ||
| GL846 | ||
| GL845 | ||
| GL843-3x | ||
| GL842 | ||
| GL830 | ||
| GL828 | ||
| GL827 | ||
| GL826 | ||
| GL824C | ||
| GL824 | ||
| GL819 | ||
| GL817E | ||
| GL816E | ||
| GL816 | ||
| GL813 | ||
| GL811USB | ||
| GL811S | ||
| GL811E | ||
| GL800HT25 | ||
| GL7101 |
