GENERAL DESCRIPTION
The GL811S is a highly-compatible, low cost USB 2.0to ATA / ATAPI bridge controller, which integrates Genesys Logic own design high speed UTMI (USB 2.0 Transceiver Macrocell Interface) transceiver.
As a one-chip solution which complies with Universal Serial Bus specification rev. 2.0 and ATA / ATAPI-6 specification rev 1.0, the GL811S can support various kinds of ATA / ATAPI device. There are totally 4 endpoints in the GL811S controller, Control (0), Bulk In (1), Bulk Out (2), and Interrupt (3). By complies with the USB Storage Class specification ver.1.0 (Bulk only protocol), the GL811S can support not only plugand play but also Windows XP/ 2000/ ME default driver.
The GL811S uses 12MHz crystal and slew-rate controlled pads to reduce the EMI issue. With 48-pin LQFP (7mmX7mm) package, the GL811S is the best cost/ performance solution to fit different situations in the USB 2.0 high speed storage class applications such as Hard Disk, CD-ROM, CD-R / RW and DVD-ROM.

FEATURES 
· Complies with Universal Serial Bus specification rev. 2.0.
· Complies with ATA/ATAPI-6 specification rev 1.0.
· Complies with USB Storage Class specification ver.1.0. (Bulk only protocol)
· Operating system supported: Win XP / 2000 / Me / 98 / 98SE; Mac OS 9.X / 10.X.
· Integrated USB 2.0 Transceiver Macrocell Interface (UTMI) transceiver and Serial Interface Engine (SIE).
· Support 4 endpoints: Control (0) / Bulk Read (1) / Bulk Write (2) / Interrupt (3).
· 64 / 512 bytes Data Payload for full / high speedBulk Endpoint.
· Support 16-bit Multiword DMA mode and Ultra DMA mode interface (Ultra 33 / 66).
· Embedded Turbo 8051.
· ROM size: 12k words; RAM size: 1280 bytes. (Bulk Buffer: 512 words, MC RAM: 256 bytes)
· Supports Power Down mode and USB suspend indicator.
· Supports USB 2.0 TEST mode features.
· Supports 4 GPIOs for programmable AP (48 pin package).
· Supports 8 GPIOs for programmable AP (64 pin package).
· Supports device power control for power on/off when running suspend mode.
· Supports 32 bit and 48 bit LBA hard disk.
· Provides LED indicator for Full Speed and High Speed (only for 64 pin package).
· Using 12 MHz external clock to provide better EMI.
· 3.3V I/Os (5V tolerant) 5V tolerance pad for IDE interface.
· Operates at 5V voltage (built-in 5V to 3.3V & 3.3V to 1.8V regulator)
· Supports Wakeup ability.
· Available in 48-pin/64-pin LQFP package types.
· Provides SPI interface (only for 64 pin package).
· Provides UART interface (only for 64 pin package).