Description
The GL640USB is a low-cost, single-chip embedded controller designed for connecting an IEEE 1284 parallel port peripheral to USB. It is suitable for applications where the IC is mounted on a PCB inside a product or stand-alone applications where the chip resides in a cable connecting a standard parallel port device to an USB-capable computer. The GL640USB firmware/driver will allow peripheral vendors to easily migrate parallel port device to USB.

FEATUREs
➤ Low-cost solution for full-speed USB device
➤ Applications – Printer, Scanner, PC Camera, External Storage Device, CD-ROM
➤ IEEE 1284 interface supports bi-directional communication
➤ On-chip EPP engine
➤ On-chip 8-bit micro-controller
➤ USB Specification Compliance
   - Conforms to USB 12Mbps Specification, Version 1.0
   - Supports 1 device address and 4 endpoints
➤ 2 sets of 64-byte FIFO with dynamic allocation
   - a. 64-In/64-Out
   - b. 64-In0/64-In1 ping pong buffer
   - c. 64-Out0/64-Out1 ping pong buffer
➤ Integrated USB transceiver
➤ On-chip 3.3v regulator
➤ Improved output drivers with slew-rate control to reduce EMI
➤ 12MHz external clock
➤ On-chip PLL to support 48MHz internal clock
➤ Internal power-on reset(POR)
➤ Supports suspend/normal mode power management
➤ Customized firmware/driver for scanner application
➤ The driver allows current Win98/Win95 OSR-2 printer drivers to print seamlessly to USB
➤ Fully plug & play compatible
➤ Single-chip solution in cost saving 40-pin SOJ(GL640USB) / 48-pin LQFP(GL640USB-A)
➤ Special pad-design to support EPP/USB dual-interface application