Revision 1.1

Jun. 7, 1999

-3-

GL640USB, GL640USB-A

2. 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.

3

CLK12/48

3.3V output

EPP

DEVICE

ASIC

GL640USB

GPIO1-7

INIT#

WR#

WAIT#

ASTRB#

DSTRB#

AD[7:0]

INT#

CLKOUT

HRST

USB Port

D+

D-

VCP

OSCSEL

GPI1-4