5

06/19/2000

GL600USB/GL600USB-A/GL600USB-B

Revision 1.3

2

FUNCTIONAL OVERVIEW

The GL600USB is a 8-bits RISC-like high performance microcontroller with a built-in 1.5Mbps SIE and

transceiver. The microcontroller features 33 instructions optimized for USB applications. There are 64

bytes on-chip RAM and 1.75K x 14 program ROM incorporated into the microcontroller. The GL600USB

accepts a 6MHz ceramic resonator or a crystal as its clock source. The microcontroller features 12 general

purpose I/Os (GPIOs). 8 GPIO pins build in 4 bits ADC for photo-sensor input to remove the expensive

process of matching LED and photo-sensor. Additionally, 2 GPIO pins are strong enough to drive LEDs.

All GPIO ports feature low EMI emissions as a result of improved output drivers with slew-rate control.

Micro-

controller

USB Registers

&

FIFO Control

Endpoint 0

8 Bytes FIFO

Endpoint 1

8 Bytes FIFO

USB

Interface

D+

D-

Figure 2-1 Block Diagram of GL600USB