[Genesys-Logic]

FUNCTIONAL OVERVIEW

The GL602USB is an 8-bit RISC-like high performance microcontroller with a built-in 1.5Mbps SIE and transceiver. The microcontroller features 33 instructions optimized for USB keyboard. There are 96 bytes onchip RAM and 4K x 14 bits program ROM incorporated into the micro-controller. The micro-controller features 18 output pins and 8 input pins to make a 18 x 8 key matrix. Additionally, 3 GPIO pins are strong enough to drive LEDs. 4 GPIO pins can be used by any function, for example, support a PS/2 3D mouse to USB 3D mouse converter in the default firmware. Legacy USB cable can be used for keyboard in USB mode. All GPIO ports feature low EMI emissions as a result of improved output drivers with slew-rate control.

FEATURES

• Low-cost solution for low-speed USB keyboard

• 8-bit micro-controller

− Operation Speed: 6MHz clock input

− Performance: 3 MIPS @ 6MHz

− Single cycle instruction execution

− RISC-like architecture

− USB optimized instruction set

• USB Specification Compliance

− Conforms to USB 12Mbps Specification, Version 1.1

− Conforms to USB HID Class Specification, Version 1.1

− Supports 1 device address and 4 endpoints (include endpoint 0)

• I/O ports

− Up to 7(GL602USB)/5(GL602USB-A) general purpose I/O pins (OTP type is less a GPIO pin than mask type).

− Up to 8 sense pins and 1 I/O pin with remote wakeup capability

− Up to 18(GL602USB)/8(GL602USB-A) output pins optimized for key matrix drive pin

− Up to 8(GL602USB)/4(GL602USB-A) output pins optimized for key matrix sense pin

− Up to 3(GL602USB)/1(GL602USB-A) I/O pins with LED drive capability

• Internal memory

− 96 bytes of RAM

− 4K x 14 of program ROM

• On-chip 3.3v output

− No external regulator required

• Improved output drivers with slew-rate control to reduce EMI

• 6 MHz external clock

• Internal power-on reset (POR)

• Internal power-fail detector

• Supports suspend/normal mode power management

− Suspend current lower than 400µA for the whole keyboard system (mask type)

• 8-bit free-running timer

• Available in cost saving 40-pin(GL602USB) PDIP, 24-pin(GL602USB-A) SOP

• Support a PS/2 mouse to USB mouse converter in the default firmware.