GL603USB View Datasheet(PDF) - Genesys Logic

Part Name

Description

MFG CO.

GL603USB

USB + PS/2 MOUSE MICROCONTROLLER

Genesys Logic 

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GL603USB/GL603USB-A/GL603USB-B

5 Firmware Programming Guide

5.1 USB Power On Reset and Bus Reset Initialization

Power on reset

USB reset

(Address 0)

Yes

USBPS2 = 1

No

USB reset detected

Wait host controller

to initialize the USB

device

Use (PORT1.5, PORT1.6) to detect

USB or PS/2 mode

Yes

USB mode

detected ?

No

Drive (0, 0) on (PORT1.5, PORT1.6)

about 200 ms

Set (PORT1.5, PORT1.6) to input mode

Set USBPS2 = 1

Wait for USB reset

PS/2 mode is

detected, initialize the

PS/2 device

27

09/22/00

Revision 1.4

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