W81281 View Datasheet(PDF) - Winbond

Part Name

Description

Manufacturer

W81281

USB Keyboard / Device Controller

Winbond 

W81281

Preliminary

2. FEATURES

Fully compliant with USB spec. Rev.1.0 and HID Class Rev. 1.0

Supporting one device address and five endpoints (one Control transfer, four Interrupt transfer)

Implementing USB keyboard with PS/2 mouse connection

Microsoft Intellimouse(3D mouse) Supported

Supporting 8-bit sense (row) input with wake up interrupt on falling edge, internal pull-ups

Supporting 18-bit drive (column) output, open drain with pull-ups

8-bit 8051 compatible CPU core

6K-byte ROM

256-byte SRAM

3 direct drive LED outputs with internal series resisters

Supporting warm reset

Built-in low voltage reset and EFT/ESD protection circuit

Built-in Watch-Dog Timer for device recovery

Support Win98 system control function

Support suspend/wake-up function, suspend current under 500µA

Internal 3.3V regulator supported

40-pin DIP, 28-pin SOP and 48-pin LQFP packages

5V CMOS Device

2

Publication Release Date: July 1999

Revision 0.60

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