W81281 Datasheet PDF | Winbond Electronics Corporation

Winbond Electronics Corporation W81281

W81281 is a low cost, high integration single-chip microcontroller with Universal Serial Bus (USB) interface for keyboard application, it includes the core of Winbond 8-bit microprocessor W78C52 which works on 6MHz. It implements a standard PC keyboard and enables connection to host system through low-speed (1.5Mhz) USB connection . It complies with USB Specification Revision 1.0 and HID Class Definition Revision 1.0.

Part No.	W81281
Datasheet	W81281 Download
Manufacturer	Winbond Electronics Corporation
Description	USB Keyboard/ Device Controller
Buy	Stock & Price

GENERAL DESCRIPTION

For Keyboard application, W81281 supports an 18 X 8 keyboard scan matrix, which allows suspend wake up, and also provides a port for PS/2 mouse. It consists of an 8051 compatible CPU core, a 6K-byte ROM, a 256-byte SRAM, and three 16-bit programmable timers. W81281 supports one device address and five endpoints, one bi-directional endpoint for Control transfer and four unidirectional endpoints for Interrupt IN transfer. Through modification of firmware of W78C52, it can be used for multifunction device design, such as USB-IR receiver and any Slow-Speed (1.5Mhz) USB peripheral device controller. Publication Release Date: July 1999 -1- Revision 0.60 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 wit...