HT6551 Datasheet (Holtek Microelectronics)

HT6551, Super I/O Controller

The HT6551 super Multi I/O chip, is an advanced CMOS single chip controller offering the complete I/O solutions for the IBM AT environments.

It incorporates one floppy disk controller (FDC), two full function UARTs, one parallel port, one bus mouse port, one game port controller, IDE hard disk drive

HT6551 Features

* 100% compatible to IBM PC AT/XT

* Fully IBM

* BIOS compatible floppy disk controller

* 48mA floppy drive interface buffers

* Support two floppy drives with capability of supporting up to four drives with an external decoder

* Support 360K/720K/1.2M/1.4