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HT6550A

Holtek Microelectronics
Part Number HT6550A
Manufacturer Holtek Microelectronics
Description Super I/O Controller
Published Dec 23, 2020
Detailed Description HT6550A Super I/O Controller Features • 100% compatible to IBM PC AT • Fully uPD765b and IBM–BIOS compatible floppy dis...
Datasheet PDF File HT6550A PDF File

HT6550A
HT6550A

Overview
HT6550A Super I/O Controller Features • 100% compatible to IBM PC AT • Fully uPD765b and 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.
44M formats – Support 250Kb/s, 300Kb/s, 500Kb/s data rate • Digital data separator eliminates critical analog adjustments • Two 16450/8250 compatible UARTs – Independent control of transmit,receive,line status and data set interrupts on each channel – Individual modem control signals for each channel – Programmable serial interface characteristics for each channel: Applications • Super (Multi) I/O interface card – # 5-, 6-, 7-, or 8-bit characters – # Even,odd or no parity bit generation and detection – # 1-, 1.
5-, or 2-stop bit generation – Programmable baud rate generator for each channel which allows division of the timing reference clock input by 1 to (216–1) • Only one 24MHz crystal for FDC and UARTs • One IBM PC AT bidirection parallel port for printer • One parallel bus mouse compatible to IBM, Logitech and Zwix Bus Mouse • Support AT full function Game Port • Support AT hard disk IDE interface • Hardware/software configuration setup available • Individual disable feature available • Power saving feature available • 100 pin PQFP package 1 11th Aug ’95 HT6550A General Description The HT6550A 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 interface, standard AT address decoding for on-chip function and four configuration registers in one chip.
It is fabricated with HOLTEK’s high-reliability CMOS technology.
The HT6550A super Multi I/O chip contains one floppy disk controller which supports two floppy drives with capability o...


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