HT6550A
HT6550A is Super I/O Controller manufactured by Holtek Microelectronics.
HT6550A Super I/O Controller
Features
- 100% patible to IBM PC AT
- Fully u PD765b and IBM- BIOS patible floppy disk controller
- 48m A 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 patible 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 patible 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
11th Aug ’95
General...
