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SUPER P3TDDR User's Manual
1-14
1-6 Super I/O
The functions of the disk drive adapter for the Super I/O chip include a
floppy disk drive controller that is compatible with industry standard 82077/
765, a data separator, write pre-compensation circuitry, decode logic, data
rate selection, a clock generator, drive interface control logic and interrupt
and DMA logic. The wide range of functions integrated onto the Super I/O
greatly reduces the number of components required for interfacing with
floppy disk drives. The Super I/O supports four 360 K, 720 K, 1.2 M, 1.44
M or 2.88 M disk drives and data transfer rates of 250 Kb/s, 500 Kb/s or 1
Mb/s. It also provides two high-speed, 16550 compatible serial communica-
tion ports (UARTs), one of which supports serial infrared communication.
Each UART includes a 16-byte send/receive FIFO, a programmable baud
rate generator, complete modem control capability and a processor interrupt
system. Both UARTs provide legacy speed with baud rate of up to 115.2
Kbps as well as an advanced speed with baud rates of 250 K, 500 K, or 1
Mb/s, which support higher speed modems.
At any given time, the Super I/O supports one of the followinga : PC-com-
patible printer port (SPP), Bi-directional Printer Port (BPP), Enhanced Parallel
Port (EPP) or Extended Capabilities Port (ECP).
The Super I/O provides functions that comply with ACPI (Advanced Con-
figuration and Power Interface), which includes support of legacy and ACPI
power management through an SMI or SCI function pin. It also features
auto power management to reduce power consumption.
The IRQs, DMAs and I/O space resources of the Super I/O can flexibly
adjust to meet ISA PnP requirements, which suppport ACPI and APM (Ad-
vanced Power Management).