LPC61W492 Ver la hoja de datos (PDF) - SMSC -> Microchip

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LPC61W492

Integrated Super I/O Controller for LPC Bus with Game and MIDI Ports/Plus Hardware Monitoring Functions

SMSC -> Microchip 

- Issue nSMI, IRQ, nOVT to Activate

System Protection

- Intel LDCMTM/Acer ADMTM

Compatible

GENERAL DESCRIPTION

The LPC61W492 is an evolving product from

SMSC's most popular I/O family. It features a

whole new interface, namely LPC (Low Pin

Count) interface, which will be supported in the

next generation Intel chip-set. This interface as

its name suggests is to provide an economical

implementation of I/O's interface with lower pin

count and still maintains equivalent performance

as its ISA interface counterpart. Approximately

40 pin counts are saved in LPC I/O comparing to

ISA implementation. With this additional

freedom, we can implement more devices on a

single chip as demonstrated in LPC61W492's

integration of Game Port and MIDI Port. It is fully

transparent in terms of software which means no

BIOS or device driver update is needed except

chip-specific configuration.

The disk drive adapter functions of LPC61W492

include a floppy disk drive controller compatible

with the industry standard 82077/765, data

separator, write pre-compensation circuit,

decode logic, data rate selection, clock

generator, drive interface control logic, and

interrupt and DMA logic. The wide range of

functions integrated onto the LPC61W492

greatly reduces the number of components

required for interfacing with floppy disk drives.

The LPC61W492 supports four 360K, 720K,

1.2M, 1.44M, or 2.88M disk drives and data

transfer rates of 250 Kb/s, 300 Kb/s, 500 Kb/s, 1

Mb/s, and 2 Mb/s.

The LPC61W492 provides two high-speed serial

communication 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 up to 115.2k bps and also

advanced speed with baud rates of 230k, 460k,

or 921kbps which support higher speed

modems. In addition, the LPC61W492 provides

IR functions: IrDA 1.0 (SIR for 1.152K bps) and

TV remote IR (Consumer IR, supporting NEC,

RC-5, extended RC-5, and RECS-80 protocols).

The LPC61W492 supports one PC-compatible

printer port (SPP), Bi-directional Printer port

(BPP) and also Enhanced Parallel Port (EPP)

and Extended Capabilities Port (ECP). Through

the printer port interface pins, also available are:

Extension FDD Mode and Extension 2FDD

Mode allowing one or two external floppy disk

drives to be connected.

The configuration registers support mode

selection, function enable/disable, and power

down function selection. Furthermore, the

configurable PnP features are compatible with

the plug-and-play feature demand of Windows

95/98™, which makes system resource

allocation more efficient than ever.

The LPC61W492 provides functions that

complies with ACPI (Advanced Configuration

and Power Interface), which includes support of

legacy and ACPI power management through

nPME or nPSOUT function pins. For OnNow

keyboard Wake-Up, OnNow mouse Wake-Up,

and OnNow CIR Wake-Up. The LPC61W492

also has auto power management to reduce the

power consumption.

The keyboard controller is based on 8042

compatible instruction set with a 2K Byte

programmable ROM and a 256-Byte RAM bank.

Keyboard BIOS firmware are available with

3

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