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FDC37C665GT

High-Performance Multi-Mode Parallel Port Super I/O Floppy Disk Controllers

SMSC -> Microchip 

GENERAL DESCRIPTION

The SMSC FDC37C665GT and FDC37C666GT

Advanced High Performance Multi-Mode

Parallel Port Super I/O Floppy Disk Controller

ICs utilize SMSC's proven SuperCell technology

for increased product reliability and functionality.

The FDC37C665GT is optimized for

motherboard applications while the

FDC37C666GT is oriented towards controller

card applications. Both devices support 1 Mb/s

data rates for vertical recording operation. The

FDC37C665GT is hardware compatible with the

FDC37C651 and FDC37C661 in the Standard

and Enhanced Parallel Port Modes.

The FDC37C665GT and FDC37C666GT

incorporate SMSC's true CMOS 765B floppy

disk controller, advanced digital data separator,

16 byte data FIFO, two 16C550 compatible

UARTs, one Multi-Mode parallel port which

includes ChiProtect circuitry plus EPP and ECP

support, IDE interface, on-chip 24 mA AT bus

drivers, game port chip select (FDC37C666GT

only), general purpose address decoder and

four floppy direct drive support. The true CMOS

765B core provides 100% compatibility with IBM

PC/XT and PC/AT architectures in addition to

providing data overflow and underflow

protection. The SMSC advanced digital data

separator incorporates SMSC's patented data

separator technology, allowing for ease of

testing and use. Both on-chip UARTs are

compatible with the NS16C550. The parallel

port,

the

IDE interface and the

game port select logic are compatible with IBM

PC/XT and PC/AT architectures, as well as EPP

and ECP. The FDC37C665GT and

FDC37C666GT incorporate sophisticated power

control circuitry (PCC). The PCC supports

multiple low power down modes.

The FDC37C665GT Floppy Disk Controller

incorporates Software Configurable Logic (SCL)

for ease of use. Use of the SCL feature allows

programmable system configuration of key

functions such as the FDC, parallel port, and

UARTs. The parallel port ChiProtect prevents

damage caused by the printer being powered

when the FDC37C665GT or FDC37C666GT is

not powered. The parallel port backdrive current

protection prevents the FDC37C665GT or

FDC37C666GT from sinking current when the

device is powered off and the printer is left

powered on.

The FDC37C665GT and FDC37C666GT do not

require any external filter components and are,

therefore, easy to use and offer lower system

cost and reduced board area. The

FDC37C665GT and FDC37C666GT are

software and register compatible to the

82077AA using SMSC's proprietary floppy disk

controller core.

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