FDC37C669 datasheet(13/164 Pages) SMSC

Nome de Peças	FDC37C669

Descrição Electrónicos	PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support

PDF	164 Pages

Scroll/Zoom	100%

Fabricante Electrônico	SMSC [SMSC Corporation]

Página de início	http://www.smsc.com

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13 / 164 page

DESCRIPTION OF PIN FUNCTIONS

QFP/

TQFP

PIN NO.

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

63-66

68-71

Port Data

PD0-PD7

I/O24

The bi-directional parallel data bus is used

to transfer information between CPU and

peripherals.

100

IOCHRDY

OD24P

In EPP mode, this pin is pulled low to

extend the read/write command. This pin

has an internal pull-up.

IDE/ALT IR PINS

nIDE Enable

Interrupt

Request H

nIDEEN

IRQ_H

O24P

(Note 1)

024

OD24

This active low signal is active when the IDE

is enabled and the I/O address is accessing

an IDE register.

The interrupt request from a logical device

or IRQIN may be output on the IRQH signal.

Refer to the configuration registers for more

information.

If EPP or ECP Mode is enabled, this output

is pulsed low, then released to allow sharing

of interrupts.

nIDE Chip

Select 0

IRRX2

nHDCS0

IRRX2

O24P

(Note 1)

This

the

Hard

Disk

Chip

select

corresponding to the eight control block

addresses.

Alternate IR Receive input

nIDE Chip

Select 1

IR Transmit 2

nHDCS1

IRTX2

O24P

(Note 1)

O24P

This

the

Hard

Disk

Chip

select

corresponding

the

alternate

status

Alternate IR transmit output

MISCELLANEOUS

CLOCK 14

CLK14

ICLK

The external connection to a single source

14.318 MHz clock.

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