FDC37C665IR Ver la hoja de datos (PDF) - SMSC -> Microchip

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FDC37C665IR

3/5 Volt Advanced High-Performance Multi-Mode™ Parallel Port Super I/O Floppy Disk Controller with Infrared Support

SMSC -> Microchip 

DESCRIPTION OF PIN FUNCTIONS

PIN NO.

NAME

BUFFER

SYMBOL TYPE

DESCRIPTION

75 nError

nERR

I

A low on this input from the printer indicates

that there is a error condition at the printer.

Bit 3 of the Printer Status register reads the

nERR input. Refer to Parallel Port

description for use of this pin in ECP and

EPP mode.

71-68 Port Data

66-63

PD0-PD7

I/OP12 The bi-directional parallel data bus is used

to transfer information between CPU and

peripherals.

100 IOCHRDY

IOCHRDY

OD12P In EPP mode, this pin is pulled low to

extend the read/write command. This pin

has an internal pull-up.

IDE

23 nIDE Low Byte nIDEENLO

Enable

O2 This active low signal is used in both the XT

and AT mode. In the AT mode, this pin is

active when the IDE is enabled and the I/O

address is accessing 1F0H-1F7H and

3F6H-3F7H in primary address mode or

170H-177H and 376H,377H in secondary

address mode. In the XT mode, this signal

is active for accessing 320H-323H, 8 bit

programmed I/O or DMA.

24 nIDE High Byte nIDEENHI

Enable

O2 This signal is active low only in the AT

mode, and when IO16CSB is also active.

The I/O addresses for which this pin reacts

are 1F0H-1F7H in primary address mode or

170H-177H in secondary address mode.

This pin is not used in XT mode.

25 nHard Disk Chip nHDCS0

Select

O12 This is the Hard Disk Chip select

corresponding to addresses 1F0H-1F7H in

primary address mode or 170H-177H in

secondary address mode in the AT mode

and addresses 320H-323H in the XT mode.

26 nHard Disk Chip nHDCS1

Select

O12 This is the Hard Disk Chip select

corresponding to 3F6H,3F7H for primary

address mode or 376H,377H for secondary

address mode in the AT mode and

addresses 3F6H,3F7H in the XT mode.

13

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