FDC37C666GT(1994) Ver la hoja de datos (PDF) - SMSC -> Microchip

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FDC37C666GT
(Rev.:1994)

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

SMSC -> Microchip 

PIN NO.

NAME

73 nPrinter Select

Input

74 nInitiate Output

76 nAutofeed

Output

77 nStrobe Output

61 Busy

62 nAcknowledge

DESCRIPTION OF PIN FUNCTIONS

BUFFER

SYMBOL TYPE

DESCRIPTION

nSLCTIN

OD24

This active low output selects the printer.

This is the complement of bit 3 of the Printer

Control Register.

0P24 Refer to Parallel Port description for use of

this pin in ECP and EPP mode.

nINIT

OD24

This output is bit 2 of the printer control

register. This is used to initiate the printer

when low.

0P24 Refer to Parallel Port description for use of

this pin in ECP and EPP mode.

nAUTOFD

OD24

This output goes low to cause the printer to

automatically feed one line after each line is

printed. The nAUTOFD output is the

complement of bit 1 of the Printer Control

Register.

0P24 Refer to Parallel Port description for use of

this pin in ECP and EPP mode.

nSTROBE

OD24

An active low pulse on this output is used to

strobe the printer data into the printer. The

nSTROBE output is the complement of bit 0

of the Printer Control Register.

0P24 Refer to Parallel Port description for use of

this pin in ECP and EPP mode.

BUSY

I

This is a status output from the printer, a

high indicating that the printer is not ready

to receive new data. Bit 7 of the Printer

Status Register is the complement of the

BUSY input. Refer to Parallel Port

description for use of this pin in ECP and

EPP mode.

nACK

I

A low active output from the printer

indicating that it has received the data and

is ready to accept new data. Bit 6 of the

Printer Status Register reads the nACK

input. Refer to Parallel Port description for

use of this pin in ECP and EPP mode.

14

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