SC2200 datasheet(71/433 Pages) NSC

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Signal Definitions (Continued)

2.4.12 Parallel Port Interface Signals

Signal Name

Ball No.

Type

Description

Mux

EBGA

TEPBGA

ACK#

B18

Acknowledge. Pulsed low by the printer to

indicate that it has received data from the Par-

allel Port.

TFTDE+FPCICLK

AFD#/DSTRB#

AB2

D22

Automatic Feed. When low, instructs the

printer to automatically feed a line after print-

ing each line. This signal is in TRI-STATE

after a 0 is loaded into the corresponding

control register bit. An external 4.7 K

Ω pull-

up resistor should be attached to this ball.

Data Strobe (EPP). Active low, used in EPP

mode to denote a data cycle. When the cycle

is aborted, DSTRB# becomes inactive (high).

TFTD2+INTR_O

BUSY/WAIT#

B17

Busy. Set high by the printer when it cannot

accept another character.

Wait. In EPP mode, the Parallel Port device

uses this active low signal to extend its

access cycle.

TFTD3+F_C/BE1#

ERR#

AA3

D21

Error. Set active low by the printer when it

detects an error.

TFTD4+F_C/BE0#

INIT#

B21

Initialize. When low, initializes the printer.

This signal is in TRI-STATE after a 1 is

loaded into the corresponding control register

bit. Use an external 4.7 K

Ω pull-up resistor.

TFTD5+SMI_O

PD7

A18

I/O

Parallel Port Data. Transfer data to and from

the peripheral data bus and the appropriate

Parallel Port data register. These signals

have a high current drive capability.

TFTD13+F_AD7

PD6

A20

TFTD1+F_AD6

PD5

C19

TFTD11+F_AD5

PD4

C18

TFTD10+F_AD4

PD3

C20

TFTD9+F_AD3

PD2

D20

TFTD8+F_AD2

PD1

A21

TFTD7+F_AD1

PD0

AA1

C21

TFTD6+F_AD0

D17

Paper End. Set high by the printer when it is

out of paper.

This ball has an internal weak pull-up or pull-

down resistor that is programmed by soft-

ware.

TFTD14+F_C/BE2#

SLCT

C17

Select. Set active high by the printer when

the printer is selected.

TFTD15+F_C/BE3#

SLIN#/ASTRB#

B20

Select Input. When low, selects the printer.

This signal is in TRI-STATE after a 0 is

loaded into the corresponding control register

bit. Uses an external 4.7 K

Ω pull-up resistor.

Address Strobe (EPP). Active low, used in

EPP mode to denote an address or data

cycle. When the cycle is aborted, ASTRB#

becomes inactive (high).

TFTD16+

F_IRDY#

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