Canon MP 1000 User Manual download pdf (Page 239)

Appendix A Specifications A-7

When you use the MultiPASS 1000 as a normal printer, each signal

is defined as follows:

STROBE

When the MultiPASS 1000 receives the STROBE low pulse with a

width greater than 1 µs from the computer, it reads the data from

the interface and sets the BUSY line high.

DATA

These signals are the 8 bits of parallel data sent from the computer.

A high level indicates a logical 1; a low level indicates a logical 0.

The MultiPASS 1000 reads the DATA lines when it receives a

STROBE pulse.

ACKNLG

The ACKNLG pulse tells the computer that the MultiPASS 1000

has read the data from the previous STROBE pulse. An ACKNLG

pulse is also generated when the MultiPASS 1000 is powered on or

at the completion of the MultiPASS 1000 initialization by an INIT

signal requested from the computer.

BUSY

When the MultiPASS 1000 sets BUSY high it cannot receive data.

The BUSY line goes high in response to a STROBE pulse. This line

remains high until the data is read. BUSY is also high under the

following conditions:

❏ The receive buffer is full of data.

❏ The MultiPASS 1000 receives an INIT signal.

❏ You press the ON LINE button to set the MultiPASS 1000

printer off-line.

❏ An error condition, such as out-of-paper, occurs.

PAPER END

The MultiPASS 1000 sets PAPER END high when it is out of paper

or when a paper jam occurs. PAPER END remains high until you

load paper and press the ON LINE button.

SELECT

When the MultiPASS 1000 is ready, it sets the SELECT line high.

The SELECT line goes low when:

❏ You press the ON LINE button to set the MultiPASS 1000

printer off-line.

❏ An error condition, such as out-of-paper, occurs.

❏ The MultiPASS 1000 receives the Printer Deselect command. It

ignores all incoming data except DC1, which returns it to a

selected state.

Specifications

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Canon MP 1000 User Manual Page 239