Anadex DP-9000 User Manual

DSTR
INPUT
ACK
OUTPUT
BUSY
OUTPUT
IBZ
OUTPUT
INPUT PRIME
INPUT
-
DATA STROBE - This input signal is used to
indicate data is on the bus. This signal
is normally active low, but a jumper is pro-
vided to invert the signal. Data should be
on the bus for at least 300 nanoseconds
before the strobe. Strobe duration minimally
should be 0.5 microseconds.
ACKNOWLEDGE - This is nominally a 4 micro-
seconds active low pulse indicating that the
data has been received and processed and the
prihter is ready for the next data strobe.
The ACK pulse will occur within 1 millisecond
after the DSTR. An ACK pulse is also trans-
mitted immediately following power up initiali-
zation. If the last character receLved fills
the FIFO buffer, then the ACK pulse is delayed
until after the buffer is again available~
- This signal is available but not normally used
but can be activated at J3-ll by relocating a
jumper. This signal is an active high signal.
On power-up, BUSY is high and goes low when
initialization is complete and the printer goes
ON LINE. (See the ON-LINE discussion below.)
A high BUSY signal indicates the printer is
unable to accept any more data. BUSY goes high
upon receipt of the DSTR for the character
which fills the FIFO buffer, after the DSTR
following the printer sensing an Out~of-Paper
condi tion, when the printer is placed OFF' 'LINE,
or immediately upon receipt of an INPUT PRIME
signal (RESET). BUSY goes low on the true con-
dition of paper inserted, ON LINE (not RESET),
and buffer space available.
- INPUT BUSY - This signal combines the character-
istics of both ACK and BUSY, and is an active
high signal. IBZ goes low simultaneously with
ACK and remains low until 2 microseconds after
DSTR. IBZ then remains high until the next ACK~
This is the appropriate signal for those I/O
systems monitoring only one printer status line.
- This signal is effectively a reset signal and
is active low. When this input is driven low
by the data source, the printer microprocessor
and the associated logic circuits are forced to
the reset condition. When the input is again
allowed to go high, the printer is reinitialized~
2·-12

Anadex DP-9000 Specifications

General

Brand	Anadex
Model	DP-9000
Category	Printer
Language	English