AMT Datasouth Performax - Manual (Page 102)

 Data Transmission:
7 or 8 bit
 Synchronization:
Externally supplied Data Strobe
 Handshaking:
Acknowledge (Busy before Acknowledge or Busy after Acknowledge) Busy (Acknowledge
before Busy or Acknowledge after Busy)
 Logic Level:
Input data and all interface signals are TTL compatible.
Two output signals control the handshaking on the parallel interface, the BUSY signal and
the ACKNOWLEDGE signal. An incoming DATA STROBE will cause BUSY to go high.
PAPEREND: The PAPER END signal is an active high signal that will go high when
paper out is detected.
ERROR: The ERROR signal will go low with the detection of an error condition. A
fatal printer error condition exists when ERROR is low, PAPER END is low
and SELECT is high.
SELECT- When the printer is ready to receive data, the SELECT signal is set high. This
signal will go low when:
The Off Line key is pressed.
There is a carriage jam.
Paper out is detected.
The cover is open.
Fatal errors.
B-1
+ Active high