Appendix A Specifications A-7When you use the MultiPASS 1000 as a normal printer, each signalis defined as follows:STROBEWhen the MultiPASS 1000 receives the STROBE low pulse with awidth greater than 1 μs from the computer, it reads the data fromthe interface and sets the BUSY line high.DATAThese 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 aSTROBE pulse.ACKNLGThe ACKNLG pulse tells the computer that the MultiPASS 1000has read the data from the previous STROBE pulse. An ACKNLGpulse is also generated when the MultiPASS 1000 is powered on orat the completion of the MultiPASS 1000 initialization by an INITsignal requested from the computer.BUSYWhen the MultiPASS 1000 sets BUSY high it cannot receive data.The BUSY line goes high in response to a STROBE pulse. This lineremains high until the data is read. BUSY is also high under thefollowing conditions:o The receive buffer is full of data.o The MultiPASS 1000 receives an INIT signal.o You press the ON LINE button to set the MultiPASS 1000printer off-line.o An error condition, such as out-of-paper, occurs.PAPER ENDThe MultiPASS 1000 sets PAPER END high when it is out of paperor when a paper jam occurs. PAPER END remains high until youload paper and press the ON LINE button.SELECTWhen the MultiPASS 1000 is ready, it sets the SELECT line high.The SELECT line goes low when:o You press the ON LINE button to set the MultiPASS 1000printer off-line.o An error condition, such as out-of-paper, occurs.o The MultiPASS 1000 receives the Printer Deselect command. Itignores all incoming data except DC1, which returns it to aselected state.Specifications
