Interfaces
8-9
Table 8-2 shows all protocol timings in nanoseconds
Printer-to-Computer Communication (Advanced Status)
The printer supports:
•
Compatibility mode
•
Nibble mode
•
Byte mode
•
ECP mode
When a parallel connection exists, the printer also supports a Device ID function.
When queried for its ID, the printer returns the following information:
•
Manufacturer
•
Command set
•
Model of printer
The LEXPARAL.EXE file is available from ftp.lexmark.com as /pub/driver/
technical_brief/LEXPARAL.EXE. Use your web browser to access ftp://
ftp.lexmark.com/pub/driver/technical_brief/LEXPARAL.EXE.
Table 8-2: Fastbytes Timing Sequence
Time
Name
Minimum/Maximum
T1
Data setup to STROBE* low
400 min.
T2
STROBE* low to ACKNLG* low
0
T3
ACKNLG* low to STROBE* high
0
T4
STROBE* high to ACKNLG* high
0
T5
ACKNLG* high and BUSY low to STROBE* low
0
T6
ACKNLG* low to change data
50 min.
T7
STROBE* Timeout
Max based on Auto Strobe Timer
500 min.
T8
ACKNLG* width
Equal to Data Setup Time
400 min.
T9
ACKNLG* to BUSY Skew
+/ - 20 max.
T10
STROBE* high time
Equal to Data Setup Time
400 min.
