Lexmark X940E - Printer-To-Computer Communication (Advanced Status)

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.