Epson C4100 Reference Manual - Page 338
USB Menu, Speed, Buffer Size
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Speed Specifies the pulse width of the ACKNLG signal when receiving data in the Compatibility mode or Nibble mode. When Fast is selected, the pulse width is about 1 µs. When Normal is selected, the pulse width is about 10 µs. Bi-D Allows you to specify the bidirectional communication mode. When you select Off, bidirectional communication is disabled. Buffer Size Determines the amount of memory to be used for receiving data and printing data. If Maximum is selected, more memory is allocated for receiving data. If Minimum is selected, more memory is allocated for printing data. Note: ❏ To activate Buffer Size settings, you must turn off the printer for more than five seconds then turn it back on. Or, you can perform a Reset All operation, as explained in "Reset Menu" on page 336. ❏ Resetting the printer erases all print jobs. Make sure the Ready light is not flashing when you reset the printer. USB Menu These settings control communication between the printer and the computer when using the USB interface. Item USB I/F Buffer Size Settings (default in bold) On, Off Normal, Maximum, Minimum 338 Functions of the Control Panel