Lexmark C530DN Technical Reference - Page 331

8-15 Interfaces Parallel Mode 2 Parallel Mode 2 is a feature available for many Lexmark printers. The factory default setting is On. The timing required by the printer is clearly indicated in "Standard Protocol Data Transfer Sequence" on page 8-11. This is the classic Centronics interface timing. By setting Parallel Mode 2 to Off from the printer operator panel, through MarkVision Professional, or through a PJL command, the printer changes when data is valid. Once Parallel Mode 2 is set to Off, the printer takes data from the host computer at the trailing edge of STROBE. This is the last possible host driven transition where data should be valid. If Parallel Mode 2 is Off, the printer automatically turns Advanced Status to Off, eliminating any IEEE 1284 data flow control. Note: You may find this feature helpful when having data transfer reliability problems. Signal Descriptions STROBE Receiver for the Lexmark T640x The following diagram illustrates the STROBE receiver for the Lexmark T640x. Connector Pin GND 74LVC161284 470 ±10%