Terminating Resistor Configurations111nData Available / nPeripheral Request. Driven by the printer. Indicates theprinter has encountered an error. (Data bits 1 and 5 in Nibble mode.)1284 Active / nAStrobe. Driven by the host. A peripheral device is selected.Host Logic High—Driven by the host. When set to high, the host indicates allof its signals are in a valid state. When set to low, the host indicates its poweris off or its signals are in an invalid state.nInit —Resets init interface from the host.Terminating Resistor ConfigurationsV6 Controller BoardFor parallel interface configurations, the printer is equipped with 470 Ohm andand 1K Ohm terminating reistors on the controller board. These are suitablefor most applications. See Figure 24.If the standard terminating resistor pack is not compatible with the particularinterface driver requirements of the host computer, other RP1 and RP2 valuesmay be required. 220 Ohm and 330 Ohm alternate terminating resistors areprovided with the printer. If you install the 220 Ohm resistor, you must alsoinstall the 330 Ohm resistor. Possible terminating resistor combinations areshown below.Configuration RP1 RP2Factory Default 470 Ohm 1K OhmAlternate 220 Ohm 330 Ohm
