Printronix MVP Series user manual Centronics Interface, Centronics Connector

Centronics Interface

The Centronics (standard) interface transfers parallel data bytes at a rate of up to 200,000 characters per second. The interface requires an I/O cable assembly with an Amphenol compatible connector (Printronix P/N

110376–001) as shown in Figure 8–1, connected to the properly terminated Parallel Controller PCBA at P4. Configuration Option 66 must be set to 66.0

Figure 8–1. Centronics Connector

Figure 8–2 illustrates the Centronics interface timing sequence. Data transfer is initiated when the host computer places a data byte on the data lines. After a delay of at least 50 ns, the host computer issues DATA STROBE to latch the data byte into the receiver latches. DATA STROBE must be at least 100 ns in duration. Normally, the printer responds with a 4 ∝s ACKNOWLEDGE pulse and BUSY. If Configuration Option 65.1 is selected, BUSY will be suppressed until the host computer sends a line terminator control code byte (FF, LF, or EVFU). Table 8–1 describes the Centronics interface signals and pin assignments and Table 8–2 describes the Dataproducts interface signals and pin assignments.

Figure 8–2. Centronics Interface Timing Sequence

Interfaces 8–3