Printronix SL5000r RFID Smart Label and Thermal Printers Manuel d'utilisateur télécharger pdf (Page 295)

Centronics Parallel Interface Signals

295

Centronics Parallel Interface Signals

IEEE 1284 Parallel Interface

The IEEE 1284 supports three operating modes, which are determined by

negotiation between the printer and the host.

Compatibility Mode

This mode provides compatibility with Centronics-like host I/O (see Table 11).

Data is transferred from the host to the printer in 8-bit bytes over the data

lines.

Table 12. Centronix Parallel Interface Signals

Signals Purpose

Data Lines 1 through 8 Provide eight standard or inverted levels from

the host that specify character data, plot data,

or a control code. Data Line 8 allows access to

the extended ASCII character set. You may

enable or disable this line via the Data Bit 8

parameter on the Centronics Parallel submenu.

Data Strobe Carries a low true, 100 ns minimum pulse from

the host that clocks data into the printer.

Acknowledge A low true pulse from the printer indicating the

character or function code has been received

and the printer is ready for the next data

transfer.

Online A high true level from the printer to indicate the

printer is ready for data transfer and the PAUSE

key on the control panel has been activated.

When the printer is in online mode, it may

accept data from the host.

Paper Empty (PE) A high true level from the printer to indicate the

printer is in a paper empty or paper jam fault.

Busy A high true level from the printer to indicate the

printer cannot receive data.

Prime A high true level from the host to indicate the

printer should perform a warm start (printer is

reset to the power-up configuration values).

Paper Instruction (PI) Carries a VFU signal from the host with the

same timing and polarity as the data line.

Fault A low true level from the printer indicates a

printer fault.

1 2 ... 290 291 292 293 294 295 296 297 298 299 300 ... 393 394

Pas de commentaire

Printronix SL5000r RFID Smart Label and Thermal Printers Manuel d'utilisateur Page 295