Interface Specifications
RS232 Serial interface
Parallel interface
CAUTION: The
connect the interface cable. See Chapter 3 for instructions on changing SelecType settings.
The printer has the following resident interfaces:
•Parallel
. RS - 232/RS - 422 serial
. A p p l e T a l k
Handshaking
The printer’s serial interface can use DTR (Data Terminal Ready) signal levels and XON/XOFF communication protocols either separately or in combination. When the vacant area for data in the input buffer drops to 128 bytes, the printer outputs an XOFF code or sets the DTR signal level to low (MARK, indicating that it cannot receive any more data).
Once the vacant area for data in the buffer recovers to 256 bytes, the printer outputs an XON code or sets the DTR flag to high (SPACE), indicating that it is again ready to receive data.
Connector
D-sub 25-pin connector
DIN S-pin connector
There are four ways that the printer can be initialized (returned to a fixed set of conditions).
in SelecType Level 2 is executed.
. Software sends the printer-initialize
Parallel interface
Your printer is equipped with an 8-bit parallel interface.
Signal level: TTL compatible
The following tables list the default conditions that become valid when the printer is initialized. The default conditions differ according to the printer mode.
Serial interface
The printer’s resident serial interface can be set for either
Data format |
|
Word length: | 7 or 8 bits |
Parity: | Space or none, odd or even, mark or none |
Stop bits: | 1 or 2 |
Printer ready protocol: enabled (DTR and XON/XOFF protocol set to ON.)
The data format can be set using functions and menu items in SelecType.
Baud rate
RS-232: 300, 600. 1200, 2400, 4800. 9600, 19,200, 38,400 bits per second.
Signal level
RS-232: Conforms to EIA
RS-422: Conforms to EIA
Default settings in HP emulation mode
CR=CR. LF=LF. FF=FF CR=CR, LF=LF. FF=FF
Font ID | 0 | io |
Character | 0 | 0 |
codeI
| 1/7/91 | Laser Printers |