Specifications

CHAPTER 1
Overview of LaserWriter Pro Hardware
6
Communication
LocalTalk/RS422 Serial Connector 1
An 8-pin mini-DIN supports LocalTalk and RS-242 devices. Figure 1-3 shows the
connector pin designations for the 8-pin connector, and Table 1-3 lists the pin functions.
Figure 1-3 8-pin mini-DIN connector for LocalTalk and RS-242 devices
Centronics Parallel Connector 1
The LaserWriter Pro 630 provides a 36-pin connector for communication with a standard
Centronics parallel interface. Figure 1-4 shows the pin designations for this connector
and Table 1-4 lists the signal descriptions.
Figure 1-4 Centronics parallel connector
Table 1-3 Signal descriptions for LocalTalk and RS422 serial port
Pin
number Signal name Description
1 HSKo Handshake signal, output
2 HSKi Handshake signal, input
3 /TXD Transmit data (inverted)
4 GND Signal ground
5 /RXD Receive data (inverted)
6 TXD Transmit data
7 GPi General-purpose input
8 RXD Receive data
8 7 6
1
5 4
2
3
Pin 18
Pin 36
Pin 1
Pin 19