Reference For The Parallel Port Connector - Sun Microsystems Sun Enterprise 220R Owner's Manual

Reference for the Parallel Port Connector

The parallel port connector is a DB-25 type connector located on the main logic
board back panel.
Parallel Port Connector Diagram
Parallel Port Signals
Pin Mnemonic
1 Data_Strobe_L
2 to 9 Data[0..7]
10 ACK_L
13
25
Signal Name
Data Strobe Low
Data0 Through
Data7
Acknowledge Low
Appendix A
1
14
Description
Set low during forward
channel transfers to latch data
into peripheral device. Set
high during reverse channel
transfers.
The main data bus for the
parallel port. Data0 is the least
significant bit (LSB). These bits
are not used during reverse
channel transfers.
Driven low by the peripheral
device to acknowledge data
byte transfer from host during
forward channel transfer.
Qualifies data being
transferred to host in reverse
channel transfer.
Connector Signal Descriptions 165