Table of Contents
Advertisement
5.3.2 Connector pin assignment
Connector (cable side): Shielded plug
MOLEX 52316-3611 (shielded cover kit with latches) or equivalent
Figure 5.7 shows the parallel interface connector.
Figure 5.7 Parallel interface connector (IEEE1284-C)
Signal definition:
Table 5.2 lists parallel interface signals and their functions.
Connector
Return
pin
line pin
number
number
1
19
2
20
3
21
5-8
1
19
Table 5.2 Parallel interface signals
Signal
Compati mode
Direction
Nibble mode
Busy
Output
Printer Busy
Select (SLCT)
Output
X Flag
Acknowledge
Output
(ACK)
Printer Clock
18
(Cable side)
(Male type)
36
Description
Data cannot be received when this signal is high,
e.g., if the buffer is full or an error occurs.
Reverse data transfer phase:
Data bit 3, data bit 7, then forward path (host to
printer) busy status
This signal goes high when the printer is selected
(online), and goes low when the printer is deselected
(offline).
Reverse data transfer phase:
Data bit 1, then data bit 5
• Pulse signal indicating data reception completed
(or data reception enabled) status
• Issued when the printer switches from offline to
online
Reverse data transfer phase:
This signal goes high when data being sent to the
host is established.
Reverse idle phase:
This signal is set low then goes high to interrupt the
host, indicating that data is available.
Advertisement
Table of Contents
