Service manual

Appendix B Signal Description B-11
B.6 Media Independent Interface Connector
The media independent interface (MII) connector (designated J2501) is located on
the motherboard back panel. The following figure illustrates the MII connector
configuration and the following table lists the MII connector pin assignment.
14 AFXN_L Auto feed low. Set low by the host to
drive the peripheral into auto-line feed
mode during forward channel transfer.
During reverse channel transfer, set
low to indicate host can receive
peripheral device data and then set
high to acknowledge receipt of
peripheral data.
15 ERROR_L Error low. Set low by the peripheral
device to indicate an error during
forward channel transfer. In reverse
channel transfer, set low to indicate
peripheral device has data ready to
send to the host. Used to send Data0
and Data4.
16 INIT_L Initialize low. Driven low by the host
to reset peripheral.
17 PAR_IN_L Peripheral input low. Set low by the
host to select peripheral device for
forward channel transfer. Set high to
indicate bus direction is from
peripheral to host.
18 - 25 Signal Ground Signal ground.
TABLE B-6 Parallel Port Connector Pin Assignments (Continued)
Pin Signal Name Description