Sun Microsystems Ultra 5, Service Manual

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Appendix B Signal Descriptions B-11
13 SELECT_L Indicates the peripheral device is on-
line during forward channel transfer.
Used to send Data1 and Data5 during
reverse channel transfer.
14 AFXN_L 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 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 Driven low by the host to reset
peripheral.
17 PAR_IN_L 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 Signal ground Signal ground
19 Signal ground Signal ground
20 Signal ground Signal ground
21 Signal ground Signal ground
22 Signal ground Signal ground
23 Signal ground Signal ground
24 Signal ground Signal ground
25 Signal ground Signal ground
TABLE B-7
Parallel Port Connector Pin Assignments (Continued)
Pin Signal Description