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166 Sun Enterprise 220R Server Owner’s Guide • October 1999
11 BUSY Busy Driven high to indicate the
peripheral device is not ready
to receive data during forward
channel transfer. Used to send
Data3 and Data7 during
reverse channel transfer.
12 PERROR Parity Error Driven high by peripheral
device to indicate an error in
the paper path during forward
channel transfer. Used to send
Data2 and Data6 during
reverse channel transfer.
13 SELECT_L Select Low Indicates the peripheral device
is online during forward
channel transfer. Used to send
Data1 and Data5 during
reverse channel transfer.
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 Signal ground Signal ground
19 Signal ground Signal ground
Pin Mnemonic Signal Name Description