Epson EPL-N2000 Service Manual page 32

Product Description
BUSY (out)
Compatible mode:
Negotiation phase:
Reverse data transfer
phase:
Reverse idle phase:
ECP mode:
PE (out)
Compatible mode:
Negotiation phase:
Reverse data transfer
phase:
Reverse idle phase:
ECP mode:
Slctout (out)
Compatibility mode:
Negotiation phase:
Reverse data transfer
phase:
Reverse idle phase:
ECP mode:
AutoX (in)
Compatible mode:
Negotiation phase:
Reverse data transfer
phase:
Reverse idle phase:
ECP mode:
1-20
HIGH status indicates the printer is not ready to accept data.
Reflects busy status in forward channel.
Nibble data bit is 3, then 7 in nibble mode.
Reflects busy status in forward channel.
Used for flow control in forward channel.
Also used in reverse mode as the 9th data bit, which indicates
whether signal data information is data or command.
Indicates paper jam or paper empty status in paper tray or cassette.
ERRX goes LOW when PE goes HIGH.
HIGH status indicates whether or not IEEE is supported.
Then, it follows nDataAvail (nFault).
Nibble data bit is 2, then 6 in Nibble mode.
Remains HIGH until the host computer requests data transmission.
Then, it follows nDataAvail (nFault).
Aknowledges nReverseRequest when this signal is set to LOW.
The host computer detects the status as an allowance to drive signal
data.
Always HIGH
Xflag indicates Extensibility flag. It is used in response to
extensibility request value from the host computer.
Nibble data bit is 1, then 5 in nibble mode.
Same as negotiation phase.
Same as negotiation phase.
Not used.
This signal goes HIGH and IEEE 1284 active (nSelectIN) goes LOW
when requesting IEEE 1284 mode. Then it is set to HIGH by setting
PtrClk (nAck) to LOW.
The host computer informs the printer that it is ready to receive data
in nibble mode by setting this signal to LOW. Then sets the signal to
HIGH to inform the printer that data has been received.
This signal goes HIGH in response to a LOW pulse of PtrClk (nAck)
to enter reverse data phase again. Reverse idle phase is returned to
compatibility mode if this signal goes HIGH and IEEE 1284 active
(nselectIn) goes LOW at the same time.
Used for flow control of forward channel. Also used in reverse
mode as the 9th data bit, which indicates whether signal data
information is valid data or command.
EPL-N2000 Service Manual
Rev. A