Canon BJC 6000 - Color Inkjet Printer Service Manual page 42

Part 2: Product Specifications
8) I/O signals
Compatible Mode:
STROBE (Input)
This signal asks the printer to read Data 1 to Data 8. This signal becomes valid
after the BUSY signal goes "L" and the printer outputs ACKNLG. This signal is
normally "H," and the printer receives data after this signal goes "L." This signal
must be turned "H" before the printer can start printing.
Data 1-8 (Input)
The printer receives data in synchronization with STROBE. Each bit of data must
be maintained for at least 0.5 µs after the rising edge of STROBE.
ACKNLG (Output)
This signal is returned in response to STROBE. The host computer can output
another STROBE only after this signal is returned to the host computer. This
signal is output regardless of STROBE when the printer is powered up or when
BUSY goes "L" in response to the INIT signal input from the host computer.
BUSY (Output)
The printer is BUSY when this signal is "H," and READY when this signal is "L."
This signal goes "H" when the printer is receiving data or detects an error (paper
out, paper jam, etc.).
P.E. (Output)
This signal goes "H" if the paper feeding operation of the printer fails to feed paper.
As this signal goes "H," BUSY goes "H," and SELECT and ERROR go "L." This
signal goes "L" when paper is set and fed. At this time both ERROR and SELECT
go "H." If the paper eject operation fails to eject paper (paper jam), this signal also
goes "H," BUSY goes "H," SELECT goes "L," and ERROR goes "L." Simply removing
jammed paper from the printer does not automatically reset this signal.
SELECT (Output)
The printer makes this signal "H" when it is READY. If an error occurs (paper out,
paper jam, etc.), this signal goes "L."
AUTO FEED XT (Input)
When this signal is "L," the printer is set to the automatic line feed mode
(CR=CR+LF). The printer reads this signal only at the time of power-up or
initialization in response to the INIT signal.
INIT (Input)
When this signal goes "L," the printer is forced to BUSY, and this signal's "L"-to-"H"
edge resets the printer. The pulse width of this signal must be at least 50 µs as
measured at the printer. After the initializing process, the printer moves its
carriage to the home position, enters the 10 cpi mode, and is set in the condition
specified by the function settings.
ERROR (Output)
When the printer detects an error (paper out, paper jam, etc.), this signal goes "L"
to notify the host computer that the printer is in error.
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BJC-6000