Star Micronics SP298 user manual Connectors and Signals Parallel Interface, 132

132

Connectors and Signals (Parallel Interface)

Pin	Signal Name				IN/OUT	Function
No.
						Signals when data is ready to be read. Signal goes from HIGH to LOW (for at
1		STROBE			IN
						least 0.5 microsec.) when the data is available.
2-9		DATA1-8			IN	These signals provide the information of the first to eighth bits of parallel data.
						Each signal is at HIGH level for a logical 1 and at a LOW level for a logical 0.
10					OUT	A 9 microsecond LOW pulse acknowledges receipt of the data.
				ACK
						When this signal goes to LOW, the printer is ready to accept data. When the
						printer is in one of the conditions below, “HIGH” is set.
11			BUSY		OUT	1. Data is being entered
						2. Off line
						3. Error condition
						This signal indicates the status of the paper sensor.
						[In Star mode]
						This signal goes to HIGH when either the TOF or the BOF sensor detects that
12	PAPER OUT				OUT	there is no paper. The signal will go to LOW when both the TOF and BOF
						sensor detect that there is paper installed.
							APPENDIX
						[In the ESC/POS mode]
						This signal outputs the status of the sensor selected using the <ESC> “c3”
						command.
13	SELECTED				OUT	This signal is HIGH when the printer is online.
14-15				N/C		Unused
16	SIGNAL GND					Signal ground
17	CHASSIS GND					Chassis ground, isolated from logic ground
18	LOGIC HIGH					3.9 kΩ pull-up
19-30			GND			Twisted pair return the signal to ground level.
						This becomes a reset signal when DIP switch 1 is set to ON. (See page 128 for
31					IN	details.) When this signal goes to LOW (for at least 0.5 microsec.), the printer is
			RESET
						reset to its power-on condition.
						This signal is normally HIGH. This signal goes to LOW to signal that the printer
32			ERROR		OUT
						cannot print due to an error condition.
33	EXT GND					External ground
34	COMPULSION				OUT	Compulsion signal (See page 135.)
35			+5VDC			2.2 kΩ pull-up