Fujitsu DL3750+/3850+ Compatible Mode, Pin Return Signal Direc Description Pin No Name Tion, Ack

INTERFACE INFORMATION

Compatible Mode

Pin	Return		Signal	Direc-		Description
No.	Pin No.		name	tion
1	19			Input	This signal is a strobe pulse
			Data Strobe
					for reading data (Data 1 to 8).
			(DSTB)
					The printer reads data when this
					signal is low. The pulse width
					must be 1 µs or more at the
					receiving terminal.
2–9	20--27	Data 1 to 8		Input	Data 8 (pin 9) is the most
					significant bit; however, this pin
					is not used in 7-bit ASCII
					communications.
					Logical 1 signals must go high at
					least 1 µs before the falling edge
					of the	Data Strobe	signal and
					must stay high for at least 1 µs
					after the rising edge.
10	28			Output	This pulse signal indicates
			Acknowledge
			(ACK)		that the printer has received data
					and is ready to accept the next set
					of data.
					This signal is also sent when the
					printer is switched from offline to
					online.
11	29		Busy	Output	Data cannot be received when
					this signal is high. This signal is
					high during data entry, when the
					printer is offline, when the buffer
					is full, or when an error occurs.
12	30		Paper Empty	Output	This signal is high when the
			(PE)		printer is out of paper.

D-2 User's Manual