Sun Microsystems 60 service manual 2514

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2514

FIGURE B-6Parallel Port Connector Pin Configuration

TABLE B-6Parallel Port Connector Pin Assignments

Pin	Mnemonic	Signal Name	Description
1	Data_Strobe_L	Data Strobe Low	Set low during forward channel
			transfers to latch data into
			peripheral device. Set high during
			reverse channel transfers.
2 to 9	Data[0..7]	Data0 Thru Data7	The main data bus for the parallel
			port. Data0 is the least significant
			bit (LSB). Are not used during
			reverse channel transfers.
10	ACK_L	Acknowledge Low	Driven low by the peripheral
			device to acknowledge data byte
			transfer from host during forward
			channel transfer. Qualifies data
			being transferred to host in reverse
			channel transfer.
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
			on-line during forward channel
			transfer. Used to send Data1 and

Data5 during reverse channel transfer.

B-12Sun Ultra 60 Service Manual • August 2001