Sun Microsystems 220R service manual Initl

Pin	Mnemonic	Signal Name	Description
10	ACK_L	Acknowledge	Driven low by the peripheral
		Low	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.
14	AFXN_L	Auto Feed Low	Set low by the host to drive the
			peripheral into auto-line feed mode
			during forward channel transfer.
			During reverse channel transfer, set
			low to indicate host can receive
			peripheral device data and then set
			high to acknowledge receipt of
			peripheral data.
15	ERROR_L	Error Low	Set low by the peripheral device to
			indicate an error during forward
			channel transfer. In reverse channel
			transfer, set low to indicate
			peripheral device has data ready to
			send to the host. Used to send
			Data0 and Data4.
16	INIT_L	Initialize Low	Driven low by the host to reset
			peripheral.

Connector Signal Descriptions 241