Epson 7000 service manual Connector Pin Assignments ECP Mode

EPSON Stylus Pro 7000 Revision B

Table 1-20. Connector Pin Assignments - ECP Mode

Pin	Signal Name	Return	In/	Functional Description
No.		Pin	Out
1	HostClk	19	I	Data or address information is transferred
				from the host to the printer.
				The DATA0 through DATA7 signals
				represent data bits 0 to7, respectively.
				Each signal is at high level when data is
2-9	Data0-7	20-27	I	logical 1 and low level when data is logical
				0. These signals are used to transfer the
				1284 extensibility request values to the
				printer.
10	PeriphClk	28	O	Data is transferred from the printer to the
				host.
				The printer uses this signal for flow
				control in the forward direction. Also used
11	PeriphAck	29	O	for data bit 9 which indicates command
				information and data to be output on the
				data signal in the forward direction.
				The printer goes to Low and approves the
12	nAckReverse	28	O	nReverseRequest.Acknowledge data
				request signal and reverse channel
				transfer data bit 2 or 6.
13	Xflag	28	O	X-flag signal and reverse channel transfer
				data bit 1 or 5.
				The host uses this signal for flow control
				in the reverse direction. Also used for data
14	HostAck	30	I	bit 9 which indicates command
				information and data to be output on the
				data signal in the forward directions.
15	NC			Not connected
16	GND			Signal ground
17	Chassis GND			Chassis ground
18	PeriphLogic-		O	Always HIGH. Pulled up to +5V via 3.9K
	H			ohm resister.
19-30	GND			Ground for twisted pair return

Table 1-20. Connector Pin Assignments - ECP Mode

Pin	Signal Name	Return	In/	Functional Description
No.		Pin	Out
31	nReverseReq	30	I	This signal goes low to change to the
	uest			reverse channel.
32	nPeriphRequ	29	O	This signal produces a host interrupt.
	est
33	GND			Ground for twisted pair return
34	NC			Not connected
35	+5V	----	O	Always HIGH. Pulled up to +5V via 1.0K
				ohm resister.
36	1284-Active	30	I	1284 Active Signal. HIGH in ECP mode

Note: In (I) and Out (O) refer to the direction of signal flow from the printer’s point of view.

Product Description Interfaces 28