Epson Stylus Pro 7600 - UltraChrome Ink Service Manual - Page 94
ECP Mode
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EPSON Stylus Pro 7600/9600 1.6.1.3 ECP Mode SPECIFICATION Transmission mode: IEEE-1284ECP mode Synchronization: IEEE-1284 specification Handshaking: IEEE-1284 specification Signal level: TTL compatible (IEEE1284Level 1 device) Data trans. timing: IEEE-1284 specification Extensibility Request: The printer responds affirmatively when the extensibility request values are 10H or 04H, that mean, 10H Request ECP Mode Reverse Channel Transfer. 14H Request Device ID; Return Data Using ECP Mode Rev Channel Transfer. Device ID: When IEEE1284.4 is valid • (Character strings, depending on ) • MFG: EPSON; • CMD: ESCPL2,BDC,D4; • MDL: ; • CLS: PRINTER; • DES: EPSONT;(: space) When IEEE1284.4 is not valid • (Character strings, depending on ) • MFG: EPSON; • CMD: ESCPL2,BDC; • MDL: ; • CLS: PRINTER; • DES: EPSONT; (: space) Revision A CONNECTOR PIN ASSIGNMENT AND SIGNALS Table 1-56. Connector Pin Assignment and Signals (ECP) Pin Return No. GND Pin Signal Name In/Out* Function 1 19 HostClk Data or address information are transferred from a host to a In printer. 2 20 DATA0 In 3 21 DATA1 In 4 22 DATA2 5 23 DATA3 6 24 DATA4 7 25 DATA5 In In The DATA0 through DATA7 signals represent data bits 0 to 7, respectively. Each signal is at high level when data is In logical 1 and low level when data is logical 0. In 8 26 DATA6 In 9 27 DATA7 In 10 28 PeriphClk Out Data is transferred from a printer to a host. 11 29 PeriphAck A printer uses this signal for a flow control of forward direction. Also this signal offers the data bit 9 that use it to Out judge whether or not it is information command information or data to be output on the data signal of reverse direction. 12 28 nAckReverse Out A printer does drive to Low and approve nReverseRequest. 13 28 Xflag Out X-flag signal and reverse channel transfer data bit 1 or 5. 14 30 HostAck A host uses this signal for a flow control of reverse direction. Also this signal offers the data bit 9 that use it to In judge whether or not it is information command information or data to be output on the data signal of forward direction. 31 30 nReverseRequest In This signal is made a low, to change a channel toward reverse. 32 29 nPeriphReques Out This signal uses to produce a host interrupt. 36 30 1284-Active In 1284 active signal. "HIGH" in ECP mode 18 -- PeriphLogic Out Always "HIGH". Pulled up to +5 V via 3.9 K ohm resistor. 35 -- +5V Out Always "HIGH". Pulled up to +5 V via 1.0 K ohm resistor. 17 16,33 19-30 15,34 -- Chassis GND -- GND -- NC -- Chassis GND. -- Signal GND. -- Not connected. Note "*": In/Out refers to the direction of signal flow from the printer's point of view. Product Description Interfaces 94