Epson 9600 Service Manual - Page 91
Interfaces
UPC - 010343841888
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EPSON Stylus Pro 7600/9600 Revision A 1.6 Interfaces 1.6.1 Parallel Interface 1.6.1.1 Compatibility Mode SPECIFICATION Transmission mode: Synchronization: Handshaking: Signal level: Adaptable connector: 8 bit parallel By STROBE pulse By BUSY and ACKNLG signal TTL level (IEEE1284Level 1 device) 57-30360(amphenol) 36 pin or equivalent NOTE: It is recommended to use as short an interface cable as possible. CONNECTOR PIN ASSIGNMENT AND SIGNALS For these signals, twist-pair wires are used, with the return side connected to the signal ground. Table 1-53. Connector Pin Assignment and Signals (Compatibility) Pin No. 1 2 3 4 5 6 7 8 9 Return GND pin 19 20 21 22 23 24 25 26 27 Signal Name -STROBE DATA0 DATA1 DATA2 DATA3 DATA4 DATA5 DATA6 DATA7 In/Out Function The strobe pulse. This signal is normally "HIGH" and In read-in of data is executed after turning "LOW". The pulse width required at the receive end is 0.5 µs or more. In In In The DATA0 through DATA7 signals represent data In bits 0 to 7, respectively. Each signal is at high level In when data is logical 1 and low level when data is In logical 0. In In Table 1-53. Connector Pin Assignment and Signals (Compatibility) (continued) Pin No. 10 11 12 13 14 31 32 36 18 35 17 16,33 19-30 15,34 Return GND pin 28 29 28 28 30 30 29 30 ---- Signal Name -ACKNLG BUSY PE SLCT -AFXT -INIT -ERROR -SLIN Logic H +5V Chassis GND In/Out Function This signal, when the signal level is "Low", indicates that the printer has received data and is ready to accept Out the next data. The pulse width is 1 µs or 3 µs. (See Figure 1-19) This signal, when the level is "HIGH", indicates that the printer can not receive data. When the level is "LOW", the signal indicates that the printer can Out accept data. This signal turns "HIGH" in one of the following cases: During data entry In error status Out This signal, when the level is "HIGH", indicates paper-out error. (Valid when ERROR = "LOW") Out Always at "HIGH" level when the power to the printer is on. Pulled up to +5 V via 1.0 kΩ. In Not used In The printer is initialized by input of a "LOW" pulse whose width is 50 µs or more. Out The "LOW" signal indicates that the printer is in error status. In Not used Out Always at "HIGH" level. Pulled up to +5 V via 3.9 KΩ. Out Always at "HIGH" level. Pulled up to +5 V via 1.0 kΩ. - Chassis GND. -- GND - Signal GND. -- NC - Not used Note 1: "-" is prefixed to each signal which is active at "LOW" level. 2: In/Out refers to the direction of signal flow from the printer's point of view. 3: The "return side" means twist-pair return, which is connected to the signal GND. For interface, each signal is connected with a twist-pair wire and the return side is also connected. For protection against noise, this cable is shielded and connected to the chassis GND for each of the center machine and the printer. 4: All the interface conditions are based on the TTL level standard. Each of the rise time and fall time is 0.2 µs or less. 5: See Figure 1-19 for details of signal timing. Product Description Interfaces 91