Lexmark T620 Technical Reference - Page 312
Optional Parallel Connector, IEEE 1284 Nibble, Byte, and ECP protocols.
View all Lexmark T620 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 312 highlights
8-14 Interfaces • Controls data flow control with BUSY and ACKNLG* signals. Does not carry out data transfer by ignoring the BUSY or ACKNLG* signal. (The system can carry out data transfer to the printer only when the level of the BUSY signal is low and after confirming the ACKNLG* signal is high.) • Uses standard transistor-transistor logic (TTL) levels for all interface control signals and input data. Interface conditions are based on TTL levels. All printer outputs are totem-pole TTL devices. All printer input/output (I/O) are devices with an internal pull-up resistor to 5 V. Rise and fall times of each signal must be less than 1,500 nanoseconds (ns) without slope reversal. Optional Parallel Connector The cabling in the following illustration supports Standard and Fastbytes protocols and IEEE 1284 Nibble, Byte, and ECP protocols. 18 IEEE 1284-C 36 Printer Side 14 Computer Side 1 IEEE 1284-A 36-Pin D-Shell Connector (Male) 25-Pin D-Shell Connector (Male) 1 19 25 13