Epson TM-T88V Technical Reference Guide - Page 114
Caution, Nc: No
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Pin Source Compatibility Mode Nibble Mode Byte Mode 28 29 30 31 Host 32 Printer 33 34 Printer 35 Printer 36 Host GND GND GND Init Fault GND DK_STATUS +5V SelectIn GND GND GND Init DataAvail/Data0,4 ND ND ND 1284-Active GND GND GND Init DataAvail ND ND ND 1284-Active NC: Not Connected ND: Not Defined CAUTION A signal name with a rule above it indicates an "L" active signal. Bidirectional communications cannot take place, unless all signal names for both sides correspond to each other. Connect all signal lines using a twisted-pair cable. Connect the return side to the signal ground level. Make sure the signals satisfy electrical characteristics. Set the leading edge and trailing edge times to 0.5ms or less. Do not ignore Ack or BUSY signals during a data transfer. Ignoring such signals may result in data corruption. Make the interface cables as short as possible. 114