Section 7: Interface Specifications
Page 7-8
CG4 Series Operator Manual
7.3 IEEE 1284 PARALLEL INTERFACE (cont’d)
7.3.3 Input/Output Signals
The details of each signal line for the Centronics standard (Compatible Mode) are as follows.
Note that each signal line complies with the IEEE1284 standard.
Signal I/O Description
STROBE Input Synchronization signal that requires low active pulse to read
DATA1 ~ DATA8
DATA 1 ~ DATA 8 Input Data entry of 8bits parallel: DATA1 --LSB (lowest bit)
DATA8 --MSB (highest bit)
ACK
Output Low active pulse signal indicating the completion of receive data
import
BUSY Output High active signal indicating that the printer is not ready to
receive data
PE Output High active signal indicating paper shortage
SELECT Output High active signal indicating that the printer is ready to receive
data
AUTOFD
Input Signal for the IEEE1284 standard
CHASSIS GND Connecting to framework ground
PERIPHERAL LOGIC
HIGH
Output +5V voltage on the printer side
SIGNAL GND Connecting to each signal ground
INIT
Input Low active pulse signal requesting to reset the printer
FAULT
Output Low active pulse signal indicating an error in the printer
SELECTIN
Input Signal for the IEEE1284 standard
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