Parallel Interface Circuit - Epson EPL-5500 Service Manual

Operating Principles

2.2.1.5 Parallel Interface Circuit

Figure 2-31 shows a circuit block diagram of the parallel interface.
computer is latched within the E05A93 by the STROBE signal. The E05A93 outputs a BUSY signal
automatically to stop the host computer from sending additional data. The CPU resets the BUSY
signal after reading the data from the E05A93, so that the printer is ready to receive more data from
the host computer.
2-22
DATA
STROBE
BUSY
Figure 2-31. Parallel Interface Circuit
EPL-5500 Service Manual
Data sent from the host
Latch
E05A93
(IC4)
Rev. B