Epson FX 890 - B/W Dot-matrix Printer

FX-1180/FX-880 Service Manual
Chapter 2 Operating Principles
Rev. B
2-
6
Data from the host computer is stored in the input buffer once, then converted into image data and
transmitted to the printhead through the gate array, as shown in the figure below:
H ost com puter
CPU
Printhead driver
circuit
Print data
conversion
Im age data
tra n s fe r
Input buffer
Im age buffer
RAM
Gate array
D a ta la tc h
and
data output
Figure 2-6. Data Flow