User Guide
76 Chapter 4 - Operational overview EN
Formatter system
The formatter coordinates the major systems. It is responsible for the
following:
controlling the scanner formatter
formatting and controlling copies
receiving and processing print data from the printer interface
monitoring the control panel and relaying printer status
information
developing and coordinating data placement and timing with the
print engine
communicating with the host computer through the bidirectional
interface
communicating document data to and from the LIU
The formatter receives print data from the bidirectional Extended
Capabilities Port (ECP) mode interface or Universal Serial Bus (USB)
interface and converts it into a dot image. The ECU synchronizes the
image formation system with the paper-feed system and signals the
formatter to send the print image data. The formatter sends the print
image data (dots) in the form of a video signal, and the printing
process begins.
Central processing unit
The formatter incorporates an embedded Coldfire V3 microprocessor
operating at 90 MHz.
Line Interface Unit (LIU)
The LIU provides the required safety isolation, signal coupling, and
impedance matching between the telephone line and the modem
chipset.
Scanner formatter PCA
The scanner formatter manages the functions of the control panel,
and controls audio, scanning, and the ADF. It relays scanning data,
control panel data, and other control data to the main formatter PCA.