Service manual

Section I: Imagesetter
Functional Analysis 2-9
The OCP module consists of the following submodules and is shown in the OCP
block diagram in Figure 2-3.
• 68HC11 Micro-controller
• Program/Display FLASHROM
• Liquid Crystal Display (LCD)
• Keypad Matrix
• OLP Serial Interface
• SPVAPIS Serial Interface
• Speakers (Audio Interface)
Figure 2-3 Operator control panel (OCP) block diagram.
2.5.1 Micro-controller
The OCP micro-controller is the main processing element in the OCP module.
2.5.2 OCP FLASHROM
The OCP FLASHROM contains the graphic display data for the control panel (i.e.,
icons) as well as the main OCP code. The OCP module uses a 2M. (512 x 8) ver-
sion of this ROM. A serial communication link to a PC, which can be remote or on-
site, can update the FLASHROM.
FLASHROMS, unlike UVPROMS, can be electrically erased and re-programmed.
This eliminates the need of physically replacing the component. Erasure/re-pro-
gramming of the FLASHROM is limited to 10,000 cycles.
SPI/APIS
Serial Interface
68HC11
Micro-Controller
Speaker
Program/
Display
Flashrom
Liquid
Crystal
Display
Keypad
Matrix
OLP
Serial Interface