Image Data Processor/Fax Communicator - Minolta Di251f Service Manual

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Image Data Processor/FAX Communicator

1. Overview
• This processor has interface blocks with the scanner unit or the printer units, and the FAX
communication block.
• It has the storage coder/decoder and a storage code memory manager (FCUE,LSI),
image memory (DRAM FILE), a printer controller (FCUE LSI), a modem (V.34), and a
communication controller (built in FCUE LSI).
• Each block is controlled by the CPU of the MFB2 board.
• The image memory has an external battery for backup.
Block diagram
Control signal
Printer
Video signal
2. Function
A. Storage coder/decoder (FCUE LSI)
• The coder function codes image data into stored code data. The decoder function
decodes stored code data into image data.
B. Image memory manager (FCUE LSI)
• This block reads/writes the stored code data through interface units (the scanner, the
printer, and the communication units) from/into DRAM FILE by the unit of 1 block.
• The maximum data throughput for DRAM FILE is 320 Mbps. A time division method is
used to refresh read/write of the data through the interface units, and DRAM FILE.
ESP2 LSI
Storage coder
Print
image size
converter
Storage
coder
Control signal
FCUE LSI
Storage
decoder
File management
Storage decoder
Communication
image size
converter
Communication coding/decoding
FAX1 Board
FAX
M-8
Image
memory
Backup
circuit
FAX1 Board
IPUS
LSI
V.34
Modem
4015M503CA