IMAGE PROCESSING17 May, 1999
2.2.5 MEMORY CONTROLLER AND EXTENDED MEMORY BOARD
(EMB)
Optional
IPUDRAM
(48 MB)
Memory
Controller
BUS
CPU
DRAM
BICU(16 MB)
A250D528.WMF
The BICU consists of the memory controller and the DRAM. The functions of each
device are as follows.
Memory Controller:Compressing the 1-bit image data
Image rotation
Image data transfer to the DRAM
DRAM (standard 16MB): Stores the compressed data
Working area
The data goes to the memory controller after binary picture processing. The data is
first compressed and then stored in the DRAM. When printing, the data from the
DRAM goes back to the memory controller, where it is decompressed and image
editing is done (e.g., image rotation, repeat image).
The memory capacity changes after installing optional memory on the BICU board,
as follows.
16 MB + Optional
Standard (16 MB)
(64 MB total)
A4 6%8099
Number of pages
ITU-T#4 (12% black)3599
2-20 |
ACEC
RICOH
