Ricoh Aficio 270 - Memory Controller and Enhanced Memory Board (Emb)

IMAGE PROCESSING
A265/A267 2-28 SM
2.2.5 MEMORY CONTROLLER AND ENHANCED MEMORY BOARD
(EMB)
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 and 2-bit image data
Image rotation
Image data transfer to the DRAM
DRAM (standard 20MB): Stores the compressed data
Working area
The data goes to the memory controller after binary picture processing or grayscale
processing. The data is first compressed and then stored in the DRAM. For
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.
Standard (20 MB)
20 MB + Optional
(68 MB total)
A4 6% 88 99
Binary picture
processing
ITU-T#4 (12% black) 32 99
A4 6% Not available 99
Grayscale
processing
ITU-T#4 (12% black) Not available 52
[A4 size, Text mode (Number of pages)]
IPU
Memory
Controller
Optional
DRAM
(48 MB)
BICU
BUS
CPU
DRAM
(20 MB)
A265D515.WMF