Imb (Memory Controller And Dram) - Ricoh B039 Service Manual

IMAGE PROCESSING

6.1.5 IMB (MEMORY CONTROLLER AND DRAM)

The functions of the these two IMB component devices are as follows:
Memory Controller: Compression of the 1-bit image data
DRAM (16MB):
The data goes to the memory controller after binary picture/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
goes through image editing (e.g., image rotation, repeat image).
When the 16 and 32 MB memory is installed on the BiCU board, the memory
capacity changes as follows:
A4 6%
ITU-T#4 (12% black)
NOTE: The amount of standard memory depends on the model:
B039: North America (16MB standard), Others (no standard memory).
B040, B043: 16MB standard.
B039/B040/B043
Image rotation
Image data transfer to the DRAM
Stores the compressed data
Processing area
A4 size, Text mode (Number of pages)
0 MB
0
0
6-28
16 MB 48 (16+32) MB
71
34
99
99
SM