Oki IP-6620, Руководство по обслуживанию

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OKI Data Infotech Corporation CONFIDENTIAL
Chapter 8 Operation Mechanism
8-25

Image data path
The following diagram shows the image data path.
Figure 8.7 Image data path
(1) USB R8A66593
USB M66590 is a USB interface controller device. It transfers image data to ATG via the
bus dedicated to DMA.
(2) ATG
FPGA-ATG is a FPGA that controls the band memory. It has functions to transfer the
image data as shown below:
- from R8A66593 to BM
- from BM to RSM
Only linear order processing is supported for image data transfer from a computer.
(3) RSM
RSM is an FPGA responsible for horizontal/vertical conversion, masking, and adding
white data. It processes image data transferred from the ATG, masks it using data read
from the mask memory, and transfers the image data to PTG.
(4) PTG
PTG is an FPGA that receives image data sent from RSM, and transfers it to each head.
It has 16 FIFO inputs for each row and each head. After reading data from FIFO, PTG
shifts the data in each head via an independent circuit. The shift-in direction is different
between the row A and the row B of each head.
(5) Head
The head drives the actuator of each nozzle based on the shift-in image data.
USB
R8A66593
ATG
BM
256MB
RSM
MASK
Memory
PTG HEAD
x7 or x6
16
8
16
32 16
USB
PCB-ASSY-IPB5-100
PCB-ASSY-HCB1M
PC