Oki B4100 - Manual (Page 424)

40055101TH Rev.4 424 /
A3.2.15 M17 Circuit Diagram (Page 16/17)
1. Block diagram
The circuit diagram shown on page 16/17 consists of the following functions and connectors:
•
RAM3 to RAM5
Figure A3.2.22 shows the block diagram of DRAM.
2. Function
1) PSRAM
2 MByte DRAM x 1 (RAM3) for ODA version
512 KByte DRAM x 2 (RAM4 and RAM5) for INT'L version
•
Used as follows:
Picture memory for the ECM send/receive modes.
Picture memory for the memory transmission mode.
Picture memory for the retransmission mode.
Picture memory for the reception in memory.
Editing for report printing.
RAM4
RAM5
RAM3
PSRAM
PSRAM
512kByte
512kByte
DRAM
2MByte
A1 - A10
DRAS1-N
DWRL-N
DCASH-N
DCASL-N
AD0 - AD15
AD08 - AD15
AD0 -
AD07
AD0 -
AD03
A1 - A19
A1 - A10
A1 - A18
Figure A3.2.22 Block Diagram of DRAM