40496501TH Draft Version
14
Figure 2.3
(3)
DRAM(IC28)
The RAM is CMOS dynamic RAM with (256K x 16 bit) configuration, and used as buffers (such
as receiving buffer, printing buffer, DLL buffer and working buffer).
The following shows the examples of the memory access operation.
MPU CLOCK
ALE
A16~BHE
AD0~AD15
RD
AD0~AD15
WR
CS
AD0~AD15
A16~BHE
DRAMD0~D15
DRAMA0~A9
MPU
NHDC LSI
DRAM
A16~BHE
A0–A15
D0–D15
A0–A15
D0–D15
ALE
RD
WR
CS
CLK
RAS
CASU
CASL
RD
WR
Summary of Contents for PACEMARK 4410
Page 1: ...PACEMARK 4410 PRINTER SERVICE HANDBOOK...
Page 52: ...40496501TH Draft Version 52 Figure 3 1 3 2 Parts Layout...
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