Toshiba DP1600 Service Manual page 256

18.2.2 Schematic
The figure below shows a schematic diagram of the page memory board.
I/O
Scanner
Printer
(1) Page memory
32 MB of memory (DRAM) are mounted on the main board as standard.
The Option page memory board specification (DRAM)
Model
Access time
Memory configuration
Address
Refreshment cy
The page memory board is provided with two slots for mounting the main PC Board.
Adding on this memory board increases the memory to 128 MB.
December 2000 © TOSHIBA TEC
Page memory controller
Control ASIC
I/O control
Address control
Data control
Rotation/merger control
Compression/decompression
Page Memory Board Schematic
HM5264405F-A60 or equivalent product
100 nS
4194304 x 4 bits x 4 banks
Row address
Column address
Bank select address
4096 cycle/64mS
Memory
SD-RAM
Standard
Extension slot (2)
Expanded memory board
Max 128MB
A0-A1
A0-A9
A12-A13
18 - 3 1600/2000/2500 PAGE MEMORY BOARD
Page memory
32MB