BLOCK DIAGRAM
SM 4-1 B441
Printer Unit
B441
4. DETAILED SECTION DESCRIPTIONS
4.1 BLOCK DIAGRAM
The CPU (Destiny D8401A, 75MHz) controls the resident RAM, engine interface,
ROM interface, IEEE1284 parallel interface, NIB interface, and an IC card interface
for upgrading firmware.
There is one optional memory socket that can have either a 32MB, 64MB, or a
128MB memory DIMM to increase RAM capacity and enable RAM collation. With
the 128MB memory DIMM, the RAM capacity is increased to 144MB. There is
another memory socket for the optional PS2 DIMM.
The NIB interface allows the user to install an Ethernet NIB. The IC card interface
allows the interface for the controller and NIB to be updated.
CPU
(75 MHz)
IEEE1284
Interface
Option DIMM
Interface
Resident
RAM
(16 MB)
PS2
Interface
Engine
Interface
NVRAM
(8 KB)
Flash ROM
(4 MB)
NIB
Interface
Engine
Board
Network
Interface
Board
IC Card
Interface
IEEE1284
Option
Memroy
DIMM
(32MB/64MB/
128MB)
PS2
DIMM
(4 MB)
IC Card
(4 MB)
B441D500.WMF