Service manual

30 July, 2001 CONTROLLER
6-63
Detailed
Descriptions
6.10 CONTROLLER
6.10.1 OVERVIEW
The controller uses GW (Grand Work) architecture.
1. CPU: QED RM7000 (250 MHz)
2. COMIC (Color Model IC): GW architecture ASIC. It uses a 100 MHz bus (64
bit) for interfacing with CPU and memory. It controls the interface with the CPU
and also controls the following functions: memory, local bus, interrupts, PCI
bus, video data, HDD, network, operation panel, IEEE1284, and image
processing.
3. SDRAM DIMM (2 slots): 32 MB SDRAM (resident), expandable up to 384 MB
with a 64 MB, 128 MB, or 256 MB SDRAM.
4. Flash ROM: 2 MB flash ROM programmed for network applications
5. ROM DIMM (3 slots): The DIMM installed in the machine includes 8 MB flash
ROM programmed for system, printer, PCL5c, PS3, and RPCS applications.
This DIMM also includes 8 kB of Mask ROM for storing internal printer fonts.
Currently the remaining two DIMM slots are not being used.
6. NVRAM: 8 kB NVRAM for storing the printer parameters and logged data
7. IEEE1284 Interface: Supports compatible, nibble, and ECP modes
COMIC
Flash ROM
2MB
NVRAM
8kB
NVRAM
Board 64kB
IC Card
CPU
SDRAM
DIMM x 2
IEEE1394
I/F
HDD
NVRAM I/F IC Card I/F
Flash ROM
DIMM 8MB
ROM DIMM I/F
PHY
Network
I/F
IEEE1284
I/F
PCI
I/F
IDE
I/F
SDRAM DIMM I/F RAPI
BCU
Controller
G060D553.WMF