Epson EPL-N4000 - Controller; Functions of the Controller; Specification on the Controller

EPSON EPL-N4000/EPL-N4000+ Chapter 2 Operating Principles
Rev.B 87
2.7.2 Controller
The video data from the host computer is input to the controller circuit
throu
g
h either interface circuit or network board. C262 Main Board,
which is the control circuit of this printer,
g
enerates video si
g
nal by
convertin
g
the data based on the printin
g
data from the host computer
into the laster data. Laster data is sent to Laser Diode PWB as video
si
g
nal. On the Laser Diode PWB, the emission li
g
ht of Laser Diode is
turned on or off by the video si
g
nal.
2.7.2.1 Functions of the Controller

Communication between the host computer and network

Processin
g
the Printin
g
Data (Analyzin
g
the command and
g
eneratin
g
video si
g
nal)

Sendin
g
the video si
g
nal to ROS Assembly

Monitorin
g
the control panel

Memory Mana
g
ement

Data Buffer
2.7.2.2 Specification on the Controller
The table below shows specifications on the controller.
Table 2-1. Specification on the Controller
Type Name (Location) Function
CPU R4700(IC1) CPU controls the controller and is driven b
y
64 bit interior clock 133 MHz.
ASIC E05B51 (IC2) Memor
y
control and DMA control.
E05B52 (IC23) Connectin
g
E05B51 and E05B40
E05B40 (IC26) Control Panel, Host I/F control
E05B56 (IC32) PGI, RIT, En
g
ine I/F, Toner Counter
Memor
y
Mask ROM(IC10,
11) / Flash ROM
(CN4,7)
IPL/Font
ROM DIMM Code, Local lan
g
ua
g
e and Expansion ROM
DRAM SDRAM DIMM is used for both Standard and
Expansion.
EEPROM(IC405) 128kbit Serial t
y
pe, Storin
g
the settin
g
values
of the printer.
EEPROM 64Kbit, Parallel T
y
pe, (onl
y
pattern)
Host I/F Parallel I/F IEEE-1284, B-t
y
pe connector
Network 10/100 BaseT
Control Panel Control Panel Unit LCD(20x1), 8 SWs, 6 LEDs
Expansion ROM Expansion b
y
ROM DIMM
DRAM Expansion b
y
DIMM
T
y
pe-B 2 slots, but onl
y
Ch1
Hard Disk P Bus (No DMA)
ROM Bus Expansion for ROM and I/F
Clock CPU 66.66660 MHz
Video 67.1749 MHz
Dot 33.58748 MHz
DMA Video. Color PCI (CPU Bus)
Video. Monochrome E05B56
I/O E05B52 via E05B40 + T
y
pe-B