Samsung SCX-6320F, Service Manual

Page: 39 / 208

Summary of Product
Service Manual
4-17
Samsung Electronics
4.3.3 Network Interface Card (NIC) Block Diagram - Option
The NPC card is supplied as an option kit (not factory fitted). It is supplied with a Qwerty keyboard and a 48MB
memory module. This kit is required in order to support EMAIL features.
Note The 16MByte memory fitted in the DIMM socket (SCX6320 only) must be removed and discarded.
1) CPU (NetOne)
This device includes IEEE802.3 MAC Core, UART, USB host, and IEEE1284 Host controller and is based on a
32Bit RISC processor having an ARM7 Core. It converts/uses 25MHz input clock into 48MHz System clock by
using internal PLL logic for use with the internal USB I/F. It has an embedded 8KB SRAM. The NPC card
exchanges data with the Main Controller PBA through the SDRAM using a 16 Bit Data Bus.
Communication between the Main PBA and CPU uses a high-speed/high-efficiency DMA transfer process
through Shared Memory embedded in NetOne.
Note The SCX-6320F does not use the USB Interface which is embedded in NetOne.
2) ROM (Flash Memory)
The NPC used in the SCX-6320F has 2MB of Flash Memory for the operating System Program.
This Flash Memory stores the NPC Firmware which controls the entire Network Protocol and software for
Embedded Web Service & Network Management.
This Flash Memory can be upgraded through Network by using the EWS (Embedded Web Server) or SyncThru
Management software.
Regulator 80
p
i
n
C
o
n
n
e
c
t
o
r
Clock
DRAM
USB2.0 Controller
USB Jack
Flash ROM EEPROM IEEE802.B 11
PCL6
Font ROM
(Flash ROM)
Downloadable Fonts
Memory
(Flash ROM)
CPU
Net One
PHY RJ-45
LED
LED
Ethernet Interface(10/100T) Block
USB Block
Fonts Memory Block