Samsung SCX-6345N/XAA Service Manual page 31

System Overview
3.2.3 Network Interface Card (NIC) Block Diagram - Option
This device is necessary to provide users with Network Printing, Network Scanning, Scan-To-Email function and helps
manage Jungfrau machine efficiently in Network environment with Embedded Web Service when installing this device.
This device, which comprising Network Printer Card-related circuit is designed for providing users with easy-install
through screwing with Main Control Board by 80 pin connector.
1) CPU (ARM7 based S3C2510)
This device includes IEEE802.3 MAC Core as 32Bit RISC Controller only for Network Control having ARM9 Core. It
converts/uses 10MHz input clock into 33MHz System clock by using internal PLL.
The communication between Main PBA and CPU enables the high-speed/high-efficiency transmission through 33MHz
PCI Bus
2) ROM (Flash Memory)
Jungfrau uses 2MB Flash Memory for operating System Program.
This Flash Memory stores software for NIC Firmware which controls entire Network Protocol and software for Embedded
Web Service & Network Management.
Flash Memory Size needs to be extended or reduced in case Embedded Web Service requires like Embedded Web
Pages & MIB besides Network Printing and Scan-To Email function.
This Flash Memory can be upgraded through Network by using EWS or MIB.
3) RAM
16MB SDRAM is used as System Program buffer or Network Data buffer.
4) PHY ; STE100P PHY chip
Converting Network signal into Digital signal, it supports MII and requires 10MHz clock input.
Service Manual
3-6
Samsung Electronics