NEC 320Lb-R manual USB/IDE Controller, Network Controllers

BIOS

The BIOS and Setup Utility are located in the Flash EPROM on the CPU board and include support for system setup and legacy device configuration. A number of security, reliability, and management features also have been incorporated to meet vital server needs.

USB/IDE Controller

The ServerWorks ROSB chip supports the USB and IDE controllers. The I/O panel board provides the connector interface for two USB ports that support the keyboard/mouse and floppy diskette drive.

The system includes a single channel enhanced IDE 32 bit interface. The IDE controller provides support for the internally mounted CD-ROM.

The device controls:

!PIO and DMA transfer modes

!Mode 4 timings

!Transfer rates up to 33 MB/s

!Buffering for PCI/IDE burst transfers.

Network Controllers

Each PCI CRU includes a 10BASE-T/100BASE network controller and a 10BASE- T/100BASE-TX/1000BASE-T network controller. As a PCI bus master, the controller can burst data at up to 132 MB/sec. The controller contains two receive and transmit FIFO buffers that prevent data overruns or underruns while waiting for access to the PCI bus. The controller has the following:

!32-bit PCI bus master interface for 10BASE-T/100BASE and a 64-bit PCI bus master interface for a 10BASE-T/100BASE-TX/1000BASE, compatible with PCI Bus Specification, Revision 2.1

!Chained memory structure with improved dynamic transmit chaining for enhanced performance

!Programmable transmit threshold for improved bus utilization

!Early receive interrupt for concurrent processing of receive data

!On-chip counters for network management

!Autodetect and autoswitching for 10 or 100 Mbps network speeds

!Support for both 10 Mbps, 100 Mbps and 1000Mbps networks, capable of full or half duplex, with back-to-back transmit at 100 Mbps

!Support for Wake On LAN.

System Overview 1-27