Intel S2400SC - Advanced Programmable Interrupt Controller (APIC); Gigabit Ethernet Controller; Universal Serial Bus (USB) Controller

Functional Architecture Intel® Server Board S2400SC TPS
36 Intel order number G36516-002 Revision 2.0
The C600 chipset supports LPC DMA, which is similar to ISA DMA, through the C600 chipset’s
DMA controller. LPC DMA is handled through the use of the LDRQ# lines from peripherals and
special encoding on LAD[3:0] from the host. Single, Demand, Verify, and Increment modes are
supported on the LPC interface.
The timer/counter block contains three counters that are equivalent in function to those found in
one 82C54 programmable interval timer. These three counters are combined to provide the
system timer function, and speaker tone. The 14.31818 MHz oscillator input provides the clock
source for these three counters.
The C600 chipset provides an ISA-Compatible Programmable Interrupt Controller (PIC) that
incorporates the functionality of two, 82C59 interrupt controllers. The two interrupt controllers
are cascaded so that 14 external and two internal interrupts are possible. In addition, the C600
chipset supports a serial interrupt scheme.
3.3.10
Advanced Programmable Interrupt Controller (APIC)
In addition to the standard ISA compatible Programmable Interrupt controller (PIC) described in
the previous section, the C600 incorporates the Advanced Programmable Interrupt Controller
(APIC).
3.3.11
Universal Serial Bus (USB) Controller
The C600 chipset has up to two Enhanced Host Controller Interface (EHCI) host controllers that
support USB high-speed signaling. High-speed USB 2.0 allows data transfers up to 480 Mb/s
which is 40 times faster than full-speed USB. The C600 chipset supports up to fourteen USB 2.0
ports. All fourteen ports are high-speed, full-speed, and low-speed capable.
3.3.12
Gigabit Ethernet Controller
The Gigabit Ethernet Controller provides a system interface using a PCI function. The controller
provides a full memory-mapped or IO mapped interface along with a 64 bit address master
support for systems using more than 4 GB of physical memory and DMA (Direct Memory
Addressing) mechanisms for high performance data transfers. Its bus master capabilities enable
the component to process high-level commands and perform multiple operations; this lowers
processor utilization by off-loading communication tasks from the processor. Two large
configurable transmit and receive FIFOs (up to 20 KB each) help prevent data underruns and
overruns while waiting for bus accesses. This enables the integrated LAN controller to transmit
data with minimum interframe spacing (IFS).
The LAN controller can operate at multiple speeds (10/100/1000 MB/s) and in either full duplex
or half duplex mode. In full duplex mode the LAN controller adheres with the IEEE 802.3x Flow
Control Specification. Half duplex performance is enhanced by a proprietary collision reduction
mechanism.