Intel S3210SHLX - Entry Server Board Motherboard Specification page 36

Functional Architecture
provides two modes of operation – a legacy mode using I/O space and an AHCI (Advanced
Host Controller Interface) mode using memory space.
3.2.3.5 PCI Interface
The ICH9 PCI interface provides a 33MHz, 3.3V, Revision 2.3 implementation. All PCI signals
are 5V tolerant, except PME#. The ICH9 integrates a PCI arbiter that supports up to seven
external PCI bus masters in addition to the internal ICH9 requests. This allows for combinations
of up to four PCI down devices and/or PCI slots.
The server board supports one NIC, the Tabor Gigabit Ethernet controller, and two PCI slots.
3.2.3.6 Low Pin Count Interface (LPC)
The Low Pin Count interface on the ICH9 provides a low system cost design interface solution
for connecting the Super I/O for the legacy interfaces such as the parallel port, serial port, floppy
drive, etc.
3.2.3.7 Compatibility Modules
The ICH9 incorporates various compatibility modules such as DMA controller, timer/counters
and interrupt controller. The DMA controller incorporates the logic of two 8237 DMA controllers,
with seven independently programmable channels. The channels 0 – 3 are hardwired to 8-Bit,
count-by-byte transfers and channels 5 to 7 are hardwired to 16-Bit, count-by-word transfers.
DMA channel 4 is used to cascade the two 8327 controllers together. The DMA controller is
used to support the LPC DMA.
The LPC DMA is handled through the LDRQ# lines from peripherals and special encoding on
LAD[3:0] from the host.
The timer/counter block contains three counters that are equivalent in function to those found in
one 8254 programmable internal timer. These three counters are combined to provide the
system timer function, and speaker tone. The 14.318MHz oscillator input provides the clock
source for these three counters.
The ICH9 provides an ISA compatible Programmable Interrupt Controller (PIC) that incorporates
the functionality of two 8259 interrupt controllers. Each 8259 supports eight interrupts that are
cascaded via one master controller interrupt 2 for fifteen programmable interrupts.
interrupts are system timer, keyboard controller, serial ports, parallel ports, floppy disk, mouse,
DMA channels, and mapped PCI based interrupts.
3.2.3.8 Universal Serial Bus (USB) Controller
ICH9 contains two EHCI and six UHCI USB controllers providing support for twelve USB 2.0
ports. All twelve ports are high speed, full-speed, and low speed capable. ICH9's port routing
logic determines whether a USB port is controlled by one of the UHCI controllers or by the EHCI
controller. USB 2.0 based debug port is also implemented in the ICH9.
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Intel® Server Boards S3200SH/S3210SH TPS
The
Revision 1.3