Intel S3200SHV - Entry Server Board Motherboard Specification page 33

Intel® Server Boards S3200SH/S3210SH TPS
3.2.3.7 Compatibility Modules
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The Intel 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. Channels 0 to 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 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 14.318 MHz oscillator input provides the clock source for
these three counters.
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The Intel 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 with one master controller interrupt 2 for fifteen programmable
interrupts. The 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
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The Intel 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. The port
routing logic of the Intel
controllers or by the EHCI controller. The Intel
port.
3.2.3.9 Real Time Clock (RTC)
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The Intel ICH9 contains a Motorola MS146818A* functionally compatible Real-Time Clock
(RTC) with two 128-Byte banks of battery backed RAM. The RTC performs two key functions on
the server board:
Keeping track of the time of day
Storing system configuration data even when the system is powered down.
The RTC operates on a 32.768 KHz (Kilohertz) crystal and a 3 V lithium battery.
3.2.3.10 GPIO
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The Intel ICH9 contains 61 General Purpose Inputs and Outputs (GPIO) for custom system
design.
3.2.3.11 Enhanced Power Management
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The Intel ICH9 supports the Advanced Configuration and Power Interface, Version 2.0 (ACPI)
that provides power and thermal management. The ICH9 also supports the Manageability
Engine Power Management Support for new wake events from the MCH Management Engine.
Revision 1.8
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ICH9 determines whether a USB port is controlled by one of the UHCI
Intel Order Number: E14960-009
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ICH9 also implements a USB 2.0 based debug
Functional Architecture
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