Publication No.
500-9300007876-000
Rev. C.0
Functional Description 65
6.2 QM87 Express Chipset
Intel’s QM87 Express Chipset supports the CPU and provides extensive I/O
support for the XVR16. This includes:
• Eight PCI Express ports from the QM87 Express Chipset; Three ports from
the CPU (See
Section 6.5 PCI Express Interfaces
• ACPI Power Management Logic, Revision 4.0a
• Enhanced Direct Memory Access (DMA) controller, interrupt controller, and
timer functions
• Integrated Serial ATA host controllers
– with independent DMA
– operation of up to six ports, up to 60 Gbit/s on two ports
• USB host interface
– Two EHCI high-speed USB 2.0 Host controllers and two rate matching
hubs
–
XHCI Host Controllers supporting SuperSpeed USB 3.0
• System Management Bus (SMBus) interface
• Supports Intel Rapid Storage Technology
• Supports Intel Virtualization Technology for Directed I/O
• Four digital ports are supported in the CPU
– DisplayPort
– Embedded DisplayPort (Drives EDP to VGA)
– Two DVI ports
• Serial Peripheral Interface (SPI) support
• Support for TXT (Trusted Execution Technology)
6.3 CPU Memory Controller
The CPU integrated dual channel memory controller in the XVR16 supports dual
data rate synchronous DRAM (DDR3) with a data bus width of
64 bits. The XVR16 offers 8 GBytes or 16 GBytes of SDRAM with full ECC
support.
CAUTION
Caution must be used when sharing memory between the local processor and the VME to prevent a
VME deadlock and to prevent a VME master from overwriting the local processor’s operating system.
6.3.1 Memory Controller Features
• Dynamic DDR3 Memory
–
Memory DDR3 data transfer rates of 1600 MT/s
• Dual 64-bit memory controllers with ECC and SPD, DDR3L, 1600 MHz
– 8 GByte and 16 GByte options
•
Unbuffered DDR3
• Theoretical maximum memory bandwidth of 21.3 GByte/s in dual channel
mode assuming DDR3 1600 MT/s