C
URTISS
-W
RIGHT
C
ONTROLS
E
MBEDDED
C
OMPUTING
P
RODUCT
O
VERVIEW
814256 V
ERSION
2 F
EBRUARY
2006
1-7
Processor Node E has either 256 or 512 Mbytes of DDR SDRAM. This memory operates at
DDR 200, which gives an instantaneous peak data transfer rate of 1.6 GB/s at 100 MHz.
Processor E memory is accessible from the processor and from the PCI bus.
F
LASH
M
EMORY
The Compact CHAMP-AV IV provides 32, 64, 128 or 256 MBytes of 32-bit Flash memory on
node A. The Flash devices are specified for 100,000 erase cycles per sector (typical) and a
data retention time of 20 years (typical).
For security against inadvertent Flash programming, set Switches S2[3] and S2[4] both to
the "ON"position. (Note: switch is "ON" when the slide bar is moved towards the card edge).
H
IGH
S
PEED
SRAM
Incorporated into the Discovery™ III system controller, the Compact CHAMP-AV IV provides
256 Kbytes of high-speed SRAM per processor node. While useful as a general purpose high-
performance memory area that offloads traffic to SDRAM, the SRAM is particularly beneficial
for holding descriptors for Discovery™ III peripheral devices, allowing DMA units to
simultaneously access data from SDRAM while descriptors are accessed from the SRAM.
PMC-X S
ITES
The Compact CHAMP-AV IV is equipped with two mezzanine sites compatible with the PCI
(PMC) and PCI-X (PMC-X) standards. The PMC-X interfaces support 64-bit, PCI-X100
transfers (100 MHz PCI-X) with a resulting peak rate of 800 MB/s. The board is backward
compatible with PCI-X66 (66 MHz PCI-X), PCI-66 (66 MHz conventional PCI) and PCI-33 (33
MHz conventional PCI). The interfaces are mapped to all five processor nodes allowing
transfers between any node and any interface. All four PMC interrupt signals may be routed
under software control to any of the processors, allowing the developer the choice of which
processor hosts the PMC control software.
PMC I/O is supported on both the front panel as well as the P3 and P5 backplane connectors.
The routing of I/O signals from PMC to P3 and P5 is arranged in differential pairs with careful
impedance control and matching of trace lengths. This technique supports the latest
generation of high performance digital interfaces included on some PMCs, such as the
StarLink switch fabric PMC, the PMC-643 Fibre Channel and the PMC-706 and PMC-708
Graphics PMCs. With a pair of StarLink PMCs, the Compact CHAMP-AV IV can act as a
combined StarFabric node and switch, with a massive 3.2 GB/sec of I/O (including switching
throughput) between the PMCs and the I/O connectors.
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