BeagleBoard XM C2, Reference Manual

Page: 66 / 163

REF: BB_SRM_xM
BeagleBoard-xM System
Reference Manual
Revision C2
Page 66 of 163
7.10.1 Overview
The DM3730 is a high-performance, multimedia application device and is integrated onto
TI's advanced 45-nm process technology. The processor architecture is configured with
different sets of features in different tier devices. Some features are not available in the
lower-tier devices. For more information, refer to the Technical Reference Manual
(TRM).The architecture is designed to provide best-in-class video, image, and graphics
processing sufficient to various applications.
The processor supports high-level operating systems (OSs), such as:
o
Windows CE
o
Linux
o
QNX
o
Symbian
o
Others
This processor device includes state-of-the-art power-management techniques required
for high-performance low power products. The DM3730 supports the following functions
and interfaces on the BeagleBoard:
o
Microprocessor unit (MPU) subsystem based on the ARM Cortex-A8™
microprocessor
o
POP Memory interface
o
4Gb MDDR (512Mbytes)
o
24 Bit RGB Display interface (DSS)
o
SD/MMC interface
o
USB OTG interface
o
NTSC/PAL/S-Video output
o
Power management
o
Serial interface
o
I
2
C interface
o
I
2
S Audio interface (McBSP2)
o
Expansion McBSP1
o
JTAG debugging interface
7.10.2 SDRAM Bus
The SDRAM bus is not accessible on the BeagleBoard. Its connectivity is limited to the
POP memory access on the top of the processor and therefore is only accessible by the
SDRAM memory. The base address for the DDR SDRAM in the POP device is
0x8000
0000 .
If you look at the –xM schematic, you will notice on page 3 there are a lot of signals
labeled NA0…65. These pins are located on the bottom of the processor. In the Rev