BeagleBoard XM C2, Справочное руководство

Страница: 22 / 163

REF: BB_SRM_xM
BeagleBoard-xM System
Reference Manual
Revision C2
Page 22 of 163
The following sections provide more detail on each feature and sections of the
BeagleBoard.
4.2 Processor
The BeagleBoard-xM processor is the DM3730CBP 1GHz version and comes in a .4mm
pitch POP package. POP (Package on Package) is a technique where the memory is
mounted on top of the processor. For this reason, when looking at the BeagleBoard, you
will not find an actual part labeled DM3730CBP, but instead see the part number for the
memory.
4.3 Memory
There are two possible memory devices used on the –xM. The -00 assembly uses the
Micron POP memory and the -01 uses the Numonyx POP memory. The key function of
the POP memory is to provide:
o
4Gb MDDR SDRAM x32 (512MB @ 166MHz)
Unlike with earlier versions of the board, no other memory devices are on the
BeagleBoard. It is possible however, that additional non volatile memory storage can be
added to BeagleBoard by:
o
Accessing the memory on the uSD card
o
Use the USB OTG port and a powered USB hub to drive a USB Thumb drive or
hard drive.
o
Install a thumbdrive into one of the USB ports
o
Add a USB to Hard Disk adapter to one of the USB ports
Support for these devices is dependent upon driver support in the OS.
4.4 Power Management
The TPS65950 is used on the BeagleBoard to provide power with the exception of a 3.3V
regulator which is used to provide power to the DVI-D encoder and RS232 driver and an
additional 3.3V regulator to power the USB Hub. In addition to the power the TPS65950
also provides:
o
Stereo Audio Out
o
Stereo Audio in
o
Power on reset
o
USB OTG PHY
o
Status LED