■■■■■■■■ Beagle Bone Black ■■■■■■■■
最新 Revision C (Pending)
This revision increases the eMMC from 2GB to 4GB. We are making this change for several reasons:
1) Complaints from the community about lack of space left in the eMMC.
2) For those worried about their eMMC wearing out, the added space will help in the area of moving the data around to prevent wear out. Assuming of course you don't try and use it all.
3) Concerns over the long-term availability of the 2GB device. 4GB is currently the low end of the offering. This also gives us two sources.
We are planning a price increase for the Rev C somewhere between $5 and $15. We are working to figure out where it needs to be. This is for several reasons:
1) To cover the increased cost of the 4G devices.
2) Currently there is $0 margin on these boards which limits our ability to bring more manufacturing capacity on line. Added some margin allows us to find more capacity.
3) Without margin, we cannot respond to component price increases due to market forces. This is of particular concern in the area of NAND and DDR3. We have been successful in fighting back some increases, but we don't know if that will continue.
We plan to start production on this revision in 4-5 weeks. We will continue to build and ship the Rev B boards until then.
Revision B (Production Version)
This version moves to the AM3358BZCZ100 processor as we are no longer able to get the limited production version of the AM3359AZCZ100.
No changes in features or operation of the board resulted from this change.
No changes in features or operation of the board.
1) Added optional zero ohm resistor to tie GND_OSC1 to system ground.
2) Changed C106 to a 1uF capacitor.
3) Changed C24 to a 2.2uF capacitor. This extends the reset signal to solve an issue where some boards would not boot on power up.
4) Removed R9 and installed R8. This change was based on an alert we just received from TI that there is a power sequencing issue with the TPS65217C power management IC and the power sequencing is incorrect. This change connects the VDDS rail to the VRTC rail. We do not believe at this time, that the issue is causing any issues with the boards, but we want to comply with the directive.
As of May 12, 2014 the BBB comes with Debian Linux w/the 3.8.13-bone kernel
Processor: Sitara AM3359AZCZ100 1GHz, 2000 MIPS
Graphics Engine: SGX530 3D, 20M Polygons/S
SDRAM Memory: 512MB DDR3L 606MHZ
Onboard Flash: 4GB, 8bit Embedded MMC
PMIC: TPS65217C PMIC regulator and one additional LDO.
Debug Support: Optional Onboard 20-pin CTI JTAG, Serial Header
Power Source: miniUSB USB or DC Jack, 5VDC External Via Expansion Header
PCB: 86.44mm x 54.54mm / 3.4” x 2.15” 6 layers
88.98mm x 54.54mm x 15.41mm / 3.5" x 2.15" x 0.6"
Indicators 1-Power, 2-Ethernet, 4-User Controllable LEDs
HiSpeed USB 2.0 Client Port: Access to USB0, Client mode via miniUSB
HiSpeed USB 2.0 Host Port Access to USB1, Type A Socket, 500mA LS/FS/HS
Serial Port UART0 access via 6 pin 3.3V TTL Header. Header is populated
Ethernet 10/100, RJ45
SD/MMC Connector microSD , 3.3V
User Input: Reset Button, Boot Button, Power Button
Video Out: 16b HDMI, 1280x1024 (MAX), 1024x768,1280x720,1440x900 w/EDID