M 5 2 2 2 1 D E M O U S E R G U I D E
J A N U A R Y 1 8 , 2 0 0 7
11
tection is not applied on this voltage input. The user must exercise caution when using the
terminal block to input power to the board.
Voltage supplied through connector J1 is also connected directly to the board voltage rails. No
protection is applied on this input and the user must exercise caution when powering the board
from connector J1.
CAUTION:
Input protection is
NOT
applied to the J1 or BATT power inputs. Excessive input
voltage or current will damage the board.
Power Jack
The PWR power jack consists of a 2.1mm, center-positive, barrel connector. Voltage applied
at this connector should range b6V and +15V.
Figure 2: PWR Jack
2.0mm – 2.1mm, center-positive, +V input
Input voltage: +6V to +15V
PWR
Terminal Block
The BATT terminal block is a 3.5mm, screw-type terminal block connected directly to the VDD
voltage rail. This allows the use of 2 AA batteries to supply power to the board. Exercise cau-
tion when using this input since input protection is not applied. This input requires a regulated
+3.3V voltage source.
Figure 3: TB1 Terminal Block
Accepts wire size 28AWG – 16AWG
Applied voltage must be +3.3V.
-
+
Connector J1
See the schematic for details on using this connection to supply power to the board or source
power from the board. This input requires a reg3.3V voltage source.
CAUTION:
Do not over drive either the J1 or TB1 inputs as damage to the board may result.
