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I2C Pin Mapping
AIR BoosterPack – User’s Manual
Release Date 11/2/12
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The example application preloaded in the MSP430 uses a software I2C controller on port
pins P2.3 and P2.4. For Stellaris applications utilizing a hardware I2C controller, JP106
and JP107 may be used to free up these two pins for other purposes. Both of these are
2-terminal jumpers that can accommodate a 0603 resistor. The BoosterPack is shipped
with a PCB trace making the connection by default. To break the connection, this trace
must be cut.
Table 13 - JP106 Jumper Settings (SDA)
LaunchPad MSP430
Jumper Position
Signal
Name
P2.3/
SDA
Signal
Name
Description
Closed
JP106
MSP430 P2.3 connected to J2-1 (default)
MSP430 P2.3 disconnected from J2-1
SDA
Open
Table 14 - JP107 Jumper Settings (SCL)
LaunchPad MSP430
Jumper Position
Signal
Name
P2.4/
SCL/
Signal
Name
Description
Closed
JP107
MSP430 P2.4 connected to J2-2 (default)
MSP430 P2.4 disconnected from J2-2
SCL
Open
LED3
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Miscellaneous
JP103 and JP104 are small solder jumpers intended for test purposes only. Do not
bridge the gap at these locations as the I2C signals (SCL, SDA) would be shorted
directly to GND, preventing normal operation of the I2C bus.
Table 15 – JP103 Jumper Settings
Radio
MCU
Signal
Name
Jumper Position Signal
Description
Name
Closed
Open
Reserved
Reserved (default)
JP103
TP23
SDA
Table 16 – JP104 Jumper Settings
Radio
MCU
Jumper Position Signal
Signal
Name
Description
Name
Closed
Open
Reserved
Reserved (default)
JP104
TP21
SCL
ANAREN [ ANAREN MICROWAVE ]
