MSP430F249-EP_14 Datasheet, PDF (70/82 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F249-EP
MIXED SIGNAL MICROCONTROLLER
2008
Port P5 pin schematic: P5.0 to P5.3, input/output with Schmitt trigger
Port P5.0 to P5.3 pin functions
PIN NAME (P5.X) X
FUNCTION
CONTROL BITS / SIGNALS
P5DIR.x
P5SEL.x
P5.0/UCB1STE^†/
UCA1CLK^†
0 P5.0 (I/O)
UCB1STE^†/UCA1CLK^† (see Notes 2 and 4)
I: 0; O: 1
0
X
1
P5.1/UCB1SIMO^†/
UCB1SDA^†
1 P5.1 (I/O)
UCB1SIMO^†/UCB1SDA^† (see Notes 2 and 3)
I: 0; O: 1
0
X
1
P5.2/UCB1SOMI^†/
UCB1SCL^†
2 P5.2 (I/O)
UCB1SOMI^†/UCB1SCL^† (see Notes 2 and 3)
I: 0; O: 1
0
X
1
P5.3/UCB1CLK^†/
UCA1STE^†
3 P5.3 (I/O)
UCB1CLK^†/UCA1STE^† (see Note 2)
I: 0; O: 1
0
X
1
† † _{MSP430F24x and MSP430F24x1 devices only}
NOTES: 1. X: Don’t care.
2. The pin direction is controlled by the USCI module.
3. In case the I2C functionality is selected the output drives only the logical 0 to V_SS level.
4. UCA01CLK function takes precedence over UCB1STE function. If the pin is required as UCA1CLK input or output USCI A/B1 will
be forced to 3−wire SPI mode if 4−wire SPI mode is selected.
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