MSP430X47X3_07 Datasheet, PDF (58/76 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x47x3, MSP430x47x4
MIXED SIGNAL MICROCONTROLLER
SLAS545A − MAY 2007 − REVISED DECEMBER 2007
port P3, P3.0 to P3.3, input/output with Schmitt-trigger
P3REN.x
DVSS
Pad Logic
P3DIR.x
0
USCI Direction
1
Control
P3OUT.x
0
Module X OUT
1
P3SEL.x
P3IN.x
EN
Module X IN
D
Direction
0: Input
1: Output
DVSS 0
DVCC 1
1
Bus
Keeper
EN
P3.0/UCB0STE/UCA0CLK
P3.1/UCB0SIMO/UCB0SDA
P3.2/UCB0SOMI/UCB0SCL
P3.3/UCB0CLK/UCA0STE
Port P3 (P3.0 to P3.3) pin functions
PIN NAME (P3.X)
X
FUNCTION
CONTROL BITS / SIGNALS
P3DIR.x
P3SEL.x
P3.0/
UCA0CLK/UCB0STE
0 P3.0 (I/O)
UCA0CLK/UCB0STE (see Notes 1, 2, 3)
I: 0; O: 1
0
X
1
P3.1/
UCB0SIMO/
UCB0SDA
1 _{P3.1 (I/O)}
UCB0SIMO/UCB0SDA (see Notes 1, 2, 4)
I: 0; O: 1
0
X
1
P3.2/
UCB0SOMI/
UCB0SCL
2 _{P3.2 (I/O)}
UCB0SOMI/UCB0SCL (see Notes 1, 2, 4)
I: 0; O: 1
0
X
1
P3.3/
UCB0CLK/UCA0STE
3 P3.3 (I/O)
UCB0CLK (see Notes 1, 2, 5)
I: 0; O: 1
0
X
1
NOTES:
1. X: Don’t care.
2. The pin direction is controlled by the USCI module.
3. UCA0CLK function takes precedence over UCB0STE function. If the pin is required as UCA0CLK input or output USCI_B0 will be
forced to 3-wire SPI mode even if 4-wire SPI mode is selected.
4. In case the I2C functionality is selected the output drives only the logical 0 to V_SS level.
5. UCB0CLK function takes precedence over UCA0STE function. If the pin is required as UCB0CLK input or output USCI_A0 will be
forced to 3-wire SPI mode even if 4-wire SPI mode is selected.
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