MSP430X47X3_07 Datasheet, PDF (61/76 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

port P4, P4.2 to P4.5, input/output with Schmitt-trigger
Segment Sz
LCDS...
MSP430x47x3, MSP430x47x4
MIXED SIGNAL MICROCONTROLLER
SLAS545A − MAY 2007 − REVISED DECEMBER 2007
Pad Logic
P4REN.x
P4DIR.x
0
USCI Direction
Control
1
P4OUT.x
0
Module X OUT
1
P4SEL.x
P4IN.x
EN
Module X IN
D
Direction
0: Input
1: Output
DVSS 0
DVCC 1
1
Bus
Keeper
EN
P4.2/UCB1STE/UCA1CLK/S39
P4.3/UCB1SIMO/UCB1SDA/S38
P4.4/UCB1SOMI/UCB1SCL/S37
P4.5/UCB1CLK/UCA1STE/S36
Port P4 (P4.2 to P4.5) pin functions
PIN NAME (P4.X)
X
FUNCTION
CONTROL BITS / SIGNALS
P4DIR.x
P4SEL.x
LCDS36
P4.2/
UCA1CLK/UCB1STE/
S39
2 P4.2 (I/O)
UCA1CLK/UCB1STE (see Notes 2, 3)
S39
I: 0; O: 1
0
0
X
1
0
X
X
1
P4.3/
3 P4.3 (I/O)
UCB1SIMO/UCB1SDA/
S38
UCB1SIMO/UCB1SDA (see Notes 2, 4)
S38
I: 0; O: 1
0
0
X
1
0
X
X
1
P4.4/
4 P4.4 (I/O)
UCB1SOMI/UCB1SCL/
S37
UCB1SOMI/UCB1SCL (see Notes 2, 4)
S37
I: 0; O: 1
0
0
X
1
0
X
X
1
P4.5/
UCB1CLK/UCA1STE/
S36
5 P4.5 (I/O)
UCB1CLK/UCA1STE (see Notes 2, 5)
S36
I: 0; O: 1
0
0
X
1
0
X
X
1
NOTES:
1. X: Don’t care.
2. The pin direction is controlled by the USCI module.
3. UCA1CLK function takes precedence over UCB1STE function. If the pin is required as UCA1CLK input or output USCI_B1 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. UCB1CLK function takes precedence over UCA1STE function. If the pin is required as UCB1CLK input or output USCI_A1 will be
forced to 3-wire SPI mode even if 4-wire SPI mode is selected.
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