Datasheet

P3.0/UB0STE/UCA0CLK
P3.1/UCB0SIMO/UCB0SDA
P3.2/UCB0SOMI/UCB0SCL
P3.3/USC0CLK/UCA0STE
P3.4/UCA0TXD/UCA0SIMO
P3.5/UCA0RXD/UCA0SOMI
P3.6/UCB1STE/UCA1CLK
P3.7/UCB1SIMO/UCB1SDA
Direction
0: Input
1: Output
P3SEL.x
1
0
P3DIR.x
P3IN.x
EN
Module X IN
1
0
Module X OUT
P3OUT.x
1
0
DV
SS
DV
CC
P3REN.x
Pad Logic
1
P3DS.x
0: Low drive
1: High drive
D
MSP430F5438A, MSP430F5437A, MSP430F5436A, MSP430F5435A
MSP430F5419A, MSP430F5418A
SLAS655D –JANUARY 2010–REVISED AUGUST 2013 www.ti.com
Port P3, P3.0 to P3.7, Input/Output With Schmitt Trigger
Table 46. Port P3 (P3.0 to P3.7) Pin Functions
CONTROL BITS/SIGNALS
(1)
PIN NAME (P3.x) x FUNCTION
P3DIR.x P3SEL.x
P3.0/UCB0STE/UCA0CLK 0 P3.0 (I/O) I: 0; O: 1 0
UCB0STE/UCA0CLK
(2) (3)
X 1
P3.1/UCB0SIMO/UCB0SDA 1 P3.1 (I/O) I: 0; O: 1 0
UCB0SIMO/UCB0SDA
(2) (4)
X 1
P3.2/UCB0SOMI/UCB0SCL 2 P3.2 (I/O) I: 0; O: 1 0
UCB0SOMI/UCB0SCL
(2) (4)
X 1
P3.3/UCB0CLK/UCA0STE 3 P3.3 (I/O) I: 0; O: 1 0
UCB0CLK/UCA0STE
(2) (5)
X 1
P3.4/UCA0TXD/UCA0SIMO 4 P3.4 (I/O) I: 0; O: 1 0
UCA0TXD/UCA0SIMO
(2)
X 1
P3.5/UCA0RXD/UCA0SOMI 5 P3.5 (I/O) I: 0; O: 1 0
UCA0RXD/UCA0SOMI
(2)
X 1
P3.6/UCB1STE/UCA1CLK 6 P3.6 (I/O) I: 0; O: 1 0
UCB1STE/UCA1CLK
(2) (6)
X 1
P3.7/UCB1SIMO/UCB1SDA 7 P3.7 (I/O) I: 0; O: 1 0
UCB1SIMO/UCB1SDA
(2) (4)
X 1
(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 is forced to
3-wire SPI mode if 4-wire SPI mode is selected.
(4) If 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 is forced to
3-wire SPI mode if 4-wire SPI mode is selected.
(6) UCA1CLK function takes precedence over UCB1STE function. If the pin is required as UCA1CLK input or output, USCI_B1 is forced to
3-wire SPI mode if 4-wire SPI mode is selected.
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