Datasheet

MSP430F471x3, MSP430F471x6, MSP430F471x7
MIXED SIGNAL MICROCONTROLLER
SLAS626C -- OCTOBER 2008 -- REVISED MARCH 2011
65
POST OFFICE BOX 655303  DALLAS, TEXAS 75265
Port P3, P3.0 to P3.3, input/output with Schmitt trigger
Bus
Keeper
EN
Direction
0: Input
1: Output
P3SEL.x
1
0
P3DIR.x
P3IN.x
D
EN
Module X IN
1
0
Module X OUT
P3OUT.x
P3.0/UCB0STE/UCA0CLK
P3.1/UCB0SIMO/UCB0SDA
P3.2/UCB0SOMI/UCB0SCL
P3.3/UCB0CLK/UCA0STE
1
0
DVSS
DVCC
P3REN.x
Pad Logic
1
USCI Direction
Control
DVSS
Port P3 (P3.0 to P3.3) pin functions
P
I
N
N
A
M
E
(
P
3
X
)
X
F
U
N
C
T
I
O
N
CONTROL BITS / SIGNALS
PIN N
A
ME (P3.
X
)
X
FUNCTION
P3DIR.x P3SEL.x
P3.0/ 0
P3.0 (I/O) I: 0, O: 1 0
/
UCA0CLK/UCB0STE
UCA0CLK/UCB0STE (see Notes 1, 2, 3) X 1
P3.1/
U
C
B
0
S
I
M
O
/
1
P3.1 (I/O) I: 0, O: 1 0
U
C
B0
S
IM
O
/
UCB0SDA
UCB0SIMO/UCB0SDA (see Notes 1, 2, 4) X 1
P3.2/
U
C
B
0
S
O
M
I
/
2
P3.2 (I/O) I: 0, O: 1 0
U
C
B0
S
O
MI
/
UCB0SCL
UCB0SOMI/UCB0SCL (see Notes 1, 2, 4) X 1
P3.3/ 3
P3.3 (I/O) I: 0, O: 1 0
/
UCB0CLK/UCA0STE
UCB0CLK/UCA0STE (see Notes 1, 2, 5) 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.