Datasheet

MSP430x461x1, MSP430x461x
MIXED SIGNAL MICROCONTROLLER
64
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
DV
SS
DV
SS
Pad Logic
DV
SS
D
EN
Module X IN
1
0
Module X OUT
P3OUT.x
Note: x = 0,1,2,3
P3.0/UCB0STE
P3.1/UCB0SIMO/UCB0SDA
P3.2/UCB0SOMI/UCB0SCL
P3.3/UCB0CLK
port P3 (P3.0 to P3.3) pin functions
PIN NAME (P3 X)
X
FUNCTION
CONTROL BITS / SIGNALS
PIN NAME (P3.X)
X FUNCTION
P3DIR.x P3SEL.x
P3.0/UCB0STE 0
P3.0 (I/O) I: 0; O: 1 0
UCB0STE (see Notes 1, 2) X 1
P3.1/UCB0SIMO/ 1
P3.1 (I/O) I: 0; O: 1 0
UCB0SDA
UCB0SIMO/UCB0SDA (see Notes 1, 2, 3) X 1
P3.2/UCB0SOMI/ 2
P3.2 (I/O) I: 0; O: 1 0
UCB0SCL
UCB0SOMI/UCB0SCL (see Notes 1, 2, 3) X 1
P3.3/UCB0CLK 3
P3.3 (I/O) I: 0; O: 1 0
UCB0CLK (see Notes 1, 2) X 1
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.