Datasheet

MSP430x461x1, MSP430x461x
MIXED SIGNAL MICROCONTROLLER
66
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
port P4, P4.0 to P4.1, input/output with Schmitt trigger
Bus
Keeper
EN
Direction
0: Input
1: Output
P4SEL.x
1
0
P4DIR.x
P4IN.x
DV
SS
DV
SS
Pad Logic
DV
SS
D
EN
Module X IN
1
0
Module X OUT
P4OUT.x
Note: x = 0,1
P4.1/URXD1
P4.0/UTXD1
Direction control
from Module X
port P4 (P4.0 to P4.1) pin functions
PIN NAME (P4 X)
X
FUNCTION
CONTROL BITS / SIGNALS
PIN NAME (P4.X)
X FUNCTION
P4DIR.x P4SEL.x
P4.0/UTXD1 0
P4.0 (I/O) I: 0; O: 1 0
USART1.UTXD1 (see Notes 1, 2) X 1
P4.1/URXD1 1
P4.1 (I/O) I: 0; O: 1 0
USART1.URXD1 (see Notes 1, 2) X 1
NOTES: 1. X: Don’t care.
2. When in USART1 mode, P4.0 is set to output, P4.1 is set to input.