Datasheet

MSP430F47x3, MSP430F47x4
MIXED SIGNAL MICROCONTROLLER
SLAS545C − MAY 2007 − REVISED MARCH 2011
61
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
port P4, P4.2 to P4.5, input/output with Schmitt trigger
Bus
Keeper
EN
Direction
0: Input
1: Output
P4SEL.x
1
0
P4DIR.x
P4IN.x
D
EN
Module X IN
1
0
Module X OUT
P4OUT.x
P4.2/UCB1STE/UCA1CLK/S39
P4.3/UCB1SIMO/UCB1SDA/S38
P4.4/UCB1SOMI/UCB1SCL/S37
P4.5/UCB1CLK/UCA1STE/S36
1
0
DVSS
DVCC
P4REN.x
Pad Logic
LCDS...
Segment Sz
1
USCI Direction
Control
Port P4 (P4.2 to P4.5) pin functions
PIN NAME (P4 X)
X
FUNCTION
CONTROL BITS / SIGNALS
PIN NAME (P4.X)
X FUNCTION
P4DIR.x P4SEL.x LCDS36
P4.2/ 2
P4.2 (I/O) I: 0, O: 1 0 0
UCA1CLK/UCB1STE/
S39
UCA1CLK/UCB1STE (see Notes 2, 3) X 1 0
S39
S39 X X 1
P4.3/ 3
P4.3 (I/O) I: 0, O: 1 0 0
UCB1SIMO/UCB1SDA/
S38
UCB1SIMO/UCB1SDA (see Notes 2, 4) X 1 0
S38
S38 X X 1
P4.4/ 4
P4.4 (I/O) I: 0, O: 1 0 0
UCB1SOMI/UCB1SCL/
S37
UCB1SOMI/UCB1SCL (see Notes 2, 4) X 1 0
S37
S37 X X 1
P4.5/ 5
P4.5 (I/O) I: 0, O: 1 0 0
UCB1CLK/UCA1STE/
S36
UCB1CLK/UCA1STE (see Notes 2, 5) X 1 0
S36
S36 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.