Datasheet

MSP430F23x0
MIXED SIGNAL MICROCONTROLLER
SLAS518A -- AUGUST 2006 -- REVISED MAY 2007
53
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Port P3 pin schematic: P3.0 to P3.5, input/output with Schmitt-trigger
Direction
0: Input
1: Output
P3SEL.x
P3DIR.x
P3IN.x
D
EN
Module X IN
Module X OUT
P3OUT.x
DVSS
DVCC
Pad Logic
1
1
0
1
0
1
0
P3.0/UCB0STE/UCA0CLK
P3.1/UCB0SIMO/UCB0SDA
P3.2/UCB0SOMI/UCB0SCL
P3.3/UCB0CLK/UCA0STE
P3.4/UCA0TXD/UCA0SIMO
P3.5/UCA0RXD/UCA0SOMI
P3REN.x
Module
direction
Port P3.0 to P3.5 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/UCB0STE/ 0
P3.0 (I/O) I: 0; O: 1 0
/
/
UCA0CLK
UCB0STE/UCA0CLK (see Notes 1 and 2) X 1
P3.1/UCB0SIMO/ 1
P3.1 (I/O) I: 0; O: 1 0
/
/
UCB0SDA
UCB0SIMO/UCB0SDA (see Notes 1, 2 and 3) X 1
P3.2/UCB0SOMI/ 2
P3.2 (I/O) I: 0; O: 1 0
/
/
UCB0SCL
UCB0SOMI/UCB0SCL (see Notes 1, 2 and 3) X 1
P3.3/UCB0CLK/ 3
P3.3 (I/O) I: 0; O: 1 0
/
/
UCA0STE
UCB0CLK/UCA0STE (see Notes 1 and 2) X 1
P3.4/UCA0TXD/ 4
P3.4 (I/O) I: 0; O: 1 0
/
/
UCA0SIMO
UCA0TXD/UCA0SIMO (see Notes 1 and 2) X 1
P3.5/UCA0RXD/ 5
P3.5 (I/O) I: 0; O: 1 0
/
/
UCA0SOMI
UCA0RXD/UCA0SOMI (see Notes 1 and 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.