MSP430F241X_11 Datasheet, PDF (82/107 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F241x, MSP430F261x
MIXED SIGNAL MICROCONTROLLER
SLAS541G -- JUNE 2007 -- REVISED MARCH 2011
Port P3 pin schematic: P3.0 to P3.7, input/output with Schmitt trigger
P3REN.x
P3DIR.x
0
Module
direction
1
Direction
0: Input
1: Output
DVSS 0
DVCC 1
Pad Logic
1
P3OUT.x
0
Module X OUT
1
P3SEL.x
P3IN.x
EN
Module X IN
D
P3.0/UCB0STE/UCA0CLK
P3.1/UCB0SIMO/UCB0SDA
P3.2/UCB0SOMI/UCB0SCL
P3.3/UCB0CLK/UCA0STE
P3.4/UCA0TXD/UCA0SIMO
P3.5/UCA0RXD/UCA0SOMI
P3.6/UCA1TXD/UCA1SIMO
P3.7/UCA1RXD/UCA1SOMI
Port P3.0 to P3.7 pin functions
PIN NAME (P3.X)
P3.0/UCB0STE/
UCA0CLK
X
FUNCTION
0 P3.0 (I/O)
UCB0STE/UCA0CLK (see Note 2 and 4)
CONTROL BITS / SIGNALS
P3DIR.x
P3SEL.x
I: 0; O: 1
0
X
1
P3.1/UCB0SIMO/
UCB0SDA
1 P3.1 (I/O)
UCB0SIMO/UCB0SDA (see Note 2 and 3)
I: 0; O: 1
0
X
1
P3.2/UCB0SOMI/
UCB0SCL
2 P3.2 (I/O)
UCB0SOMI/UCB0SCL (see Note 2 and 3)
I: 0; O: 1
0
X
1
P3.3/UCB0CLK/
UCA0STE
3 P3.3 (I/O)
UCB0CLK/UCA0STE (see Note 2)
I: 0; O: 1
0
X
1
P3.4/UCA0TXD/
UCA0SIMO
4 P3.4 (I/O)
UCA0TXD/UCA0SIMO (see Note 2)
I: 0; O: 1
0
X
1
P3.5/UCA0RXD/
UCA0SOMI
5 P3.5 (I/O)
UCA0RXD/UCA0SOMI (see Note 2)
I: 0; O: 1
0
X
1
P3.6/UCA1TXD/
UCA1SIMO
6 P3.6 (I/O)
UCA1TXD/UCA1SIMO (see Note 2)
I: 0; O: 1
0
X
1
P3.7/UCA1RXD/
UCA1SOMI
7 P3.7 (I/O)
UCA1RXD/UCA1SOMI (see Note 2)
I: 0; O: 1
0
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.
4. UCA0CLK function takes precedence over UCB0STE function. If the pin is required as UCA0CLK input or output, USCI A0/B0 is
forced to 3-wire SPI mode if 4-wire SPI mode is selected.
82
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