MSP430F2274-EP_1 Datasheet, PDF (62/77 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F2274-EP
SLAS614C – SEPTEMBER 2008 – REVISED JULY 2010
Port P3 Pin Schematic: P3.1 to P3.5, Input/Output With Schmitt Trigger
P3REN.x
DVSS
Pad Logic
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P3DIR.x
USCI Direction
Control
P3OUT.x
Module X OUT
P3SEL.x
P3IN.x
Module X IN
0
1
0
1
EN
D
Direction
0: Input
1: Output
DVSS 0
DVCC 1
1
Bus
Keeper
EN
P3.1/UC1SIMO/UC1SCL
P3.2/UC1SOMI/UC1SDA
P3.3/UC1CLK/UC0STE
P3.4/UC0TXD/UC0SIMO
P3.5/UC0RXD/UC0SOMI
Port P3 (P3.1 to P3.5) Pin Functions
PIN NAME (P3.X)
P3.1/UC1SIMO/UC1SDA
P3.2/UC1SOMI/UC1SCL
P3.3/UC1CLK/UC0STE
P3.4/UC0TXD/UC0SIMO
P3.5/UC0RXD/UC0SOMI
X
FUNCTION ⁽¹⁾
P3.1⁽³⁾ (I/O)
1 _{UC1SIMO/UC1SDA(4)}
P3.2⁽⁵⁾ (I/O)
1 _{UC1SOMI/UC1SCL(6)}
P3.3⁽⁵⁾ (I/O)
1
UC1CLK/UC0STE^{(6) (7)}
P3.4⁽⁵⁾ (I/O)
1 _{UC0TXD/UC0SIMO(6)}
P3.5⁽⁵⁾ (I/O)
1 _{UC0RXD/UC0SOMI(6)}
CONTROL BITS/SIGNALS⁽²⁾
P3DIR.x
P3SEL.x
I: 0; O: 1
0
X
1
I: 0; O: 1
0
X
1
I: 0; O: 1
0
X
1
I: 0; O: 1
0
X
1
I: 0; O: 1
0
X
1
(1) N/A: Not available or not applicable
(2) X: Don't care
(3) Default after reset (PUC/POR)
(4) The pin direction is controlled by the USCI module.
(5) Default after reset (PUC/POR)
(6) The pin direction is controlled by the USCI module.
(7) UC1CLK function takes precedence over UC0STE function. If the pin is required as UC1CLK input or output, USCI0 is orced to 3-wire
SPI mode even if 4-wire SPI mode is selected.
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