MSP430F543X_10 Datasheet, PDF (83/99 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

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Port P9, P9.0 to P9.7, Input/Output With Schmitt Trigger
P9REN.x
MSP430F543x, MSP430F541x
SLAS612C – AUGUST 2009 – REVISED MARCH 2010
Pad Logic
P9DIR.x
P9OUT.x
Module X OUT
P9SEL.x
P9IN.x
Module X IN
0
1
0
1
EN
D
Direction
0: Input
1: Output
DV_SS
0
DV_CC
1
1
P9DS.x
0: Low drive
1: High drive
P9.0/UCB2STE/UCA2CLK
P9.1/UCB2SIMO/UCB2SDA
P9.2/UCB2SOMI/UCB2SCL
P9.3/UCB2CLK/UCA2STE
P9.4/UCA2TXD/UCA2SIMO
P9.5/UCA2RXD/UCA2SOMI
P9.6
P9.7
Table 54. Port P9 (P9.0 to P9.7) Pin Functions
PIN NAME (P9.x)
x
FUNCTION
P9.0/UCB2STE/UCA2CLK
P9.1/UCB2SIMO/UCB2SDA
P9.2/UCB2SOMI/UCB2SCL
P9.3/UCB2CLK/UCA2STE
P9.4/UCA2TXD/UCA2SIMO
P9.5/UCA2RXD/UCA2SOMI
P9.6
P9.7
0 P9.0 (I/O)
UCB2STE/UCA2CLK^{(2) (3)}
1 P9.1 (I/O)
UCB2SIMO/UCB2SDA^{(2) (4)}
2 P9.2 (I/O)
UCB2SOMI/UCB2SCL^{(2) (4)}
3 P9.3 (I/O)
UCB2CLK/UCA2STE ⁽²⁾
4 P9.4 (I/O)
UCA2TXD/UCA2SIMO ⁽²⁾
5 P9.5 (I/O)
UCA2RXD/UCA2SOMI ⁽²⁾
6 P9.6 (I/O)
7 P9.7 (I/O)
CONTROL BITS/SIGNALS⁽¹⁾
P9DIR.x
P9SEL.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
I: 0; O: 1
0
X
1
I: 0; O: 1
0
I: 0; O: 1
0
(1) X = Don't care
(2) The pin direction is controlled by the USCI module.
(3) UCA2CLK function takes precedence over UCB2STE function. If the pin is required as UCA2CLK input or output, USCI A2/B2 is forced
to 3-wire SPI mode if 4-wire SPI mode is selected.
(4) If the I2C functionality is selected, the output drives only the logical 0 to V_SS level.
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