Datasheet

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
Direction
0: Input
1: Output
P9SEL.x
1
0
P9DIR.x
P9IN.x
EN
Module X IN
1
0
Module X OUT
P9OUT.x
1
0
DV
SS
DV
CC
P9REN.x
Pad Logic
1
P9DS.x
0: Low drive
1: High drive
D
MSP430F5438, MSP430F5437, MSP430F5436, MSP430F5435
MSP430F5419, MSP430F5418
SLAS612D –AUGUST 2009–REVISED AUGUST 2013 www.ti.com
Port P9, P9.0 to P9.7, Input/Output With Schmitt Trigger
Table 55. Port P9 (P9.0 to P9.7) Pin Functions
CONTROL BITS/SIGNALS
(1)
PIN NAME (P9.x) x FUNCTION
P9DIR.x P9SEL.x
P9.0/UCB2STE/UCA2CLK 0 P9.0 (I/O) I: 0; O: 1 0
UCB2STE/UCA2CLK
(2) (3)
X 1
P9.1/UCB2SIMO/UCB2SDA 1 P9.1 (I/O) I: 0; O: 1 0
UCB2SIMO/UCB2SDA
(2) (4)
X 1
P9.2/UCB2SOMI/UCB2SCL 2 P9.2 (I/O) I: 0; O: 1 0
UCB2SOMI/UCB2SCL
(2) (4)
X 1
P9.3/UCB2CLK/UCA2STE 3 P9.3 (I/O) I: 0; O: 1 0
UCB2CLK/UCA2STE
(2)
X 1
P9.4/UCA2TXD/UCA2SIMO 4 P9.4 (I/O) I: 0; O: 1 0
UCA2TXD/UCA2SIMO
(2)
X 1
P9.5/UCA2RXD/UCA2SOMI 5 P9.5 (I/O) I: 0; O: 1 0
UCA2RXD/UCA2SOMI
(2)
X 1
P9.6 6 P9.6 (I/O) I: 0; O: 1 0
P9.7 7 P9.7 (I/O) I: 0; O: 1 0
(1) X = Don't care
(2) The pin direction is controlled by the USCI module.
(3) UCB2CLK function takes precedence over UCA2STE function. If the pin is required as UCB2CLK input or output, USCI_A2 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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