Table 6-20 Port P1 (P1.0 to P1.3) Pin Functions
| PIN NAME (P1.x) |
x |
FUNCTION |
CONTROL BITS AND SIGNALS (1) |
| P1DIR.x |
P1SEL1.x |
P1SEL0.x |
| P1.0/TA0.1/DMAE0/RTCCLK/A0/C0/ VREF-/VeREF- |
0 |
P1.0 (I/O) |
I: 0; O: 1 |
0 |
0 |
| TA0.CCI1A |
0 |
0 |
1 |
| TA0.1 |
1 |
| DMAE0 |
0 |
1 |
0 |
| RTCCLK(6) |
1 |
| A0, C0, VREF-, VeREF- (4)(5) |
X |
1 |
1 |
| P1.1/TA0.2/TA1CLK/COUT/A1/C1/ VREF+/VeREF+ |
1 |
P1.1 (I/O) |
I: 0; O: 1 |
0 |
0 |
| TA0.CCI2A |
0 |
0 |
1 |
| TA0.2 |
1 |
| TA1CLK |
0 |
1 |
0 |
| COUT(7) |
1 |
| A1, C1, VREF+, VeREF+ (4)(5) |
X |
1 |
1 |
| P1.2/TA1.1/TA0CLK/COUT/A2/C2 |
2 |
P1.2 (I/O) |
I: 0; O: 1 |
0 |
0 |
| TA1.CCI1A |
0 |
0 |
1 |
| TA1.1 |
1 |
| TA0CLK |
0 |
1 |
0 |
| COUT(8) |
1 |
| A2, C2 (4)(5) |
X |
1 |
1 |
| P1.3/TA1.2/A3/C3 |
3 |
P1.3 (I/O) |
I: 0; O: 1 |
0 |
0 |
| TA1.CCI2A |
0 |
0 |
1 |
| TA1.2 |
1 |
| N/A |
0 |
1 |
0 |
|
1 |
| A3, C3 (4)(5) |
X |
1 |
1 |
(1) X = Don't care
(2) Direction controlled by eUSCI_B0 module.
(3) Direction controlled by eUSCI_A0 module.
(4) Setting P1SEL1.x and P1SEL0.x disables the output driver and the input Schmitt trigger to prevent parasitic cross currents when applying analog signals.
(5) Setting the CEPD.x bit of the comparator disables the output driver and the input Schmitt trigger to prevent parasitic cross currents when applying analog signals. Selecting the Cx input pin to the comparator multiplexer with the input select bits in the comparator module automatically disables output driver and input buffer for that pin, regardless of the state of the associated CEPD.x bit.
(6) Do not use this pin as RTCCLK output if the DMAE0 functionality is used on any other pin. Select an alternative RTCCLK output pin.
(7) Do not use this pin as COUT output if the TA1CLK functionality is used on any other pin. Select an alternative COUT output pin.
(8) Do not use this pin as COUT output if the TA0CLK functionality is used on any other pin. Select an alternative COUT output pin.