Datasheet

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  
SLAS491A − AUGUST 2005 − REVISED OCTOBER 2005
66
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION, MSP430x20x3
Port P1 (P1.0 to P1.3) pin functions, MSP430x20x3
PIN NAME (P1.X)
X
FUNCTION
CONTROL BITS / SIGNALS
PIN NAME (P1.X)
X
FUNCTION
P1DIR.x P1SEL.x SD16AE.x INCHx
P1.0/TACLK/ACLK/A0+
0
P1.0† Input/Output 0/1 0 0 N/A
P1.0/TACLK/ACLK/A0+
0
Timer_A2.TACLK/INCLK 0 1 0 N/A
ACLK 1 1 0 N/A
A0+ (see Note 3) X X 1 0
P1.1/TA0/A0−/A4+
1
P1.1† Input/Output 0/1 0 0 N/A
P1.1/TA0/A0−/A4+
1
Timer_A2.CCI0A 0 1 0 N/A
Timer_A2.TA0 1 1 0 N/A
A0− (see Notes 3, 4) X X 1 0
A4+ (see Note 3) X X 1 4
P1.2/TA1/A1+/A4−
2
P1.2† Input/Output 0/1 0 0 N/A
P1.2/TA1/A1+/A4−
2
Timer_A2.CCI1A 0 1 0 N/A
Timer_A2.TA1 1 1 0 N/A
A1+ (see Note 3) X X 1 1
A4− (see Notes 3, 4) X X 1 4
P1.3/VREF/A1−
3
P1.3† Input/Output 0/1 0 0 N/A
P1.3/VREF/A1−
3
VREF X 1 0 N/A
A1− (see Notes 3, 4) X X 1 1
†
Default after reset (PUC/POR)
NOTES: 1. N/A: Not available or not applicable.
2. X: Don’t care.
3. Setting the SD16AE.x bit disables the output driver as well as the input schmitt trigger to prevent parasitic cross currents when
applying analog signals.
4. With SD16AE.x = 0 the negative inputs are connected to VSS if the corresponding input is selected.