MSP430X20X1 Datasheet, PDF (66/80 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x20x1, MSP430x20x2, MSP430x20x3
MIXED SIGNAL MICROCONTROLLER
SLAS491A − AUGUST 2005 − REVISED OCTOBER 2005
APPLICATION INFORMATION, MSP430x20x3
Port P1 (P1.0 to P1.3) pin functions, MSP430x20x3
PIN NAME (P1.X) X
FUNCTION
P1DIR.x
CONTROL BITS / SIGNALS
P1SEL.x
SD16AE.x
INCHx
P1.0/TACLK/ACLK/A0+ 0 P1.0† Input/Output
0/1
0
0
N/A
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
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
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
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.
66
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265