MSP430x22x2, MSP430x22x4
MIXED SIGNAL MICROCONTROLLER
SLAS504B − JULY 2006 − REVISED JULY 2007
64
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
Port P2 pin schematic: P2.4, input/output with Schmitt trigger
Bus
Keeper
EN
Direction
0: Input
1: Output
P2SEL.4
1
0
P2DIR.4
P2IN.4
P2IRQ.4
D
EN
Module X IN
1
0
Module X OUT
P2OUT.4
Interrupt
Edge
Select
Q
EN
Set
P2SEL.4
P2IES.4
P2IFG.4
P2IE.4
P2.4/TA2/
A4/VREF+/VeREF+/
OA1I0
1
0
DVSS
DVCC
P2REN.4
ADC10AE0.4
Pad Logic
INCHx = 4
To ADC10
1
To/from ADC10
positive reference
OA1
+
−
Port P2 (P2.4) pin functions
CONTROL BITS / SIGNALS
PIN NAME (P2.X)
X Y FUNCTION
P2DIR.x P2SEL.x ADC10AE0.y
P2.4/TA2/ 4 4 P2.4† (I/O) I: 0; O: 1 0 0
A4/V
REF+
/V
eREF+
/
Timer_A3.TA2 1 1 0
OA1I0
A4/V
REF+
/V
eREF+
/OA1I0 (see Note 3) X X 1
†
Default after reset (PUC/POR)
NOTES: 1. N/A: Not available or not applicable
2. X: Don’t care
3. Setting the ADC10AE0.y bit disables the output driver as well as the input schmitt trigger to prevent parasitic cross currents when
applying analog signals.
