Datasheet

MSP430x22x2, MSP430x22x4
MIXED SIGNAL MICROCONTROLLER
SLAS504B − JULY 2006 − REVISED JULY 2007
67
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
Port P2 pin schematic: P2.7, input/output with Schmitt trigger and crystal oscillator output
LFXT1 off
P2SEL.6
Bus
Keeper
EN
Direction
0: Input
1: Output
P2SEL.7
1
0
P2DIR.7
P2IN.7
P2IRQ.7
D
EN
Module X IN
1
0
Module X OUT
P2OUT.7
Interrupt
Edge
Select
Q
EN
Set
P2SEL.7
P2IES.7
P2IFG.7
P2IE.7
P2.7/XOUT
1
0
DVSS
DVCC
P2REN.7
Pad Logic
LFXT1 Oscillator
BCSCTL3.LFXT1Sx = 11
0
1
1
LFXT1CLK
From P2.6/XIN
P2.6/XIN
Port P2 (P2.7) pin functions
PIN NAME (P2 X)
X
FUNCTION
CONTROL BITS / SIGNALS
PIN NAME (P2.X)
X FUNCTION
P2DIR.x P2SEL.x
XOUT/P2.7 6 P2.7 (I/O) I: 0; O: 1 0
XOUT† (see Note 3) X 1
†
Default after reset (PUC/POR)
NOTES: 1. N/A: Not available or not applicable
2. X: Don’t care
3. If the pin XOUT/P2.7 is used as an input a current can flow until P2SEL.7 is cleared due to the oscillator output driver connection
to this pin after reset.