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MSP430x11x1
MIXED SIGNAL MICROCONTROLLER
SLAS241C – SEPTEMBER 1999 – REVISED JUNE 2000
40
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
Port P2, P2.3 to P2.4, input/output with Schmitt-trigger
EN
D
See Note 27
See Note 28
See Note 28
See Note 27
GND
V
CC
P2.3
0
1
0
1
Interrupt
Edge
Select
EN
Set
Q
P2IE.3
P2IFG.3
P2IRQ.3
Interrupt
Flag
P2IES.3 P2SEL.3
Module X IN
P2IN.3
P2OUT.3
Module X
OUT
Direction Control
From Module
P2DIR.3
P2SEL.3
Pad Logic
0: Input
1: Output
Bus Keeper
CAPD.3
EN
D
See Note 27
See Note 28
See Note 28
See Note 27
P2.4
1
0
1
0
Interrupt
Edge
Select
EN
Set
Q
P2IE.4
P2IFG.4
P2IRQ.4
Interrupt
Flag
P2IES.4
P2SEL.4
Module X IN
P2IN.4
P2OUT.4
Module X OUT
Direction Control
From Module
P2DIR.4
P2SEL.4
Pad Logic
0: Input
1: Output
Bus Keeper
CAPD.4
_
+
Comparator_A
Reference Block
CAREF
CAREF CAEXP2CA
CAF
CCI1B
0 V
V
CC
GND
APPLICATION INFORMATION
PnSel.x PnDIR.x Direction
control from module
PnOUT.x Module X OUT PnIN.x Module X IN PnIE.x PnIFG.x PnIES.x
P2Sel.3 P2DIR.3 P2DIR.3 P2OUT.3 Out1 signal
†
P2IN.3 unused P2IE.3 P2IFG.3 P1IES.3
P2Sel.4 P2DIR.4 P2DIR.4 P2OUT.4 Out2 signal
†
P2IN.4 unused P2IE.4 P2IFG.4 P1IES.4
†
Signal from Timer_A
NOTES: 27. Optional selection of pullup or pulldown resistors with ROM (masked) versions.
28. Fuses for optional pullup and pulldown resistors can only be programmed at the factory (ROM versions only).