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MSP430x11x1
MIXED SIGNAL MICROCONTROLLER
SLAS241C – SEPTEMBER 1999 – REVISED JUNE 2000
37
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
input/output schematic
Port P1, P1.0 to P1.3, input/output with Schmitt-trigger
EN
D
(See Note 27)
(See Note 28)
(See Note 28)
(See Note 27)
GND
V
CC
P1.0 – P1.3
0
1
0
1
Interrupt
Edge
Select
EN
Set
Q
P1IE.x
P1IFG.x
P1IRQ.x
Interrupt
Flag
P1IES.x
P1SEL.x
Module X IN
P1IN.x
P1OUT.x
Module X OUT
Direction Control
From Module
P1DIR.x
P1SEL.x
Pad Logic
NOTE: x = Bit/identifier, 0 to 3 for port P1
PnSel.x PnDIR.x
Direction
control from
module
PnOUT.x Module X OUT PnIN.x Module X IN PnIE.x PnIFG.x PnIES.x
P1Sel.0 P1DIR.0 P1DIR.0 P1OUT.0 VSS P1IN.0 TACLK
†
P1IE.0 P1IFG.0 P1IES.0
P1Sel.1 P1DIR.1 P1DIR.1 P1OUT.1 Out0 signal
†
P1IN.1 CCI0A
†
P1IE.1 P1IFG.1 P1IES.1
P1Sel.2 P1DIR.2 P1DIR.2 P1OUT.2 Out1 signal
†
P1IN.2 CCI1A
†
P1IE.2 P1IFG.2 P1IES.2
P1Sel.3 P1DIR.3 P1DIR.3 P1OUT.3 Out2 signal
†
P1IN.3 CCI2A
†
P1IE.3 P1IFG.3 P1IES.3
†
Signal from or to 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).