Digital input with INTERNAL PULL DOWN in “P1.4”
.include "msp430g2x31.inc"
.include "msp430g2x31.inc"
org 0xf800
mov.w #(WDTPW|WDTHOLD), &WDTCTL
mov.b #0x10, P1REN
CLR.B P1OUT
CLR R5
mov.b #0x1, &P1DIR
L1: MOV.b &P1IN, r5
AND.b #0x10,r5
tst r5
JZ L1
mov.b #0x41, &P1OUT
L3: jmp L3
org 0xfffe
dw 0xf800