MSP430-INTERNAL PULL DOWN

Digital input with INTERNAL PULL DOWN in “P1.4”

.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