Texas Instruments MSP430x4xx - Manual (Page 208)

Basic Timer1 Introduction
11-8 Basic Timer1
BTCNT1, Basic Timer1 Counter 1
7 6 5 4 3 2 1 0
BTCNT1x
rw rw rw rw rw rw rw rw
BTCNT1x Bits
7−0 BTCNT1 register. The BTCNT1 register is the count of BTCNT1.
BTCNT2, Basic Timer1 Counter 2
7 6 5 4 3 2 1 0
BTCNT2x
rw rw rw rw rw rw rw rw
BTCNT2x Bits
7−0 BTCNT2 register. The BTCNT2 register is the count of BTCNT2.