Texas Instruments MSP430 User Manual

97
/*
* TA0CTL, Timer_A3 Control Register
*
* TASSEL_2 -- SMCLK
* ID_3 -- Divider - /8
* MC_2 -- Continuous Mode
*/
TA0CTL = TASSEL_2 | ID_3 | MC_2;
We want to blink the Launchpad board’s LEDs at the rate of 250 milliseconds. Thus, we need to check
or compare if the counter register TA0R has gone past 50% of the full scale 16-bit value. This is an
event marker because with reference to this mark, we toggle the states of the LEDs. The idea shown
here is actually the concept with which PWMs are generated by compare-match principle inside timer
hardware and so it is worth understanding this idea.
if(TA0R >= 32768)
{
P1OUT |= BIT6;
P1OUT &= ~BIT0;
}
else
{
P1OUT |= BIT0;
P1OUT &= ~BIT6;
}

Texas Instruments MSP430 Specifications

General

Program Memory Type	Flash
Clock Speed	Up to 25 MHz (depending on the specific device)
Flash Memory	Up to 512 KB (depending on the specific device)
RAM	Up to 66 KB (depending on the specific device)
Operating Voltage	1.8V - 3.6V (depending on the specific device)
ADC	10-bit or 12-bit SAR ADC
Communication Interfaces	UART, SPI, I2C, USB
DMA	Yes (depending on the specific device)
Operating Temperature	-40°C to +85°C
Architecture	16-bit RISC
Low Power Modes	Multiple (LPM0 to LPM4)