JAJS280O October 2003 – March 2019 TMS320F2801 , TMS320F28015 , TMS320F28016 , TMS320F2802 , TMS320F2806 , TMS320F2808 , TMS320F2809
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There are three 32-bit CPU-timers on the 280x devices (CPU-TIMER0/1/2).
CPU-Timer 0 and CPU-Timer 1 can be used in user applications. Timer 2 is reserved for SYS/BIOS. These timers are different from the timers that are present in the ePWM modules.
NOTE
If the application is not using SYS/BIOS, then CPU-Timer 2 can be used in the application.
In the 280x devices, the timer interrupt signals (TINT0, TINT1, TINT2) are connected as shown in Figure 6-2.
The general operation of the timer is as follows: The 32-bit counter register "TIMH:TIM" is loaded with the value in the period register "PRDH:PRD". The counter register decrements at the SYSCLKOUT rate of the C28x. When the counter reaches 0, a timer interrupt output signal generates an interrupt pulse. The registers listed in Table 6-2 are used to configure the timers. For more information, see the TMS320x280x, 2801x, 2804x DSP system control and interrupts reference guide.
NAME | ADDRESS | SIZE (x16) | DESCRIPTION |
---|---|---|---|
TIMER0TIM | 0x0C00 | 1 | CPU-Timer 0, Counter Register |
TIMER0TIMH | 0x0C01 | 1 | CPU-Timer 0, Counter Register High |
TIMER0PRD | 0x0C02 | 1 | CPU-Timer 0, Period Register |
TIMER0PRDH | 0x0C03 | 1 | CPU-Timer 0, Period Register High |
TIMER0TCR | 0x0C04 | 1 | CPU-Timer 0, Control Register |
Reserved | 0x0C05 | 1 | Reserved |
TIMER0TPR | 0x0C06 | 1 | CPU-Timer 0, Prescale Register |
TIMER0TPRH | 0x0C07 | 1 | CPU-Timer 0, Prescale Register High |
TIMER1TIM | 0x0C08 | 1 | CPU-Timer 1, Counter Register |
TIMER1TIMH | 0x0C09 | 1 | CPU-Timer 1, Counter Register High |
TIMER1PRD | 0x0C0A | 1 | CPU-Timer 1, Period Register |
TIMER1PRDH | 0x0C0B | 1 | CPU-Timer 1, Period Register High |
TIMER1TCR | 0x0C0C | 1 | CPU-Timer 1, Control Register |
Reserved | 0x0C0D | 1 | Reserved |
TIMER1TPR | 0x0C0E | 1 | CPU-Timer 1, Prescale Register |
TIMER1TPRH | 0x0C0F | 1 | CPU-Timer 1, Prescale Register High |
TIMER2TIM | 0x0C10 | 1 | CPU-Timer 2, Counter Register |
TIMER2TIMH | 0x0C11 | 1 | CPU-Timer 2, Counter Register High |
TIMER2PRD | 0x0C12 | 1 | CPU-Timer 2, Period Register |
TIMER2PRDH | 0x0C13 | 1 | CPU-Timer 2, Period Register High |
TIMER2TCR | 0x0C14 | 1 | CPU-Timer 2, Control Register |
Reserved | 0x0C15 | 1 | Reserved |
TIMER2TPR | 0x0C16 | 1 | CPU-Timer 2, Prescale Register |
TIMER2TPRH | 0x0C17 | 1 | CPU-Timer 2, Prescale Register High |
Reserved | 0x0C18 –
0x0C3F |
40 | Reserved |