TMS320DM355 datasheet(144/153 Pages) TI

144 / 153 page

www.ti.com

5.15 Timer

5.15.1

Timer Electrical Data/Timing

TIM_IN

TMS320DM355

Digital Media System-on-Chip (DMSoC)

SPRS463 – SEPTEMBER 2007

The contains four software-programmable timers. Timer 0, Timer 1, and Timer 3 (general-purpose timers)

can be programmed in 64-bit mode, dual 32-bit unchained mode, or dual 32-bit chained mode. Timer 3

supports additional features over the other timers: external clock/event input, period reload, output event

tied to Real Time Out (RTO) module, external event capture, and timer counter register read reset. Timer

2 is used only as a watchdog timer. Timer 2 is tied to device reset.

• 64-bit count-up counter

• Timer modes:

–

64-bit general-purpose timer mode (Timer 0, 1, 3)

–

Dual 32-bit general-purpose timer mode (Timer 0, 1, 3)

–

Watchdog timer mode (Timer 2)

• Two possible clock sources:

–

Internal clock

–

External clock/event input via timer input pins (Timer 3)

• Three possible operation modes:

–

One-time operation (timer runs for one period then stops)

–

Continuous operation (timer automatically resets after each period)

–

Continuous operation with period reload (Timer 3)

• Generates interrupts to the ARM CPU

• Generates sync event to EDMA

• Generates output event to device reset (Timer 2)

• Generates output event to Real Timer Out (RTO) module (Timer 3)

• External event capture via timer input pins (Timer 3)

For more detailed information, see the TMS320DM355 DMSoC 64-bit Timer User's Guide for more

information (SPRUEE5).

Table 5-45. Timing Requirements for Timer Input(1)(2)(3) (see Figure 5-46)

DM355

NO.

UNIT

MIN

MAX

tc(TIN)

Cycle time, TIM_IN

tw(TINPH)

Pulse duration, TIM_IN high

0.45C

0.55C

tw(TINPL)

Pulse duration, TIM_IN low

0.45C

0.55C

tt(TIN)

Transition time, TIM_IN

0.05C

(1)

GPIO000, GPIO001, GPIO002, and GPIO003 can be used as external clock inputs for Timer 3. See the TMS320DM355 DMSoC 64-bit

Timer User's Guide for more information (SPRUEE5).

(2)

P = MXI1/CLKIN cycle time in ns. For example, when MXI1/CLKIN frequency is 24 MHz use P = 41.6 ns.

(3)

C = TIM_IN cycle time in ns. For example, when TIM_IN frequency is 24 MHz use C = 41.6 ns

Figure 5-46. Timer Input Timing

144

Peripheral Information and Electrical Specifications

Submit Documentation Feedback

TMS320DM355 Datasheet(PDF) 144 Page - Texas Instruments

TMS320DM355 Datasheet(HTML) 144 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL