TMS320DM641 datasheet(163/171 Pages) TI

163 / 171 page

Timer

163

June 2003 − Revised August 2004

SPRS222C

4.17

Timer

The C6000

 DSP device has 32-bit general-purpose timers that can be used to:

•

Time events

•

Count events

•

Generate pulses

•

Interrupt the CPU

•

Send synchronization events to the DMA

The timers have two signaling modes and can be clocked by an internal or an external source. The timers have

an input pin and an output pin. The input and output pins (TINP and TOUT) can function as timer clock input

and clock output. They can also be respectively configured for general-purpose input and output.

With an internal clock, for example, the timer can signal an external A/D converter to start a conversion, or

it can trigger the DMA controller to begin a data transfer. With an external clock, the timer can count external

events and interrupt the CPU after a specified number of events.

4.17.1

Timer Device-Specific Information

The DM641/DM640 device has a total of three 32-bit general-purpose timers (Timer0, Timer1, and Timer2).

Timer2 is not externally pinned out.

For more detailed information, see the TMS320C6000 DSP 32-Bit Timer Reference Guide (literature number

SPRU582).

4.17.2

Timer Peripheral Register Description(s)

Table 4−74. Timer 0 Registers

HEX ADDRESS RANGE

ACRONYM

COMMENTS

0194 0000

CTL0

Timer 0 control register

Determines the operating mode of the timer, monitors the

timer status, and controls the function of the TOUT pin.

0194 0004

PRD0

Timer 0 period register

Contains the number of timer input clock cycles to count.

This number controls the TSTAT signal frequency.

0194 0008

CNT0

Timer 0 counter register

Contains the current value of the incrementing counter.

0194 000C − 0197 FFFF

−

Reserved

Table 4−75. Timer 1 Registers

HEX ADDRESS RANGE

ACRONYM

COMMENTS

0198 0000

CTL1

Timer 1 control register

Determines the operating mode of the timer, monitors the

timer status, and controls the function of the TOUT pin.

0198 0004

PRD1

Timer 1 period register

Contains the number of timer input clock cycles to count.

This number controls the TSTAT signal frequency.

0198 0008

CNT1

Timer 1 counter register

Contains the current value of the incrementing counter.

0198 000C − 019B FFFF

−

Reserved

Table 4−76. Timer 2 Registers

HEX ADDRESS RANGE

ACRONYM

COMMENTS

01AC 0000

CTL2

Timer 2 control register

Determines the operating mode of the timer, monitors the

timer status.

01AC 0004

PRD2

Timer 2 period register

Contains the number of timer input clock cycles to count.

This number controls the TSTAT signal frequency.

01AC 0008

CNT2

Timer 2 counter register

Contains the current value of the incrementing counter.

01AC 000C − 01AF FFFF

−

Reserved

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