TMS320DM643 datasheet(145/160 Pages) TI

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5.17

Timer

5.17.1

Timer Device-Specific Information

5.17.2

Timer Peripheral Register Description(s)

TMS320DM643

Video/Imaging Fixed-Point Digital Signal Processor

SPRS269A – FEBRUARY 2005 – REVISED APRIL 2005

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.

The DM643 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).

Table 5-71. Timer 0 Registers

HEX ADDRESS RANGE

ACRONYM

COMMENTS

Determines the operating mode of the timer, monitors the

0194 0000

CTL0

Timer 0 control register

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

Contains the number of timer input clock cycles to count.

0194 0004

PRD0

Timer 0 period register

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 5-72. Timer 1 Registers

HEX ADDRESS RANGE

ACRONYM

COMMENTS

Determines the operating mode of the timer, monitors the

0198 0000

CTL1

Timer 1 control register

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

Contains the number of timer input clock cycles to count.

0198 0004

PRD1

Timer 1 period register

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

DM643 Peripheral Information and Electrical Specifications

145

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