TMS320DM643 datasheet(146/160 Pages) TI

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5.17.3

Timer Electrical Data/Timing

TINPx

TOUTx

TMS320DM643

Video/Imaging Fixed-Point Digital Signal Processor

SPRS269A – FEBRUARY 2005 – REVISED APRIL 2005

Table 5-73. Timer 2 Registers

HEX ADDRESS RANGE

ACRONYM

COMMENTS

Determines the operating mode of the timer, monitors the

01AC 0000

CTL2

Timer 2 control register

timer status.

Contains the number of timer input clock cycles to count.

01AC 0004

PRD2

Timer 2 period register

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

Table 5-74. Timing Requirements for Timer Inputs

(1) (see Figure 5-63)

–500

–600

NO.

UNIT

MIN

MAX

tw(TINPH)

Pulse duration, TINP high

tw(TINPL)

Pulse duration, TINP low

(1)

P = 1/CPU clock frequency in ns. For example, when running parts at 600 MHz, use P = 1.67 ns.

Table 5-75. Switching Characteristics Over Recommended Operating Conditions for Timer Outputs

(1)

(see Figure 5-63)

–500

–600

NO.

PARAMETER

UNIT

MIN

MAX

tw(TOUTH)

Pulse duration, TOUT high

8P – 3

tw(TOUTL)

Pulse duration, TOUT low

8P – 3

(1)

P = 1/CPU clock frequency in ns. For example, when running parts at 600 MHz, use P = 1.67 ns.

Figure 5-63. Timer Timing

146

DM643 Peripheral Information and Electrical Specifications

TMS320DM643 Datasheet(PDF) 146 Page - Texas Instruments

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