TMS320DM642 datasheet(162/178 Pages) TI

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5.18.3

Timer Electrical Data/Timing

TINPx

TOUTx

TMS320DM642

Video/Imaging Fixed-Point Digital Signal Processor

SPRS200J – JULY 2002 – REVISED AUGUST 2005

Table 5-83. 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 5-84. Timing Requirements for Timer Inputs

(1) (see Figure 5-69)

–500

–600

NO.

UNIT

–720

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 720 MHz, use P = 1.39 ns.

Table 5-85. Switching Characteristics Over Recommended Operating Conditions for Timer Outputs

(1)

(see Figure 5-69)

–500

–600

NO.

PARAMETER

UNIT

–720

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 720 MHz, use P = 1.39 ns.

Figure 5-69. Timer Timing

162

DM642 Peripheral Information and Electrical Specifications

TMS320DM642 Datasheet(PDF) 162 Page - Texas Instruments

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