TMS320LC2401AVFS datasheet(60/88 Pages) TI

60 / 88 page

TMS320LF2401A, TMS320LC2401A

DSP CONTROLLERS

SPRS161K − MARCH 2001 − REVISED JULY 2007

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

current consumption graphs

100

CLKOUT Frequency (MHz)

Figure 21. LF2401A Typical Current Consumption (With Peripheral Clocks Enabled)

reducing current consumption

240x DSPs incorporate a unique method to reduce the device current consumption. A reduction in current

consumption can be achieved by turning off the clock to any peripheral module which is not used in a given

application. Table 15 indicates the typical reduction in current consumption achieved by turning off the clocks

to various peripherals. Refer to the TMS320LF/LC240xA DSP Controllers Reference Guide: System and

Peripherals (literature number SPRU357) for further information on how to turn off the clock to the peripherals.

Table 15. Typical Current Consumption by Various Peripherals (at 40 MHz)

PERIPHERAL MODULE

CURRENT REDUCTION (mA)

EVA

6.1

ADC†

2.8†

SCI

1.9

† ADC current shown is at 30 MHz.

emulator connection without signal buffering for the DSP

Figure 22 shows the connection between the DSP and JTAG header for a single-processor configuration. If the

distance between the JTAG header and the DSP is greater than 6 inches, the emulation signals must be

buffered. If the distance is less than 6 inches, buffering is typically not needed. Figure 22 shows the simpler,

no-buffering situation. For the pullup/pulldown resistor values, see the pin description section. For details on

buffering JTAG signals and multiple processor connections, see TMS320F/C24x DSP Controllers CPU and

Instruction Set Reference Guide (literature number SPRU160).

TMS320LC2401AVFS Datasheet(PDF) 60 Page - Texas Instruments