Datasheet

www.ti.com

ADS1256EVM-PDK Kit Operation

8.2.1 About the MMB0

The MMB0 is a Modular EVM System motherboard. It is designed around the TMS320VC5507, a DSP

from Texas Instruments that has an onboard USB interface. The MMB0 also has 16MB of SDRAM

installed.

The MMB0 is not sold as a DSP development board, and it is not available separately. TI cannot offer

support for the MMB0 except as part of an EVM kit. For schematics or other information about the MMB0,

contact Texas Instruments.

8.3 Connecting the Power Supply

The ADS1256EVM-PDK can be operated with a unipolar +5V supply or a bipolar ±5V supply.

If the ADS1256EVM-PDK is to be operated in unipolar mode only, either an ac adapter or a lab power

supply can be used. If the ADS1256EVM-PDK is to be operated in bipolar mode, a ±5V power supply

must be connected; an ac adapter cannot be used.

When the MMB0 DSP is powered properly, LED D2 glows green. The green light indicates that the 3.3V

supply for the MMB0 is operating properly. (It does not indicate that the EVM power supplies are

operating properly.)

8.3.1 Connecting an AC Adapter

An ac adapter can be connected to barrel jack J2 on the MMB0. J2 is located next to the USB connector.

The adapter must output 6V to 9V dc. The connector must be sleeve-negative, tip-positive. It should also

have a current rating of at least 500mA; refer to Figure 14.

When an ac adapter is used, the ADS1256EVM cannot be used in bipolar mode.

Jumper J12 on the MMB0 connects a wall-mounted power supply to the board. To use the wall-mount

supply, J12 must be shorted.

Figure 14. MMB0 Powered from AC Adapter

SBAU090C–November 2003–Revised July 2010 ADS1256EVM and ADS1256EVM-PDK