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Using the DAC8881EVM with DXP
This section covers the specific operation of the DAC8881EVM-PDK. Throughout this document, the
abbreviation EVM and the term evaluation module are synonymous with the DAC8881EVM.
4.1
Hardware
The hardware consists of two main components, the first is the DAC8881EVM itself and the other is a
modular motherboard called the MMB0. The MMB0 board houses a TMS320VC5507 DSP which controls
the DAC8881 serial interface.
The hardware needs to be configured such that the DAC8881EVM is plugged onto the MMB0 aligning
female connectors P4, P2 and P6 (bottom side of the DAC8881EVM) with male connectors J4, J7 and J5
on the MMB0. Please exercise caution when assembling the boards as it is possible to misalign the
connectors. DO NOT connect the MMB0 to your PC before installing the DXP software as described in the
DXP User’s Guide! Installing the software will ensure the necessary drivers are properly loaded to run the
hardware.
Figure 11. MMB0 with DAC8881EVM Installed
4.2
MMB0 Power Supplies
Several power connections are required for the hardware to work properly. For the MMB0, the supplied 6V
AC/DC converter is all that is necessary. Please ensure J12 on the MMB0 board is closed before
connecting the AC/DC adapter to the DC In connector of the MMB0. This supply will provide all power to
the digital portion of the DAC8881EVM as well as all necessary power for the DSP. Analog power for the
DAC8881EVM must be supplied externally via J14 – a 6 position screw terminal mounted in the lower left
corner of the MMB0 board.
17
SLAU257A – September 2008 – Revised November 2009
DAC8881 Evaluation Module
Copyright © 2008–2009, Texas Instruments Incorporated