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Maxim > Design Support > Technical Documents > Application Notes > A/D and D/A Conversion/Sampling Circuits > APP 572
Keywords: DSP, TMS320, ADC, A/D, Serial Interface
APPLICATION NOTE 572
Interfacing the MAX195 ADC to the TMS320C3X
Evaluation Module
Jul 17, 2002
Abstract: Application note for interfacing the MAX195 and MAX194 analog-to-digital converters (ADCs) to
the TMS320C3X evaluation module. Example demo code is given. The demo software configures the
TMS320C30 so that FSR1 and DR1 are inputs and CLKR1 and XF1 are outputs. To read the
MAX194/MAX195, the software briefly drives the XF1 output low. The demo software polls the serial
receiver until a complete frame has been received. Because this is just an interface demo, the software
simply writes the received data word to the EVM host data port.
Overview
The MAX195 16-bit ADC can be interfaced to Texas Instruments' TMS320C30 DSP by means of its
serial interface. The interface uses four wires plus ground. This application note explains how to interface
the MAX194/MAX195 Evaluation Kit to the TMS320C3X Evaluation Module.
The example program was assembled using the TMS320C3X/4X COFF Assembler Version 4.50 and the
TMS320C3X/4F COFF Linker Version 4.50 (copyright 1987 through 1992 by Texas Instruments
Incorporated).
Interfacing the MAX194/MAX195 EVKIT to the TMS320C3X EVM
Maxim's MAX194/MAX195 Evaluation Kit can be interfaced to Texas Instruments' TMS320C3X
Evaluation Module as follows:
1. Set the MAX194/MAX195 EVKIT jumpers according to Table 1.
2. Solder a 2-x-5-pin berg strip into MAX194/MAX195 EVKIT area J3. The PC board is already wired
as shown in Table 2.
3. Connect a +5V power supply to the MAX194/MAX195 EVKIT.
4. Connect a 10-pin ribbon cable between the TMS320C3X EVM and the MAX194/MAX195 EVKIT.
5. Run the demo software.
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