Chapter 8 Direct Memory Access Operation 55
1. When you configure your hardware, check if any PC DMA channel
is available (level 1 or level 3) and set PCM-3718H/3718HG
jumper JP1 accordingly.
2. If you will be using the PCM-3718H/3718HG driver for your DMA
transfer programming, see the Software Drivers User’s Manual for
more information.
3. If you choose to conduct your own DMA operation, you will need
to have a solid understanding of the PC, 8237 DMA controller and
the PCM-3718H/3718HG. Make sure you perform the following
steps in your DMA transfer:
a. Initialize the 8237 DMA controller register and page register.
b. Send DMA enable and trigger source data to the PCM-3718H/
3718HG control register (located at address BASE+9).
c. Set an external trigger pulse or pacer trigger rate.
d. Enable the trigger source to start the A/D conversion.
Summary of Contents for 3718HG
Page 1: ...PCM 3718H 3718HG PC 104 12 bit DAS Module with Programmable Gain User s manual ...
Page 2: ......
Page 5: ...1 General Information CHAPT ER ...
Page 13: ...2 Installation CHAPT ER ...
Page 21: ...3 Signal Connections CHAPT ER ...
Page 26: ...22 PCM 3718H 3718HG User s Manual ...
Page 27: ...4 Register Structure and Format CHAPT ER ...
Page 38: ...34 PCM 3718H 3718HG User s Manual ...
Page 39: ...5 A D Conversion CHAPT ER ...
Page 45: ...6 Digital Input Output CHAPT ER ...
Page 47: ...7 Programmable Pacer CHAPT ER ...
Page 57: ...8 Direct Memory Access Operation CHAPT ER ...
Page 60: ...56 PCM 3718H 3718HG User s Manual ...
Page 61: ...9 Calibration CHAPT ER ...
Page 64: ...60 PCM 3718H 3718HG User s Manual ...