PCM-3718 Series User Manual
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DMAE
Disable/Enable PCM-3718H/HG/HO DMA transfers.
0 Disables
DMA
transfer.
1
Enables DMA transfer. Each A/D conversion
initiates two successive DMA request signals. These
signals cause the 8237 DMA controller to transfer
two bytes of conversion data from the PCM-3718
card to memory.
ST1 to ST0
Trigger source
4.10 Pacer Enable Register - BASE+10
Register BASE+10 enables or disables the PCM-3718’s pacer.
TC0
Disable/enable pacer
0
Pacer enabled
1
Pacer disabled
4.11 Programmable Pacer Reg. - BASE+12/13/14/15
These four registers located at addresses BASE+12, BASE+13,
BASE+14 and BASE+15 are used for the Intel 8254 programmable
pacer. Please refer to Chapter 7 Programmable Pacer or 8254 product
literature for detailed application information.
Note
You must program the PC’s 8237 DMA controller as
the DMA page register before you set DMAE to1.
Trigger Source
ST1
ST0
Software trigger
0
X
External trigger
1
0
Pacer trigger
1
1
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