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PCM-3718H/3718HG User's Manual
The key to programming the PCM-3718H/3718HG is to understand
the function of the card’s 16 registers. The PCM-3718H/3718HG
requires 16 consecutive addresses in the PC’s I/O space. Each address
corresponds to a card register. The address of each register is specified
as an offset from the card’s base address. For example, BASE+0 is the
card’s base address and BASE+7 is the base address plus seven bytes.
If the card’s base address is 300h, the register’s address is 307h. The
following sections give detailed information on the layout and
function of each of the card’s registers.
I/O port address map
The following table shows the function of each register or driver and
its address relative to the base address of the module.
I/O port address assignments
Address
Read
Write
BASE+0 A/D low byte & channel
Software A/D trigger
BASE+1 A/D high byte
A/D range control
BASE+2 MUX scan
MUX scan channel & range
control pointer
BASE+3 DIO low byte (DIO 0-7)
DIO low byte (DIO 0-7)
BASE+4 N/A
N/A
BASE+5 N/A
N/A
BASE+6 N/A
N/A
BASE+7 N/A
N/A
BASE+8 Status
Clear interrupt request
BASE+9 Control
Control
BASE+10 N/A
Counter enable
BASE+11 DIO high byte (DIO 8-15) DIO high byte (DIO 8-15)
BASE+12 Counter 0
Counter 0
BASE+13 Counter 1
Counter 1
BASE+14 Counter 2
Counter 2
BASE+15 N/A
Counter control
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 ...