4. Using the I/O Address Map
ADI16-4(FIT)GY
27
Setting sampling conditions
This step sets sampling conditions.
In terms of procedures, a sampling condition setup command is issued, and then settings data is output.
Starting
I/O
address
D7
D6
D5
D4
D3
D2
D1
D0
Output
Command
+24
(18h)
0
0
0
0
0
0
1
0
D7
D6
D5
D4
D3
D2
D1
D0
Output
FIFO Flag
+28
(1Ch)
0
0
0
0
0
Channel
Mode
Sampling
Clock
Sampling
Mode
Figure 4.17. Setting sampling conditions
-
Channel mode [D2]:
Set the mode in which the sampling is to be performed.
Select either the "single-channel mode", in which only one channel is specified, or the "multi-
channel mode", in which two or more channels are specified.
Channel Mode
[0]: Single *Initialized state
[1]: Multi
-
Sampling clock [D1]:
This option should be set when the clock mode is selected in the specification of a sampling mode.
Sampling Clock
[0]: Internal Clock
* Initialized state
[1]: Reserved
-
Sampling mode [D0]:
This step sets the conversion operation.
Specify either the "software mode", in which a specified channel is sampled once, or the "clock
mode", in which sampling is performed periodically according to clock signals.
Sampling Mode
[0]: Software Command * Initialized state
[1]: Clock
Following are examples in which sampling conditions are specified :
outp( ADR+24, 0x2 );
outp( ADR+28, ConditionData );
