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8.10 Repeat sweep mode 1
In the repeat sweep mode 1, the operation for the input voltage from all selected analog input pins is
performed repeatedly.
In this mode, analog input pins are separated into two groups according to the frequency of use. One is the
group for more frequencies of use. The other is the group for few frequencies of use. First, the operations
to all analog input pins in the group of more frequencies of use are performed. Next, the operation to one
of analog input pins in the group of fewer frequencies of use is operated.
Figure 8.10.1 shows the analog input pin sweep operation. As shown in Figure 8.10.1, the pin to be
executed in the group of fewer frequencies changes sequently.
In this mode, no A-D conversion interrupt request occurs. Additionally, the A-D conversion start bit (bit 6 at
address 1E
) remains set to "1" until it is cleared to "0" by software, and the operation is performed
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repeatedly while the A-D conversion start bit is "1."
8.10.1 Settings for repeat sweep mode 1
Figure 8.10.2 shows an initial setting example of repeat sweep mode 1.
Select the analog input pins in the group of more frequencies of use by the A-D sweep pin select bits (bits
1 and 0 at address 1F
of fewer frequencies of use.
). Pins which are not selected by the A-D sweep pin select bits belong to the group
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7751 Group User's Manual
A-D CONVERTER
8.10 Repeat sweep mode 1
8–31
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