A-D CONVERTER
12.11 Repeat sweep mode 1
12.11.2 Repeat sweep mode 1 operation
✕ The A-D converter starts its operation for the input voltage at pin AN
bit is set to “1.”
0
when the A-D conversion start
✕ The A-D conversion for the input voltage at pin AN is completed after 49 cycles of φAD in the 8-
0
bit resolution mode, or 59 cycles of φAD in the 10-bit resolution mode. Then, the contents of the
successive approximation register (conversion result) are transferred to the A-D register 0.
When the comparator function is selected, the comparison for pin AN
0
is completed after 14 cycles
of φAD. Then, the result of the comparison is stored into the AN pin comparator result bit.
0
✕ The operations for all of the frequently-used analog input pins is performed. The conversion result
is transferred to the corresponding A-D register j each time when the A-D conversion per one pin
is completed. When the comparator function is selected, the comparison result is stored into the AN
pin comparator result bit each time the comparison for one pin is completed.
j
✕ The operation for one of the non-frequently-used analog input pins is performed. (See Figure
12.11.1.)
✕✕The operation for all of the frequently-used analog input pins is performed again.
✕✕The operation for one of the non-frequently-used analog input pins is performed. This pin differs
from the pin used in ✕. (See Figure 12.11.1.)
✕ The A-D converter repeats its operation until the A-D conversion start bit is cleared to “0” by
software.
7905 Group User’s Manual Rev.1.0
12-39
RENESAS [ RENESAS TECHNOLOGY CORP ]
