m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 339

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

A-D CONVERTER
12.8 Repeat mode
Fig. 12.8.3 Operation in repeat mode
12-28
12.8.2 Repeat mode operation
Figure 12.8.3 shows the operation in the repeat mode.
of
(conversion result) are transferred to the A-D register i.
When the comparator function is selected, the 1st comparison is completed after 14 cycles of
Then, the result of the comparison is stored into the AN
software. The conversion result is transferred to the A-D register i each time the conversion is
completed. When the comparator function is selected, the comparison result is stored into the AN
pin comparator result bit each time the comparison is completed.
The 1st A-D conversion is completed after 49 cycles of
The A-D converter starts its operation when the A-D conversion start bit is set to “1.”
The A-D converter repeats its operation until the A-D conversion start bit is cleared to “0” by
AD
in the 10-bit resolution mode. Then, the contents of the successive approximation register
8-bit and 10-bit resolution modes
Comparator function
Compare input voltage at pin AN
Convert input voltage at pin AN
Trigger generated
Trigger generated
7905 Group User’s Manual Rev.1.0
i
i
.
.
Conversion result
Comparison result
AD
i
in the 8-bit resolution mode, or 59 cycles
pin comparator result bit.
A-D register i
AN
result bit
i
pin comparator
AD
.
i