m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 345

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

A-D CONVERTER
Fig. 12.10.3 Operation in repeat sweep mode 0
12-34
12.10 Repeat sweep mode 0
12.10.2 Repeat sweep mode 0 operation
Figure 12.10.3 shows the operation in the repeat sweep mode 0.
bit is set to “1.”
bit resolution mode, or 59 cycles of
successive approximation register (conversion result) are transferred to the A-D register 0.
When the comparator function is selected, the comparison for pin AN
of
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
completed.
software.
The A-D converter starts its operation for the input voltage at pin AN
The A-D conversion for the input voltage at pin AN
The operations for all selected analog input pins are performed.
The operations for all selected analog input pins are performed again.
The A-D converter repeats its operation until the A-D conversion start bit is cleared to “0” by
AD
. Then, the result of the comparison is stored into the AN
Compare input voltage at pin AN
Compare input voltage at pin AN
Compare input voltage at pin AN
Convert input voltage at pin AN
Convert input voltage at pin AN
Convert input voltage at pin AN
Trigger generated
or
or
or
j
pin comparator result bit each time the comparison for one pin is
7905 Group User’s Manual Rev.1.0
1
j
AD
0
0
1
j
in the 10-bit resolution mode. Then, the contents of the
Comparison result
Comparison result
Comparison result
Conversion result
Conversion result
Conversion result
0
is completed after 49 cycles of
A-D register 0
A-D register 1
A-D register j
AN
AN
AN
j
1
0
pin comparator result bit
pin comparator result bit
pin comparator result bit
0
pin comparator result bit.
0
when the A-D conversion start
0
is completed after 14 cycles
AD
in the 8-