m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 342

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

Fig. 12.9.3 Operation in single sweep mode
12.9.2 Single sweep mode operation
Figure 12.9.3 shows the operation in the single sweep mode.
The A-D converter starts its operation for the input voltage at pin AN
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
In the 8-bit and 10-bit resolution modes, 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
the comparison for one pin is completed.
The A-D conversion for the input voltage at pin AN
The operations for all selected analog input pins are performed.
When step
The A-D conversion start bit is cleared to “0,” and the A-D converter halts.
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
is completed, the A-D conversion interrupt request bit is set to “1.”
A-D converter halts.
Trigger generated
or
or
or
7905 Group User’s Manual Rev.1.0
A-D converter interrupt request occurs.
1
j
0
0
1
j
AD
Comparison result
Comparison result
Comparison result
Conversion result
Conversion result
Conversion result
in the 10-bit resolution mode. Then, the contents of the
0
is completed after 49 cycles of
A-D register 0
A-D register 1
A-D register j
AN
AN
AN
1
j
0
pin comparator result bit
pin comparator result bit
pin comparator result bit
j
pin comparator result bit each time
0
A-D CONVERTER
pin comparator result bit.
12.9 Single sweep mode
0
when the A-D conversion start
0
is completed after 14 cycles
AD
in the 8-
12-31