Renesas M32R/ECU Series User Manual page 472

11
Figure 11.2.1 shows an example of A-D disconnection detection assist method in which the conversion start
state is set to the AVCC side (i.e., precharge before conversion is selected). Figure 11.2.2 shows an example
of A-D disconnection detection assist method in which the conversion start state is set to the AVSS side (i.e.,
discharge before conversion is selected).
Typical external circuit (Note 1)
Broken wire
Note 1: In case of broken wire, the conversion result varies with external circuits.
Therefore, careful evaluation is required before this function can be used.
Figure 11.2.1 Example of A-D Disconnection Detection on AVCC Side (Precharge Before Conversion Selected)
Typical external circuit (Note 1)
Broken wire
Note 1: In case of broken wire, the conversion result varies with external circuits.
Therefore, careful evaluation is required before this function can be used.
Figure 11.2.2 Example of A-D Disconnection Detection on AVSS Side (Discharge Before Conversion Selected)
ADDDAEN
R
Analog input
ADiINn
C
ADDDAEN
Analog input
ADiINn
R C
11-27
11.2 A-D Converter Related Registers
On
Precharge
Off
Chopper amp
capacitor
Off
On
Discharge
Chopper amp
capacitor
32180 Group User's Manual (Rev.1.0)
A-D Converters
Precharge
control signal
Discharge
control signal
Precharge
control signal
Discharge
control signal