M32C8A Datasheet, PDF (60/372 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M32C/80 Series

M32C/8A Group
6. Power Supply Voltage Detection Function
Voltage applied to VCC1
Vdet4 (V)
3 (V)
RESET ^{“H”}
“L”
(note 1)
Time
VC27 bit ¹
0
VC13 bit
1
0
<When wait mode/stop mode is not used>
Output from digital filter ^{“H”}
“L”
Sampling period
D42 bit ¹
0
Vdet4 detection
interrupt request signal ^{“H”}
from D42 bit ^{“L”}
Set to 0 by program
(note 2)
<When wait mode/stop mode is used>
Output from digital filter ^{“H”}
“L”
Sampling period
D42 bit ¹
0
Vdet4 detection
interrupt request signal ^{“H”}
from D42 bit ^{“L”}
D41 bit ¹
0
Vdet4 detection “H”
interrupt request signal “L”
when D41 bit is 1
Set to 0 by program
(note 3)
VC27 bit: bit in the VCR2 register
VC13 bit: bit in the VCR1 register
VC41 bit, VC42 bit: bits in the D4INT register
Wait mode or
stop mode
Wait mode or
stop mode
NOTES:
1. Apply an "L" to the RESET pin when the voltage input to the VCC1 pin drops to 3.0 V or below. When the
voltage rises above 3.0 V, and the voltage of the internal VDC and the main clock oscillation stabilize, apply an
"H" to the RESET pin.
2. When the D42 bit is set to 1, the Vdet4 detection interrupt request signal is not generated even if the Vdet4
detection signal is output from the digital filter.
3. If the Vdet4 detection interrupt has been used to exit wait mode or stop mode, set the D41 bit to 0 and then set
it back to 1 to use the Vdet4 detection interrupt again to exit wait/stop mode.
Figure 6.6 Vdet4 Detection Function Operation Example
Rev.1.00 Jul 15, 2007 Page 43 of 352
REJ09B0385-0100