R5F21133DFP RENESAS [Renesas Technology Corp], R5F21133DFP Datasheet - Page 38
R5F21133DFP
Manufacturer Part Number
R5F21133DFP
Description
16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY/R8C/Tiny SERIES
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.R5F21133DFP.pdf
(224 pages)
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Quantity
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Part Number:
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Manufacturer:
Renesas Electronics America
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R8C/13 Group
Rev.1.20
REJ09B0111-0120
Figure 5.13 Operation Detection Interrupt Generation Block
Figure 5.14 Voltage Detection Interrupt Generation Circuit Operation Example
Voltage detection circuit
Internal
reference
voltage
Watchdog timer block
V
D40, D41, D42, D43, DF0, DF1, D46, D47: Bits in D4INT register
VC13: Bit in VCR1 register
VC27: Bit in VCR2 register
CC1
Output of digital filter
Voltage detection
interrupt signal
VCC
VC13 bit
D42 bit
NOTES:
1. D40 is “1”(voltage detection interrupt enabled).
2. Output of the digital filter shown in Figure 5.11
Jan 27, 2006
VC27
+
-
(Canceller width: 200 ns)
Noise
canceller
Watchdog timer
underflow signal
Voltage detection signal
is “H” when VC27 bit= 0
(disabled)
(
2)
page 27 of 205
Voltage
detection
signal
f
VC13
RING-S
CM10
Voltage detection interrupt generation circuit
sampling
This bit is set to “0”(not detected) by writing a “0” in a program.
D43
1/2
CM02: Bit in CM0 register
CM10: Bit in CM1 register
D47
1/2
Noise rejection
circuit
DF1 to DF0
1/2
D41
D42: Bit in D4INT register
VC13: Bit in VCR1 register
sampling
=00
=01
=10
=11
2
2
2
2
Digital
filter
No voltage detection interrupt
signals are generated when D42 bit
is “H”.
Set D42 bit to “0”
in a program (not
detected)
D42 bit is set to “0”(not detected)
by writing a “0” in a program.
When VC27 bit is set to “0”
(voltage detection circuit
disabled), D42 bit is set to “0” .
D40
D42
D46
sampling
5.4 Voltage Detection Circuit
Set D42 bit to “0”
in a program (not
detected)
Voltage
detection
interrupt signal
Oscillation stop
detection
interrupt signal
Watchdog
timer interrupt
signal
sampling
Hardware reset 2
Non-maskable
interrupt signal
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