r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 72

• Manufacturer Part Number: r5f21346mnfp
• Description: Single-chip Mcus Incorporates The R8c Cpu Core
• Manufacturer: Renesas Electronics Corporation.

R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
Figure 6.2
Figure 6.3
Voltage detection 1 circuit
VCC
VD1S3
to VD1S0
selection
Level
VW1C0 to VW1C3, VW1F0, VW1F1, VW1C6, VW1C7: Bits in VW1C register
VCA21, VCA22, VCA26: Bits in VCA2 register
VD1S0 to VD1S3: Bits in VD1LS register
COMPSEL, IRQ1SEL: Bits in CMPA register
VCAC1: Bit in VCAC register
Internal reference voltage
VCA22 = 0
VCA21 = 0
Block Diagram of Voltage Monitor 0 Reset Generation Circuit
Block Diagram of Voltage Monitor 1 Interrupt Generation Circuit
When VCA26 bit is set to 0 (disabled),
voltage detection 1 signal is driven high.
Voltage detection 0 circuit
VCC
VDSEL1
to VDSEL0
VCA26
+
-
VW0C0: Bit in VW0C register
VCA25: Bit in VCA2 register
VDSEL0, VDSEL1: Bits in OFS register
Level selection
Internal reference voltage
fOCO-S
Voltage
detection 1
signal
When VCA25 bit is set to 0 (disabled),
voltage detection 0 signal is driven high.
Voltage monitor 1 interrupt generation circuit
VW1C1 = 0
VW1C1 = 1
VW1C3
1/2
VCA25
+
-
1/2
VW1F1 to VW1F0
1/2
Voltage
detection 0
signal
= 00b
= 01b
= 10b
= 11b
Voltage monitor 0 reset generation circuit
Digital filter
VW1C2 bit is set to 0 (not detected) by writing 0 by a program.
When VCA26 bit is set to 0 (voltage detection 1 circuit disabled),
VW1C2 bit is set to 0.
VCAC1
VW1C7
VW0C0
selection
circuit
Edge
VW1C2
COMPSEL
IRQ1SEL
VW1C0
Voltage monitor 0
reset signal
6. Voltage Detection Circuit
Watchdog timer
interrupt signal
Voltage monitor 1
interrupt signal
Comparator A1
interrupt signal
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Non-maskable
interrupt signal
Maskable
interrupt signal