R5F212L2SNXXXFP View Datasheet(PDF) - Renesas Electronics
Part Name
Description
Manufacturer
R5F212L2SNXXXFP Datasheet PDF : 471 Pages
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R8C/2K Group, R8C/2L Group
6. Voltage Detection Circuit
Voltage monitor 1 interrupt/reset generation circuit
Voltage detection 1 circuit
VCA26
fOCO-S
VCC +
Internal -
reference
voltage
Noise filter
(Filter width: 200 ns)
Voltage
detection
1 signal
Voltage detection 1 signal
is held “H” when VCA26 bit
is set to 0 (disabled)
VW1F1 to VW1F0
= 00b
= 01b
= 10b
1/2 1/2 1/2 = 11b
VW1C3
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
VW1C1
Digital
filter
VW1C2
VW1C1
VW1C0 to VW1C3, VW1F0, VW1F1, VW1C6, VW1C7: Bits in VW1C register
VCA26: Bit in VCA2 register
VW1C7
VW1C0
VW1C6
Watchdog
timer interrupt
signal
Voltage monitor 1
interrupt signal
Oscillation stop
detection
interrupt signal
Non-maskable
interrupt signal
Voltage monitor 1
reset signal
Figure 6.3 Block Diagram of Voltage Monitor 1 Interrupt/Reset Generation Circuit
Voltage monitor 2 interrupt/reset generation circuit
Voltage detection 2 circuit
VCA27
fOCO-S
VCC +
Internal -
reference
voltage
VCA13
Noise filter
(Filter width: 200 ns)
Voltage
detection
2 signal
Voltage detection 2 signal
is held “H” when VCA27 bit
is set to 0 (disabled)
VW2F1 to VW2F0
= 00b
= 01b
= 10b
1/2 1/2 1/2 = 11b
VW2C2 bit is set to 0 (not detected) by
writing 0 by a program.
When VCA27 bit is set to 0 (voltage
detection 2 circuit disabled), VW2C2
bit is set to 0
VW2C1
Digital
filter
VW2C2
VW2C1
Watchdog timer block
Watchdog timer
underflow signal
VW2C3
VW2C7
This bit is set to 0 (not detected) by writing 0
by a program.
VW2C0 to VW2C3, VW2F0, VW2F1, VW2C6, VW2C7: Bits in VW2C register
VCA13: Bit in VCA1 register
VCA27: Bit in VCA2 register
VW2C0
VW2C6
Watchdog
timer interrupt
signal
Voltage monitor 2
interrupt signal
Oscillation stop
detection
interrupt signal
Non-maskable
interrupt signal
Voltage monitor 2
reset signal
Figure 6.4 Block Diagram of Voltage Monitor 2 Interrupt/Reset Generation Circuit
Rev.1.10 Dec 21, 2007 Page 34 of 450
REJ09B0406-0110
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