r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 90

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
7.2.2
Notes:
7.2.3
Notes:
After Reset
After Reset
After Reset
1. When the VCAC1 bit is set tot 0 (one edge), the VW1C7 bit in the VW1C register is enabled. Set the VW1C7 bit
2. When the VCAC2 bit is set tot 0 (one edge), the VW2C7 bit in the VW2C register is enabled. Set the VW2C7 bit
1. To use the voltage monitor 0 reset, set the VCA25 bit to 1.
2. To use the voltage detection 1 interrupt or the VW1C3 bit in the VW1C register, set the VCA26 bit to 1.
3. To use the voltage detection 2 interrupt or the VW2C3 bit in the VW2C register, set the VCA27 bit to 1.
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 00034h
Symbol
Address 00031h
after setting the VCAC1 bit to 0.
after setting the VCAC2 bit to 0.
After the VCA26 bit is set from 0 to 1 and td(E-A) has elapsed, the voltage detection 1 circuit operates.
After the VCA27 bit is set from 0 to 1 and td(E-A) has elapsed, the voltage detection 2 circuit operates. Set the
PRC3 bit in the PRCR register to 1 (write enabled) before rewriting the VCA2 register.
Set the PRC3 bit in the PRCR register to 1 (write enabled) before rewriting the VCA2 register.
Symbol
Bit
Symbol
VCAC1 Voltage monitor 1 circuit edge select bit
VCAC2 Voltage monitor 2 circuit edge select bit
Symbol
VCA25
VCA26
VCA27
Bit
Voltage Monitor Circuit Edge Select Register (VCAC)
Voltage Detection Register 2 (VCA2)
—
—
—
—
—
—
—
—
—
—
—
The above applies when the LVDAS bit in the OFS register is 1.
The above applies when the LVDAS bit in the OFS register is 0.
VCA27
Preliminary document
Specifications in this document are tentative and subject to change.
b7
0
0
b7
—
0
Nothing is assigned. The write value must be 0. The read value is 0.
Nothing is assigned. The write value must be 0. The read value is 0.
Reserved
Voltage detection 0 enable bit
Voltage detection 1 enable bit
Voltage detection 2 enable bit
VCA26
b6
0
0
b6
—
0
Bit Name
VCA25
Bit Name
b5
0
1
b5
—
0
b4
—
0
0
(1)
(2)
(3)
b4
—
0
Set to 0.
0: Voltage detection 0 circuit disabled
1: Voltage detection 0 circuit enabled
0: Voltage detection 1 circuit disabled
1: Voltage detection 1 circuit enabled
0: Voltage detection 2 circuit disabled
1: Voltage detection 2 circuit enabled
b3
—
0
0
(1)
(2)
b3
—
0
0: One edge
1: Both edges
VCAC2
b2
—
0
0
b2
0
Function
VCAC1
b1
—
0
0
b1
0
Function
7. Voltage Detection Circuit
b0
—
0
0
b0
—
0
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R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
—