R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 75

• Manufacturer Part Number: R5F21324CNSP#U0
• Description: MCU 1KB FLASH 16K ROM 20-LSSOP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/32Cr

Specifications of R5F21324CNSP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 15
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-LSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/32C Group
REJ09B0573-0100 Rev.1.00 Dec. 18, 2009
Page 46 of 573
6.2.7
Notes:
After Reset
1. The VW1C0 is enabled when the VCA26 bit in the VCA2 register is set to 1 (voltage detection 1 circuit enabled).
2. When using the digital filter (while the VW1C1 bit is 0), set the CM14 bit in the CM1 register to 0 (low-speed on-
3. Bits VW1C2 and VW1C3 are enabled when the VCA26 bit in the VCA2 register is set to 1 (voltage detection 1
4. Set the VW1C2 bit to 0 by a program. When 0 is written by a program, this bit is set to 0 (and remains unchanged
5. The VW1C7 bit is enabled when the VCAC1 bit in the VCAC register is set to 0 (one edge). After setting the
6. When the VW1C0 bit is set to 1 (enabled), do not set the VW1C1 bit and bits VW1F1 and VW1F0 simultaneously
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 0039h
Symbol VW1C7
Set the VW1C0 bit to 0 (disabled) when the VCA26 bit is set to 0 (voltage detection 1 circuit disabled).
To set the VW0C0 bit to 1 (enabled), follow the procedure shown in Table 6.2 Procedure for Setting Bits
Associated with Voltage Monitor 1 Interrupt.
chip oscillator on).
To use the voltage monitor 1 interrupt to exit stop mode, set the VW1C1 bit in the VW1C register to 1 (digital filter
disabled).
circuit enabled).
even if 1 is written to it).
VCAC1 bit to 0, set the VW1C7 bit.
(with one instruction).
Set the PRC3 bit in the PRCR register to 1 (write enabled) before writing the VW1C register.
Rewriting the VW1C register may set the VW1C2 bit to 1. Set the VW1C2 bit to 0 after rewriting the VW1C
register.
Bit
VW1C0 Voltage monitor 1 reset interrupt enable
VW1C1 Voltage monitor 1 digital filter
VW1C2 Voltage change detection flag
VW1C3 Voltage detection 1 signal monitor flag
VW1C7 Voltage monitor 1 interrupt
Symbol
VW1F0 Sampling clock select bit
VW1F1
Voltage Monitor 1 Circuit Control Register (VW1C)
—
b7
1
bit
disable mode select bit
Reserved bit
generation condition select bit
(1)
b6
—
0
VW1F1
Bit Name
b5
0
(2, 6)
(6)
VW1F0
b4
0
(3, 4)
(5)
VW1C3
(3)
b3
1
0: Disabled
1: Enabled
0: Digital filter enabled mode
1: Digital filter disable mode
0: Not detected
1: Vdet1 passing detected
0: VCC
1: VCC
b5 b4
Set to 0.
0: When VCC reaches Vdet1 or above.
1: When VCC reaches Vdet1 or below.
0 0: fOCO-S divided by 1
0 1: fOCO-S divided by 2
1 0: fOCO-S divided by 4
1 1: fOCO-S divided by 8
(digital filter circuit enabled)
(digital filter circuit disabled)
or voltage detection 1 circuit disabled
VW1C2
b2
<
≥
0
Vdet1
Vdet1
VW1C1
b1
1
Function
VW1C0
6. Voltage Detection Circuit
b0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R