R5F21324ANSP#U1 Renesas Electronics America, R5F21324ANSP#U1 Datasheet - Page 81

• Manufacturer Part Number: R5F21324ANSP#U1
• Description: MCU 1KB FLASH 16K ROM 20-LSSOP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/32Ar

Specifications of R5F21324ANSP#U1

• 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: -

Under development
R8C/32A Group
REJ09B0458-0020 Rev.0.20
Page 51 of 583
6.5
Table 6.3
Notes:
Table 6.3 lists the Procedure for Setting Bits Associated with Voltage Monitor 1 Interrupt. Figure 6.6 shows an
Operating Example of Voltage Monitor 1 Interrupt.
To use the voltage monitor 1 interrupt to exit stop mode, set the VW1C1 bit in the VW1C register to 1 (digital filter
disabled).
14
Step
3
4
7
9
1. When the VW1C0 bit is set to 0, steps 2, 3 and 4 can be executed simultaneously (with one instruction).
2. When the VW1C0 bit is set to 0, steps 6 and 7 can be executed simultaneously (with one instruction).
3. When the VW1C0 bit is set to 0, steps 8 and 9 can be executed simultaneously (with one instruction).
4. If VCC ≤ Vdet1 (or VCC ≥ Vdet1) is detected and the VW1C2 bit is set to 1 before enabling the
10
12
13
11
1
2
5
6
8
(1)
(1)
(3)
(2)
(4)
voltage monitor 1 interrupt, no interrupt request is generated.
Read the VW1C2 bit and perform the processing to be executed when VCC ≤ Vdet1 (or VCC ≥
Vdet1) is detected.
Voltage Monitor 1 Interrupt
Select the voltage detection 1 detection voltage by bits VD1S3 to VD1S0 in the VD1LS register.
Set the VCA21 bit in the VCA2 register to 0 (internal reference voltage).
Set the VCA22 bit in the VCA2 register to 0 (VCC voltage).
Set the VCA26 bit in the VCA2 register to 1 (voltage detection 1 circuit enabled).
Wait for td(E-A).
Set the COMPSEL bit in the CMPA register to 1.
Select the interrupt type by the IRQ1SEL in the CMPA register.
Select the sampling clock of the digital filter by
bits VW1F0 and VW1F1 in the VW1C register.
Set the VW1C1 bit in the VW1C register to 0
(digital filter enabled).
Select the interrupt request timing by the VCAC1 bit in the VCAC register and
the VW1C7 bit in the VW1C register.
Set the VW1C2 bit in the VW1C register to 0.
Set the CM14 bit in the CM1 register to 0
(low-speed on-chip oscillator on)
Wait for 2 cycles of the sampling clock of
the digital filter
Set the VW1C0 bit in the VW1C register to 1 (voltage monitor 1 interrupt enabled)
Procedure for Setting Bits Associated with Voltage Monitor 1 Interrupt
Preliminary specification
Specifications in this manual are tentative and subject to change.
When Using Digital Filter
Nov 05, 2008
Set the VW1C1 bit in the VW1C register to 1
(digital filter disabled).
−
−
− (No wait time required)
When Using No Digital Filter
6. Voltage Detection Circuit