R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 68

• 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 39 of 573
Figure 6.2
Figure 6.3
Voltage detection 1 circuit
VCC
VD1S3
to VD1S0
selection
Level
VW1C0 to VW1C3, VW1F0, VW1F1, VW1C7: Bits in VW1C register
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
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
VDSEL1
to VDSEL0
VCC
VCA26
+
-
VW0C0: Bit in VW0C register
VCA25: Bit in VCA2 register
VDSEL0, VDSEL1: Bits in OFS register
Level selection
Internal reference voltage
When VCA25 bit is set to 0 (disabled),
voltage detection 0 signal is driven high.
fOCO-S
Voltage
detection 1
signal
Voltage monitor 1 interrupt generation circuit
VCA25
+
-
VW1C1 = 0
VW1C1 = 1
VW1C3
1/2
1/2
VW1F1 to VW1F0
Voltage
detection 0
signal
1/2
= 00b
= 01b
= 11b
= 10b
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
Non-maskable
interrupt signal
Maskable
interrupt signal