R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 70

• Manufacturer Part Number: R5F21334CNFP#U0
• Description: MCU 1KB FLASH 16K ROM 32-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/33Cr

Specifications of R5F21334CNFP#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: 27
• 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 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/33C Group
REJ09B0570-0100 Rev.1.00 Dec. 14, 2009
Page 40 of 589
Figure 6.4
Voltage detection 2 circuit
Watchdog timer block
VCC
VW2C0 to VW2C3, VW2F0, VW2F1, VW2C7: Bits in VW2C
VCA13: Bit in VCA1 register
VCA27: Bits in VCA2 register
COMPSEL, IRQ2SEL: Bits in CMPA register
VCAC2: Bit in VCAC register
Internal reference voltage
change
Level
When VCA27 bit is set to 0 (disabled),
voltage detection 2 signal is driven high.
Block Diagram of Voltage Monitor 2 Interrupt Generation Circuit
VCA27
Watchdog timer underflow signal
+
-
Voltage
detection 2
signal
fOCO-S
VCA13
Voltage monitor 2 interrupt generation circuit
VW2C3
VW2C1 = 0
VW2C1 = 1
VW2C3 bit is set to 0 (not detected)
by writing 0 by a program.
1/2
1/2
VW2F1 to VW2F0
1/2
= 00b
= 01b
= 11b
= 10b
Digital filter
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.
VCAC2
VW2C7
selection
Edge
circuit
VW2C2
COMPSEL
VW2C0
IRQ2SEL
6. Voltage Detection Circuit
Watchdog timer
interrupt signal
Voltage monitor 2
interrupt signal
Maskable
interrupt signal
Non-maskable
interrupt signal