R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 67

• 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 37 of 589
6.
The voltage detection circuit monitors the voltage input to the VCC pin. This circuit can be used to monitor the VCC
input voltage by a program.
6.1
Table 6.1
VCC
monitor
Process at
voltage
detection
Digital filter
The detection voltage of voltage detection 0 can be selected among four levels using the OFS register.
The detection voltage of voltage detection 1 can be selected among 16 levels using the VD1LS register.
The voltage monitor 0 reset, and voltage monitor 1 interrupt and voltage monitor 2 interrupt can also be used.
Voltage Detection Circuit
Overview
Item
Voltage to
monitor
Detection
target
Detection
voltage
Monitor
Reset
Interrupts
Switching
enable/disable
Sampling
time
Voltage Detection Circuit Specifications
Vdet0
Whether passing through
Vdet0 by falling
Selectable among
4 levels using the OFS
register.
None
Voltage monitor 0 reset
Reset at Vdet0 > VCC;
CPU operation restarts
at VCC > Vdet0
None
No digital filter function
—
Voltage Monitor 0
Vdet1
Whether passing through
Vdet1 by rising or falling
Selectable among
16 levels using the VD1LS
register.
The VW1C3 bit in
the VW1C register
Whether VCC is higher or
lower than Vdet1
None
Voltage monitor 1 interrupt
Non-maskable or maskable
selectable
Interrupt request at:
Vdet1 > VCC
and/or
VCC > Vdet1
Supported
(fOCO-S divided by n) × 2
n: 1, 2, 4, and 8
Voltage Monitor 1
Vdet2
Whether passing through
Vdet2 by rising or falling
The fixed level.
The VCA13 bit in
the VCA1 register
Whether VCC or LVCMP2
input voltage is higher or
lower than Vdet2
None
Voltage monitor 2 interrupt
selectable
Interrupt request at:
Vdet2 > VCC
and/or
VCC > Vdet2
Supported
(fOCO-S divided by n) × 2
n: 1, 2, 4, and 8
Non-maskable or maskable
6. Voltage Detection Circuit
Voltage Monitor 2