R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 56

• 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 26 of 589
5.
The following resets are implemented: hardware reset, power-on reset, voltage monitor 0 reset, watchdog timer reset,
and software reset.
Table 5.1 lists the Reset Names and Sources. Figure 5.1 shows the Block Diagram of Reset Circuit.
Figure 5.1
Table 5.1
Hardware reset
Power-on reset
Voltage monitor 0 reset
Watchdog timer reset
Software reset
RESET
VCC
Resets
Reset Name
Reset Names and Sources
Block Diagram of Reset Circuit
Power-on reset
Watchdog
detection
Voltage
circuit
circuit
timer
CPU
Input voltage of RESET pin is held “L”
VCC rises
VCC falls (monitor voltage: Vdet0)
Underflow of watchdog timer
Write 1 to PM03 bit in PM0 register
Voltage monitor 0 reset
Watchdog timer
reset
Software reset
Power-on reset
Hardware reset
Note:
1. The CWR bit in the RSTFR register is set to 0 (cold start-up) after power-on or
voltage monitor 0 reset. This bit remains unchanged at a hardware reset,
software reset, or watchdog timer reset.
Source
Pin, CPU, and SFR
5. Resets
(1)