r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 59

• Manufacturer Part Number: r5f21346mnfp
• Description: Single-chip Mcus Incorporates The R8c Cpu Core
• Manufacturer: Renesas Electronics Corporation.

R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
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 a 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
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5. Resets
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