r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 74

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
6.
The following resets are provided: hardware reset, power-on reset, voltage monitor 0 reset triggered by the voltage
detection circuit, watchdog timer reset, and software reset.
6.1
Figure 6.1
Table 6.1
Hardware reset
Power-on reset
Voltage monitor 0 reset
Watchdog timer reset
Software reset
Table 6.1 lists the Reset Names and Sources and Figure 6.1 shows the Reset Circuit Block Diagram.
Resets
RESET
VCC
Overview
Note:
Reset Name
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 after a hardware reset, software reset, or watchdog timer reset.
Preliminary document
Specifications in this document are tentative and subject to change.
Reset Names and Sources
Reset Circuit Block Diagram
detection circuit
Watchdog timer
reset circuit
Power-on
Voltage
CPU
When a low level is applied to the RESET pin.
When VCC is turned on.
When VCC falls below Vdet0, which is detected by voltage detection circuit 0.
When the watchdog timer underflows.
When 1 is written to the PM03 bit in the PM0 register by a program.
Hardware reset
Power-on reset
Voltage monitor 0
reset
Watchdog timer
reset
Software reset
Source
CPU, SFRs, and I/O ports
Page 43 of 725
6. Resets
(1)