upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 739

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

19.1 Overview
The following reset functions are available.
(1)
(2)
Caution:
Five kinds of reset sources:
• External reset input via the RESET pin
• Reset via the watchdog timer 2 (WDT2) overflow (WDT2RES)
• System reset via the comparison of the low-voltage detector (LVI) supply voltage and detected
• System reset via the detecting clock monitor (CLM) oscillation stop (see Chapter 25 ”Clock
• System reset by power-on clear circuit (POC) (see Chapter 23 ”Power-On-Clear Circuit” on
Emergency operation mode:
If the WDT2 overflows during the main clock oscillation stabilization time inserted after reset, a
main clock oscillation anomaly is judged and the CPU starts operating on Ring-OSC.
voltage (see Chapter 24 ”Low-Voltage Detector” on page 781)
Monitor” on page 789)
page 779).
When the CPU is being operated via the Ring-OSC, access to the register in which a
wait state is generated is prohibited. For the register in which a wait state is gener-
ated, refer to 3.4.7
page 89.
User’s Manual U16702EE3V2UD00
Chapter 19 RESET Function
(3)”Accessing specific on-chip peripheral I/O registers” on
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