r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 789

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

The watchdog timer and reset module (WDT) comprises a reset control unit and a watchdog timer
control unit, and controls the power-on reset sequence and internal reset of the LSI.
The WDT is a single-channel timer that can be used either as a watchdog timer or interval timer.
16.1
• The watchdog timer unit monitors for system runaway using a timer counting at regular time
• Two operating modes:
• Selectable between power-on reset and manual reset. When manual reset is selected, a manual
• In order to prevent accidental writing to the WDT-related registers, writing to them is only
intervals.
⎯ In watchdog timer mode, internal reset of the chip is initiated on counter overflow and on-
⎯ In interval timer mode, an interrupt is generated on counter overflow.
reset signal is output from the MRESETOUT pin.
possible when a certain code is set in the uppermost eight bits in the data for writing.
chip modules are reset.
Features
Section 16 Watchdog Timer and Reset (WDT)
Rev.1.00 Jan. 10, 2008 Page 759 of 1658
16. Watchdog Timer and Reset (WDT)
REJ09B0261-0100