PD70F3826_15 Datasheet, PDF (43/75 Pages) Renesas Technology Corp – RENESAS MCU

μ PD70F3826, 70F3827, 70F3828, 70F3829, 70F3830, 70F3831, 70F3832, 70F3833, 70F3834, 70F3835, 70F3836, 70F3837
12. WATCHDOG TIMER 2 FUNCTIONS
12. WDT2
In the V850ES/Jx3-E, one channel of watchdog timer 2 is provided.
The watchdog timer has the following functions.
• Reset mode:
Reset operation upon overflow of watchdog timer (generates the
WDT2RES signal)
• Non-maskable interrupt request mode: NMI operation upon overflow of watchdog timer (generates the
INTWDT2 signal)
The following figure shows the configuration of the watchdog timer functions.
fX/2⁷
fR/2³
Clock
input
controller
2
16-bit
counter
fX/2¹⁶ to fX/2²³,
fR/2¹² to fR/2¹⁹
Selector
Clear
3
Output
controller
3
INTWDT2
WDT2RES
(internal reset signal)
Watchdog timer enable
register (WDTE)
0 WDM21 WDM20 WDCS24 WDCS23 WDCS22 WDCS21 WDCS20
Watchdog timer mode
register 2 (WDTM2)
Internal bus
Remark
fX:
Main clock oscillation frequency
fR:
Internal oscillation clock frequency
INTWDT2: Non-maskable interrupt request signal from watchdog timer 2
WDT2RES: Watchdog timer 2 reset signal
R01DS0029EJ0001 Rev.0.01
Sep 30, 2010
Page 43 of 75