upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 213

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

9.1 Functions
The watchdog timer has the following functions. Figure 9-1 shows a block diagram of the watchdog timer.
• Watchdog timer
• Interval timer
• Selecting the oscillation stabilization time
Caution Use the watchdog timer mode register (WDTM) to select the watchdog timer mode or the interval
Notes 1.
Remark
f
XX
/ 2
10
2.
timer mode.
f
In watchdog timer mode
In interval timer mode
XX
: Main clock frequency
Prescaler
RUN
Clear
WDCS
Figure 9-1. Block Diagram of Watchdog Timer
WDCS2 WDCS1 WDCS0
f
f
f
f
f
f
f
f
XX
XX
XX
XX
XX
XX
XX
XX
CHAPTER 9 WATCHDOG TIMER
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User’s Manual U12768EJ4V1UD
OSTS
controller
Output
OSTS2 OSTS1 OSTS0
Internal bus
3
WDTM
OSC
INTWDT
INTWDTM
RUN
Note 1
WDTM4
Note 2
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