HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 377
HD6417034B
Manufacturer Part Number
HD6417034B
Description
32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417034B.pdf
(687 pages)
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12.4.4
If a WDTOVF signal is input to the RES pin, the chip cannot initialize correctly. Avoid logical
input of the WDTOVF output signal to the RES input pin. To reset the entire system with the
WDTOVF signal, use the circuit shown in figure 12.9.
12.4.5
If the RSTE bit is cleared to 0 in watchdog timer mode, the chip will not reset internally when a
TCNT overflow occurs, but TCNT and TCSR in the WDT will reset.
System Reset With WDTOVF
Internal Reset With Watchdog Timer
Figure 12.9 Example of System Reset Circuit Using WDTOVF
Reset signal to
entire system
Reset input
WDTOVF
WDTOVF
WDTOVF
SuperH microcomputer
Rev. 7.00 Jan 31, 2006 page 351 of 658
RES
WDTOVF
Section 12 Watchdog Timer (WDT)
WDTOVF
WDTOVF Signal
WDTOVF
REJ09B0272-0700
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