m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 365

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

WATCHDOG TIMER
[Precautions for watchdog timer]
[Precautions for watchdog timer]
1. When dummy data has been written to address 60
2. When the STP instruction is executed, the watchdog timer stops its operation. If the STP instruction’s
14-8
is simultaneously performed. Accordingly, when the user does not want to change the contents of the
watchdog timer frequency select bit (bit 0 at address 61
at STP termination (bits 6, 7 at address 61
in these bits, simultaneously with writing to address 60
code (31
its operation. Therefore, in the system where the watchdog timer is used to detect a program runaway,
we recommend that the STP instruction invalidity select bit (bit 0 at address 62
is invalid.) Refer to section “15.3 Stop mode.”
16
, 30
16
) has accidentally been executed owing to a program runaway, the watchdog timer stops
7905 Group User’s Manual Rev.1.0
16
), be sure to write again the values which are currently set
16
with the 16-bit data length, writing to address 61
16
16
.
) and watchdog timer clock source select bits
16
) = “1.” (STP instruction
16