m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 192

• Manufacturer Part Number: m3819
• Description: Mitsubishi 8-bit Single-chip Microcomputer 740 Family / 38000 Series
• Manufacturer: Renesas Electronics Corporation.

3. APPENDIX
178
<The interrupt processing routine>
Decrements the SWDT contents by 1 at each interrupt processing.
Determins that the main routine operates normally when the SWDT contents are reset to the initial value N at almost
Detects that the main routine has failed and determines to branch to the program initialization routine for recovery
fixed cycles (at the fixed interrupt processing count).
processing in the following case:
If the SWDT contents are not initialized to the initial value N but continued to decrement and if they exceed the
limit (and reach 0 or less).
3819 Group USER’S MANUAL
3.2 Countermeasures against noise
MITSUBISHI MICROCOMPUTER
3819 Group