UPD78F1502AGK-GAK-AX Datasheet, PDF (841/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 24 LOW-VOLTAGE DETECTOR
Figure 24-11. Example of Software Processing After Reset Release (2/2)
• Checking reset source
Check reset source
TRAP of RESF
Yes
register = 1?
No
WDRF of RESF
register = 1?
Reset processing by
illegal instruction execution ^Note
Yes
No
LVIRF of RESF
register = 1?
Reset processing by
watchdog timer
No
Yes
Reset processing by
low-voltage detector
Power-on-clear/external
reset generated
Note
When instruction code FFH is executed.
Reset by the illegal instruction execution not issued by emulation with the in-circuit emulator or on-chip
debug emulator.
Remark
If bit 2 (LVISEL) of the low voltage detection register (LVIM) is set to “1”, the meanings of the above words
change as follows.
• Supply voltage (VDD) → Input voltage from external input pin (EXLVI)
• Detection voltage (VLVI) → Detection voltage (VEXLVI = 1.21 V)
R01UH0004EJ0501 Rev.5.01
825
Jun 20, 2011