R8C/13 Group
19. Usage Notes
ꢀꢀInterrupt
Table 19.1 list the Interrupt in EW0 Mode and Table 19.2 lists the Interrupt in EW1 Mode.
Table 19.1 Interrupt in EW0 Mode
When maskable
interrupt request is
acknowledged
Mode
EW0
Status
When watchdog timer, oscillation stop detection, and
voltage detection interrupt request are acknowledged
Any interrupt can be Once an interrupt request is acknowledged, the auto-
used by allocating a programming or auto-erasing is forcibly stoped and
During auto-
matic erasing
vector to RAM
resets the flash memory. An interrupt process starts
after the fixed period and the flash memory restarts.
Since the block during the auto-erasing or the address
during the auto-programming is forcibly stopped, the
normal value may not be read. Execute the auto-eras-
ing again and ensure the auto-erasing is completed
normally.
Automatic
writing
Since the watchdog timer does not stop during the
command operation, the interrupt request may be
generated. Reset the watchdogi timer regularly.
NOTES:
1. Do not use the address match interrupt while the command is executed because the vector of the
address match interrupt is allocated on ROM.
2. Do not use the non-maskable interrupt while Block 0 is automatically erased because the fixed bector is
allocated Block 0.
Rev.1.20 Jan 27, 2006 page 196 of 205
REJ09B0111-0120
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