R8CSLASH13 datasheet(207/224 Pages) RENESAS

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R8C/13 Group

19. Usage Notes

Rev.1.20

Jan 27, 2006

page 196 of 205

REJ09B0111-0120

q Interrupt

Table 19.1 list the Interrupt in EW0 Mode and Table 19.2 lists the Interrupt in EW1 Mode.

Mode

EW0

Status

During auto-

matic erasing

When maskable

interrupt request is

acknowledged

Any interrupt can be

used by allocating a

vector to RAM

When watchdog timer, oscillation stop detection, and

voltage detection interrupt request are acknowledged

Once an interrupt request is acknowledged, the auto-

programming or auto-erasing is forcibly stoped and

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.

Since the watchdog timer does not stop during the

command operation, the interrupt request may be

generated. Reset the watchdogi timer regularly.

Automatic

writing

Table 19.1 Interrupt in EW0 Mode

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.

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