R8CSLASH15 datasheet(258/277 Pages) RENESAS

258 / 277 page

R8C/14 Group, R8C/15 Group

20. Precautions

Rev.2.10

Jan 19, 2006

Page 246 of 253

REJ09B0164-0210

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

vector is allocated Block 0.

Table 20.2

Interrupt in EW1 Mode

Mod

Status

When maskable interrupt request

is acknowledged

When watchdog timer, oscillation stop

detection and voltage monitor 2 interrupt

request are acknowledged

EW1 During automatic

erasing (erase-

suspend function

is enabled)

The auto-erasing is suspended

after td(SR-ES) and the interrupt

process is executed. The auto-

erasing can be restarted by setting

the FMR41 bit in the FMR4

the interrupt process completes.

Once an interrupt request is acknowledged,

the auto-programming or auto-erasing is

forcibly stopped immediately 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-erasing 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 watchdog timer regularly using the

erase-suspend function.

During automatic

erasing (erase-

suspend function

is disabled)

The auto-erasing has a priority

and the interrupt request

acknowledgement is waited. The

interrupt process is executed after

the auto-erasing completes. Refer

to 20.8.1.9 Interrupt Request

Generation during Auto-erase

Operation in EW1 Mode

Auto

programming

The auto-programming has a

priority and the interrupt request

acknowledgement is waited. The

interrupt process is executed after

the auto-programming completes.

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