R28 datasheet(367/473 Pages) RENESAS

367 / 473 page

R8C/28 Group, R8C/29 Group

19. Flash Memory

Rev.2.10

Sep 26, 2008

Page 348 of 441

REJ09B0279-0210

19.4.2.10 FMR40 Bit

The suspend function is enabled by setting the FMR40 bit to 1 (enable).

19.4.2.11 FMR41 Bit

In EW0 mode, the MCU enters erase-suspend mode when the FMR41 bit is set to 1 by a program. The FMR41

bit is automatically set to 1 (request erase-suspend) when an interrupt request of an enabled interrupt is

generated in EW1 mode, and then the MCU enters erase-suspend mode.

Set the FMR41 bit to 0 (erase restarts) when the auto-erase operation restarts.

19.4.2.12 FMR42 Bit

In EW0 mode, the MCU enters program-suspend mode when the FMR42 bit is set to 1 by a program. The

FMR42 bit is automatically set to 1 (request program-suspend) when an interrupt request of an enabled

interrupt is generated in EW1 mode, and then the MCU enters program-suspend mode.

Set the FMR42 bit to 0 (program restart) when the auto-program operation restarts.

19.4.2.13 FMR43 Bit

When the auto-erase operation starts, the FMR43 bit is set to 1 (erase execution in progress). The FMR43 bit

remains set to 1 (erase execution in progress) during erase-suspend operation.

When the auto-erase operation ends, the FMR43 bit is set to 0 (erase not executed).

19.4.2.14 FMR44 Bit

When the auto-program operation starts, the FMR44 bit is set to 1 (program execution in progress). The FMR44

bit remains set to 1 (program execution in progress) during program-suspend operation.

When the auto-program operation ends, the FMR44 bit is set to 0 (program not executed).

19.4.2.15 FMR46 Bit

The FMR46 bit is set to 0 (reading disabled) during auto-program or auto-erase execution and set to 1 (reading

enabled) in suspend mode. Do not access the flash memory while this bit is set to 0.

19.4.2.16 FMR47 Bit

Power consumption when reading the flash memory can be reduced by setting the FMR47 bit to 1 (enabled) in

low-speed clock mode (XIN clock stops) and low-speed on-chip oscillator mode (XIN clock stops).

R28 Datasheet(PDF) 367 Page - Renesas Technology Corp