3069RF-ZTAT Datasheet, PDF (598/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

• Emulation function of flash memory by using the on-chip RAM
As flash memory is overlapped with part of the on-chip RAM, the flash memory programming
can be emulated in real time.
• Protection modes
There are two protection modes: software protection by the register setting and hardware
protection by the FWE pin. The protection state for flash memory programming/erasing can be
set.
When abnormalities, such as runaway of programming/erasing are detected, these modes enter
the error protection state and the programming/erasing processing is suspended.
• Programming/erasing time
The flash memory programming time is 3 ms (typ) in 128-byte simultaneous programming
and 25 µs per byte. The erasing time is 1000 ms (typ) per 64 kbyte block.
• Number of programming
The number of flash memory programming can be up to minimum 100 times.
Rev. 5.0, 09/04, page 576 of 978