r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 1307

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Notes:
1. In the system where multiple programming are executed, erase once so as to effectively diminish
2. If an erase error is occurred, execute the clear status command -> erase command for at least 3
*1. Determination of the number of times the programming /erase operation.
*2. Number of times that ensures all the electrical characteristics
*3 As for the data flush is under planning.
When the number of times the programming / erase is n times (n = 100), data can be erased n
For example, if 4 bytes programming is done 1024 times, each at a different address in a 4-kbyte
However, programming cannot be done multiple times in the block (overwriting is prohibited).
the programming times after having written with leaving the blank area as least as possible by
shifting writing address one by one.
For example, if 16 bytes per 1 set is being programmed, erase once after maximum 256 sets of
programming has been done, which diminish the effective programming times.
Keep the information of the times of erasure and set up the limitation times is recommended.
times until no erase error is occurred.
Number of times the programming / erase performed in each block.
times in each block.
per block, and then the block is erased, number of times the programming / erase can be one time.
Rev. 1.00 Sep. 19, 2008 Page 1277 of 1342
Section 27 Electrical Characteristics
REJ09B0467-0100