r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 1289

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

Notes:
1. When programming is to be performed multiple times on a system, reduce the effective number of
2. If an erase error occurs during erasure, execute the clear status command and then the erase
*1. Determination of the number of times for programming /erasure operations.
*2. This is the number of times for which all electrical characteristics are guaranteed.
*3 Values for the data flush are in planning.
When the number of times for programming / erasure operations is n (n = 100), data can be erased
For example, if programming of 4 bytes is done 1024 times, each at a different address in a 4-
However, programming of any location in a block multiple times is not possible (overwriting is
programming operations by shifting the writing addresses in sequence and so on until the
remaining blank area is as small as possible and only then erasing the entire block once. For
example, if sets of 16 bytes are being programmed, erasing the block once after programming the
maximum number of sets (256) minimizes the effective number of programming operations.
We recommend keeping information on the number of times erasure is performed for each block,
and setting up the limit on the number of times.
command at least 3 times until the erase does not recur.
Number of times programming / erasure is performed in each block.
n times in each block.
kbyte per block, and the block is then erased, this counts as programming / erasure one time.
prohibited).
Rev. 1.00 Sep. 19, 2008 Page 1259 of 1342
Section 27 Electrical Characteristics
REJ09B0467-0100