H8SLASH3028F datasheet(633/923 Pages) RENESAS

633 / 923 page

Rev. 2.00, 09/03, page 603 of 890

b. After write pulse application, a verify-read is performed in program-verify mode, and

programming is judged to have been completed for bits read as 0. The following processing

is necessary for programmed bits.

When programming is completed at an early stage in the program/program-verify

procedure:

If programming is completed in the 1st to 6th reprogramming processing loop, additional

programming should be performed on the relevant bits. Additional programming should

only be performed on bits which first return 0 in a verify-read in certain reprogramming

processing.

When programming is completed at a late stage in the program/program-verify procedure:

If programming is completed in the 7th or later reprogramming processing loop, additional

programming is not necessary for the relevant bits.

c. If programming of other bits is incomplete in the 128 bytes, reprogramming processing

should be executed. If a bit for which programming has been judged to be completed is

read as 1 in a subsequent verify-read, a write pulse should again be applied to that bit.

5. The period for which the P bit in FLMCR1 is set (the write pulse width) should be changed

according to the degree of progress through the program/program-verify procedure. For

detailed wait time specifications, see section 21.2.6, Flash Memory Characteristics.

Item

Symbol

Item

Symbol

Wait time after

tsp

When reprogramming loop count (n) is 1 to 6

tsp30

P bit setting

When reprogramming loop count (n) is 7 or more

tsp200

In case of additional programming processing*

tsp10

Note: * Additional programming processing is necessary only when the reprogramming loop count

(n) is 1 to 6.

6. The program/program-verify flowchart for the H8/3028F-ZTAT is shown in figure 18.10.

To cover the points noted above, bits on which reprogramming processing is to be executed,

and bits on which additional programming is to be executed, must be determined as shown

below.

Since reprogram data and additional-programming data vary according to the progress of the

programming procedure, it is recommended that the following data storage areas (128 bytes

each) be provided in RAM.

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