86FS27-20

2007-08-07

TMP86FS27

2.7

Flash Memory Writing Data Format

Flash memory area of TMP86FS27 consists of 1919 pages and one page size is 32 bytes.

Writing to flash memory is executed by page writing. Therefore, it is necessary to send 32 bytes

data (for one page) even though only a few bytes data are written. Figure 2.7.1 shows an

organization of flash memory area. When the controller sends the writing data to the device, be

sure to keep the format described below.

1. The address of data after receiving the flash memory writing command should be the first

address of page. For example, in case of page 2, the first address should be 1040H.

2. If the last data’s address of data record is not end address of page, the address of the next data

this page. For example, if the last data’s address is 100FH (Page0), the address of the next data

record should be 1010H (Page0) and the address of the last data should be 101FH (Page0).

3. The last data’s address of data record immediately before sending the end record should be the

last address of page. For example, in case of page 1, the last data’s address of data record should

be 103FH.

Note: Do not write only the vector area (FFF0H to FFFFH) when all data of flash memory are the

same data. If the vector area is only written, the next operation can not be executed because of

password error.

Note: “F” shows the first address of each page and “E” shows the last address of each page.

Figure 2.7.1 Organization of Flash Memory Area

E

E

E

E

E

E

E

E

E

E

E

F

F

F

F

F

F

F

F

F

F

F

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

1000H

1010H

1020H

1030H

1040H

1050H

1060H

1070H

1080H

1090H

10A0H

10B0H

10C0H

FF70H

FF80H

FF90H

FFA0H

FFB0H

FFC0H

FFD0H

FFE0H

FFF0H

Address

Page 0

Page 1

Page 2

Page 3

Page 4

Page 5

Page 1916

Page 1917

Page 1918

Page 1919