PM0051

Memory organization

Doc ID 14614 Rev 3

9/27

2.3

High density STM8S microcontrollers

The memory is divided into two arrays:

●

From 32 to 128 Kbytes of Flash program memory organized in up to 256 pages of 4

blocks of 128 bytes each. The Flash program memory is divided into 2 areas, the user

boot code area (UBC), which size can be configured by option byte, and the main

program memory area. The Flash program memory is mapped in the upper part of the

STM8S addressing space and includes the reset and interrupt vectors.

●

From 1 to 2 Kbytes of data EEPROM (DATA) organized in up to 4 pages of 4 blocks of

128 bytes each. The size of the DATA area is fixed for a given microcontroller. One

block (128 bytes) contains the option bytes of which 15 are used to configure the

device hardware features. The options bytes can be programmed in user, IAP and

ICP/SWIM modes.

Refer to Table 3 for a detailed description of the memory partition for high density STM8S

microcontrollers.

Table 3.

Area

Page number (1 page=4 blocks)

Block number (1 block=128 bytes)

Address

Data EEPROM

0

0

0x00 4000-

0x00 407F

1

0x00 4080-

0x00 40FF

2

0x00 4100-

0x00 417F

3

0x00 4180-

0x00 41FF

1

4 to 7

0x00 4200-

0x00 43FF

2

8 to 11

0x00 4400-

0x00 45FF

3

12 to 15

0x00 4600-

0x00 47FF

Option bytes

-

0 (one block only)

0x00 4800-

0x00 487F