PM0054

Memory organization

Doc ID 15433 Rev 9

9/28

3.2

Low density STM8L05x/15x microcontrollers

The low density STM8L05x/15x memory features:

●

From 4 to 8 Kbytes of embedded Flash program divided into 128 pages of 64 bytes

each. The memory array is organized in 32-bit words (4 bytes). It includes two areas:

The Flash program memory is divided into 2 areas:

–

The user boot code area (UBC)

–

The main program area

The size of the UBC area can be configured through option bytes.

●

256 bytes of data EEPROM located in a distinct array from Flash program memory

●

Up to 64 option bytes (one block) of which 5 bytes are already used to configure device

hardware features. The option bytes can be programmed in user, IAP and ICP/SWIM

modes except for ROP and UBC option bytes (refer to Section 5.5.2).

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

STM8L05x/15x microcontrollers.

Table 3.

Area

Page number (1 page=1 block)

Address

Data EEPROM

0

0x00 1000-0x00 103F

1

0x00 1040-0x00 107F

2

0x00 1080-0x00 10BF

3

0x00 10C0- 0x00 10FF

Option bytes

0

0x00 4800-0x00 483F

Flash

program

memory

Main

program

memory

UBC, PCODE

0

0x00 8000-0x00 003F

1

0x00 8040-0x00 807F

2

0x00 8080-0x00 80BF

3

0x00 80C0-0x00 80FF

4

0x00 8100-0x00 813F

5

0x00 8140-0x00 817F

...

...

UBC

127

0x00 9FC0-0x00 9FFF

1.

The memory mapping is given for the devices featuring 8 Kbytes of Flash program memory and 1 Kbyte of data EEPROM.