Memory organization

PM0051

10/27

Doc ID 14614 Rev 3

2.4

Medium density STM8A microcontrollers

The memory is divided into two arrays:

●

From 8 to 32 Kbytes of Flash program memory organized in up to 64 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 STM8A

addressing space and includes the reset and interrupt vectors.

●

From 384 bytes to 1 Kbytes of data EEPROM (DATA) organized in up to 2 pages of 4

blocks of 128 bytes each. One block (128 bytes) contains the option bytes of which 13

are used to configure the device hardware features. The options bytes can be

programmed in user, IAP and ICP/SWIM modes.

Refer to Table 4 for a detailed description of the memory partition for medium density

STM8A microcontrollers.

Flash program

memory

0

0

0x00 8000-

0x00 807F

1

0x00 8080-

0x00 80FF

2

0x00 8100-

0x00 817F

3

0x00 8180-

0x00 81FF

1

4 to 7

0x00 8200-

0x00 83FF

2

8 to 11

0x00 8400-

0x00 85FF

...

...

...

255

1020

0x00 27E00-

0x00 27E7F

1021

0x00 27E80-

0x00 27EFF

1022

0x00 27F00-

0x00 27F7F

1023

0x00 27F80-

0x00 27FFF

1.

The memory mapping is given for the devices featuring 128 Kbytes of Flash program memory and 2 Kbytes of data

EEPROM.

Table 3.

Area

Page number (1 page=4 blocks)

Block number (1 block=128 bytes)

Address