AN2556

Modified features

9/35

Moreover, the Flash Write/Erase controller is different and therefore the programming

routines must be updated.

When the XPEN bit of the SYSCON register and the XRAM2EN bit of XPERCON register

are set, access to the address range 09’0000h - 0D’FFFFh is not redirected to the external

memory. The linker-locator configuration of the toolchain should be checked in order to

prevent use of this memory range.

Note:

This range can be redirected to the external memory by changing the value of the register

XADRS3. Refer to Section 4.1: XADRS3 register for more details.

.

1.4

A/D converter

The Analog Digital converter has been redesigned in the ST10F273Z4. The ST10F273Z4

still provides an Analog/Digital converter with 10-bit resolution and a sample & hold circuit

on-chip.

Table 3.

Flash memories mapping

Segment

number

ST10F269Zx Flash mapping

ST10F273Z4 Flash mapping

14

0E’0000 - 0E’FFFF

External memory

0E’0000 - 0E’FFFF

Flash registers

13

05’0000 - 0D’FFFF

09’0000 - 0D’FFFF

Reserved

12

11

10

9

8

08’0000 - 08’FFFF

IBank 1, Block 1: 64 Kbytes

7

07’0000 - 07’FFFF

IBank 1, Block 0: 64 Kbytes

6

06’0000 - 06’FFFF

IBank 0, Block 9: 64 Kbytes

5

05’0000 - 05’FFFF

IBank 0, Block 8: 64 Kbytes

4

04’0000 - 04’FFFF

Block 6: 64 Kbytes

04’0000 - 04’FFFF

IBank 0, Block 7: 64 Kbytes

3

03’0000 - 03’FFFF

Block 5: 64 Kbytes

03’0000 - 03’FFFF

IBank 0, Block 6: 64 Kbytes

2

02’0000 - 02’FFFF

Block 4: 64 Kbytes

02’0000 - 02’FFFF

IBank 0, Block 5: 64 Kbytes

1

01’8000 - 01’FFFF

Block 3: 32 Kbytes

01’8000 - 01’FFFF

IBank 0, Block 4: 32 Kbytes

01’0000 - 01’7FFF

External memory

01’0000 - 01’7FFF

External memory

0

00’8000 - 00’FFFF

External memory

Internal RAM

00’8000 -00’FFFF

External memory

Internal RAM

00’6000 - 00’7FFF

Block 2: 8 Kbytes

00’6000 - 00’7FFF

IBank 0, Block 3: 8 Kbytes

00’4000 - 00’5FFF

Block 1: 8 Kbytes

00’4000 - 00’5FFF

IBank 0, Block 2: 8 Kbytes

00’0000 - 00’3FFF

Block 0: 16 Kbytes

00’2000 - 00’3FFF

IBank 0, Block 1: 8 Kbytes

00’0000 - 00’1FFF

IBank 0, Block 0: 8 Kbytes