UM0116

Flash module organization

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The Flash program memory is organized in 32-bit wide memory cells which can be used for

storing both code and data constants. The flash module is located at a specific base

address in the memory map of each STR7 Microcontroller type. For the base address,

please refer to the related STR7 Microcontroller Reference Manual.

SystemMemory is a sector used to boot the device in SystemMemory Boot Mode. The area

is reserved for use by STMicroelectronics. It is programmed by ST when the device is

manufactured and protected against spurious write/erase operations.

Bank 1 contains 16 Kbytes of Data Memory: it is divided into 2 sectors (8 Kbytes each). You

can program application data in this area.

You can Program Bank 0 and Bank 1 independently, i.e. you can read from one bank while

writing to the other.

The write operations of the two banks are managed by an embedded Flash Program/Erase

Controller (FPEC). The high voltage needed for Program/Erase operations is internally

generated.

The Flash memory can be protected against different types of unwanted access

(read/write/erase). There are two types of protection:

●

Sector Write Protection

●

Flash DEBUG/READOUT Protection

Refer to Section 3 for more details.

During a Flash write operation any attempt to read the bank under modification will output

invalid data. This means that the Flash bank is not fetchable when a write operation is

active.

Note:

The write operation commands must be executed from another bank or another memory

(internal RAM or external memory).

You can program Flash memory using In-Circuit Programming and In-Application

programming.