PM0073 Datasheet, PDF (1/34 Pages) STMicroelectronics – STM32Wxxx Flash memory microcontrollers

PM0073
Programming manual
STM32Wxxx Flash memory microcontrollers
Introduction
This programming manual describes how to program the Flash memory of STM32W108
microcontrollers for the wireless line.
The STM32Wxxx embedded Flash memory can be programmed using in-circuit
programming or in-application programming.
The in-circuit programming (ICP) method is used to update the entire contents of the
Flash memory, using the JTAG, SWD protocol or the boot loader to load the user application
into the microcontroller. ICP offers quick and efficient design iterations and eliminates
unnecessary package handling or socketing of devices.
In contrast to the ICP method, in-application programming (IAP) can use any
communication interface supported by the microcontroller (I/Os, USB, CAN, UART, I²C, SPI,
etc.) to download programming data into memory. IAP allows the user to re-program the
Flash memory while the application is running. Nevertheless, part of the application has to
have been previously programmed in the Flash memory using ICP.
The Flash interface implements instruction access and data access based on the AHB
protocol. It implements a prefetch buffer that speeds up CPU code execution. It also
implements the logic necessary to carry out Flash memory operations (Program/Erase).
Program/Erase operations can be performed over the whole product voltage range.
Read/Write protections and option bytes are also implemented.
Table 1.
Applicable products
Type
Microcontroller
Part numbers
STM32W108CB, STM32W108HB, STM32W108C8,
STM32W108CC, STM32W108CZ
September 2012
Doc ID 17766 Rev 5
1/34
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