STM32W108B-SK STMicroelectronics, STM32W108B-SK Datasheet - Page 19

• Manufacturer Part Number: STM32W108B-SK
• Description: STARTER KIT FOR STM32W108
• Manufacturer: STMicroelectronics
• Series: STM32r
• Type: MCUr

Specifications of STM32W108B-SK

• Featured Product: STM32 Cortex-M3 Companion Products
• Contents: Board
• Silicon Manufacturer: ST Micro
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: STM32
• Silicon Family Name: STM32W108xx
• Kit Contents: Board
• Features: IEEE
• Mfg Application Notes: STM32W108 Adjacent Channel Rejection Measurements
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

AN3262
Figure 21. G
3.6
Note:
Note:
1
1
2
3
W
The W
RAM, Flash memory or Option byte area.
When the bootloader receives the W
the application. After sending the ACK byte, the bootloader waits for an address (4 bytes,
where Byte 1 is the address MSB and Byte 4 is the LSB) and a checksum byte, it then
checks the received address. For the Option byte area, the start address must be the base
address of the Option byte area (see note) to prevent unwanted writing to this area.
Write operations to Flash memory/SRAM must be word (32-bit) aligned and data should be
in multiples of four bytes. If less data are written, the remaining bytes should be filled by
0xFF.
If the received address is valid and the checksum is correct, the bootloader transmits an
ACK byte; otherwise, it transmits a NACK byte and aborts the command. When the address
is valid and the checksum is correct, the bootloader:
●
●
●
●
The maximum length of the block to be written for STM32W devices is 96 bytes.
If the W
before writing the new values.
When writing to the RAM, you should take care not to overlap the first RAM memory used by
the bootloader firmware.
No error is returned when performing write operations on write-protected sectors.
No error is returned when the start address is invalid.
O
RITE
command example
receives a byte (N) containing the number of data bytes to be received,
receives the user data ((N + 1) bytes) and the checksum (XOR of N and of all data
bytes),
programs the user data to memory starting from the received address,
at the end of the command, if the write operation was successful, the bootloader
transmits the ACK byte; otherwise it transmits a NACK byte to the application and
aborts the command.
RITE
RITE
M
M
EMORY
M
EMORY
EMORY
command writes data to any valid memory address (see note below) of
command is issued to the Option byte area, all options are erased
command
Doc ID 17845 Rev 2
RITE
M
EMORY
command, it transmits the ACK byte to
Bootloader command set
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