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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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PM0073 Datasheet(PDF) 14 Page - STMicroelectronics |
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PM0073 Datasheet(HTML) 14 Page - STMicroelectronics |
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14 / 34 page  Reading/programming the STM32Wxxx embedded Flash memory PM0073 14/34 Doc ID 17766 Rev 5 2.2.3 Main Flash memory programming The main Flash memory can be programmed 16 bits at a time. The program operation is started when the CPU writes a half-word into a main Flash memory address with the PG bit of the FLASH_CR register set. Any attempt to write data that is not half-word long will result in a bus error response from the FPEC. If a read/write operation is initiated during programming (BSY bit set), the CPU stalls until the ongoing main Flash memory programming is over. Figure 1. Programming procedure Read FLASH_CR_LOCK FLASH_CR_LOCK = 1 Yes No Yes No Perform unlock sequency Write FLASH_CR_PG to 1 Perform half-word write at the desired address FLASH_SR_BSY = 1 Check the programmed value by reading the programmed address Enable FPEC clock ai14307c |
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