Datasheet

Memory mapping STM32L431xx
76/200 DocID028800 Rev 1
APB2
0x4001 3000 - 0x4001 33FF 1 KB SPI1
0x4001 2C00 - 0x4001 2FFF 1 KB TIM1
0x4001 2800 - 0x4001 2BFF 1 KB SDMMC1
0x4001 2000 - 0x4001 27FF 2 KB Reserved
0x4001 1C00 - 0x4001 1FFF 1 KB FIREWALL
0x4001 0800- 0x4001 1BFF 5 KB Reserved
0x4001 0400 - 0x4001 07FF 1 KB EXTI
0x4001 0200 - 0x4001 03FF
1 KB
COMP
0x4001 0030 - 0x4001 01FF VREFBUF
0x4001 0000 - 0x4001 002F SYSCFG
APB1
0x4000 9800 - 0x4000 FFFF 26 KB Reserved
0x4000 9400 - 0x4000 97FF 1 KB LPTIM2
0x4000 8C00 - 0x4000 93FF 2 KB Reserved
0x4000 8800 - 0x4000 8BFF 1 KB SWPMI1
0x4000 8400 - 0x4000 87FF 1 KB Reserved
0x4000 8000 - 0x4000 83FF 1 KB LPUART1
0x4000 7C00 - 0x4000 7FFF 1 KB LPTIM1
0x4000 7800 - 0x4000 7BFF 1 KB OPAMP
0x4000 7400 - 0x4000 77FF 1 KB DAC
0x4000 7000 - 0x4000 73FF 1 KB PWR
0x4000 6800 - 0x4000 6FFF 2 KB Reserved
0x4000 6400 - 0x4000 67FF 1 KB CAN1
0x4000 6000 - 0x4000 63FF 1 KB CRS
0x4000 5C00- 0x4000 5FFF 1 KB I2C3
0x4000 5800 - 0x4000 5BFF 1 KB I2C2
0x4000 5400 - 0x4000 57FF 1 KB I2C1
0x4000 4C00 - 0x4000 53FF 2 KB Reserved
0x4000 4800 - 0x4000 4BFF 1 KB USART3
0x4000 4400 - 0x4000 47FF 1 KB USART2
0x4000 4000 - 0x4000 43FF 1 KB Reserved
0x4000 3C00 - 0x4000 3FFF 1 KB SPI3
0x4000 3800 - 0x4000 3BFF 1 KB SPI2
0x4000 3400 - 0x4000 37FF 1 KB Reserved
0x4000 3000 - 0x4000 33FF 1 KB IWDG
Table 17. STM32L431xx memory map and peripheral register boundary addresses
Bus Boundary address Size(bytes) Peripheral
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