DocID025832 Rev 2
STM32F042xx
Memory mapping
43
APB
0x4000 7C00 - 0x4000 7FFF
1 KB
Reserved
0x4000 7800 - 0x4000 7BFF
1 KB
CEC
0x4000 7400 - 0x4000 77FF
1 KB
Reserved
0x4000 7000 - 0x4000 73FF
1 KB
PWR
0x4000 6C00 - 0x4000 6FFF
1 KB
CRS
0x4000 6800 - 0x4000 6BFF0
1 KB
Reserved
0x4000 6400 - 0x4000 67FF
1 KB
BxCAN
0x4000 6000 - 0x4000 63FF
1 KB
USB/CAN RAM
0x4000 5C00 - 0x4000 5FFF
1 KB
USB
0x4000 5800 - 0x4000 5BFF
1 KB
Reserved
0x4000 5400 - 0x4000 57FF
1 KB
I2C1
0x4000 4800 - 0x4000 53FF
3 KB
Reserved
0x4000 4400 - 0x4000 47FF
1 KB
USART2
0x4000 3C00 - 0x4000 43FF
2 KB
Reserved
0x4000 3800 - 0x4000 3BFF
1 KB
SPI2
0x4000 3400 - 0x4000 37FF
1 KB
Reserved
0x4000 3000 - 0x4000 33FF
1 KB
IWDG
0x4000 2C00 - 0x4000 2FFF
1 KB
WWDG
0x4000 2800 - 0x4000 2BFF
1 KB
RTC
0x4000 2400 - 0x4000 27FF
1 KB
Reserved
0x4000 2000 - 0x4000 23FF
1 KB
TIM14
0x4000 0800 - 0x4000 1FFF
6 KB
Reserved
0x4000 0400 - 0x4000 07FF
1 KB
TIM3
0x4000 0000 - 0x4000 03FF
1 KB
TIM2
Table 17. STM32F042x peripheral register boundary addresses (continued)
Bus
Boundary address
Size
Peripheral