Usart Register Map; Table 123. Usart Register Map And Reset Values - ST STM32F40 Series Reference Manual

Universal synchronous asynchronous receiver transmitter (USART)
26.6.8

USART register map

The table below gives the USART register map and reset values.

Table 123. USART register map and reset values

Offset Register
USART_SR
0x00
Reset value
USART_DR
0x04
Reset value
USART_BRR
0x08
Reset value
USART_CR1
0x0C
Reset value
USART_CR2
0x10
Reset value
USART_CR3
0x14
Reset value
USART_GTPR
0x18
Reset value
Refer to
793/1422
Reserved
Reserved
Reserved
Reserved
Table 2 on page 52 for the register boundary addresses.
Doc ID 018909 Rev 4
Reserved
Reserved
0
0
Reserved
0
0 0 1 1
0 0 0
DIV_Mantissa[15:4]
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
STOP
[1:0]
0 0 0 0 0 0 0 0
0 0 0 0 0 0
GT[7:0]
0 0 0 0 0 0 0 0 0
RM0090
0 0 0 0 0 0
DR[8:0]
0 0 0 0 0 0
DIV_Fraction
[3:0]
0 0 0 0 0 0
0 0 0 0 0 0
ADD[3:0]
0 0 0 0 0
0 0 0 0 0 0
PSC[7:0]
0 0 0 0 0 0