RM0366 Datasheet, PDF (762/868 Pages) STMicroelectronics – This reference manual targets application developers

RM0366
Universal synchronous asynchronous receiver transmitter (USART)
26.7.4
Baud rate register (USARTx_BRR)
This register can only be written when the USART is disabled (UE=0). It may be
automatically updated by hardware in auto baud rate detection mode.
Address offset: 0x0C
Reset value: 0x0000
31
Res.
30
Res.
29
Res.
28
Res.
27
Res.
26
Res.
25
Res.
24
Res.
23
Res.
22
Res.
21
Res.
20
Res.
19
Res.
18
Res.
17
Res.
16
Res.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
BRR[15:0]
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Bits 31:16 Reserved, must be kept at reset value.
Bits 15:4 BRR[15:4]
BRR[15:4] = USARTDIV[15:4]
Bits 3:0 BRR[3:0]
When OVER8 = 0, BRR[3:0] = USARTDIV[3:0].
When OVER8 = 1:
BRR[2:0] = USARTDIV[3:0] shifted 1 bit to the right.
BRR[3] must be kept cleared.
26.7.5
Guard time and prescaler register (USARTx_GTPR)
Address offset: 0x10
Reset value: 0x0000
31
Res.
30
Res.
29
Res.
28
Res.
27
Res.
26
Res.
25
Res.
24
Res.
23
Res.
22
Res.
21
Res.
20
Res.
19
Res.
18
Res.
17
Res.
16
Res.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
GT[7:0]
PSC[7:0]
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DocID025203 Rev 2
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