Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK 데이터 시트
제품 코드
AT91SAM9N12-EK
829
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
40.8.19 USART Baud Rate Generator Register
Name:
US_BRGR
Addresses:
0xF801C020 (0), 0xF8020020 (1), 0xF8024020 (2), 0xF8028020 (3)
Access:
Read-write
This register can only be written if the WPEN bit is cleared in
• CD: Clock Divider
• FP: Fractional Part
0: Fractional divider is disabled.
1–7: Baud rate resolution, defined by FP x 1/8.
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
FP
15
14
13
12
11
10
9
8
CD
7
6
5
4
3
2
1
0
CD
CD
USART_MODE
≠
ISO7816
USART_MODE =
ISO7816
SYNC = 0
SYNC = 1
or
USART_MODE = SPI
(Master or Slave)
OVER = 0
OVER = 1
0
Baud Rate Clock Disabled
1 to 65535
Baud Rate =
Selected Clock/(16*CD)
Baud Rate =
Selected Clock/(8*CD)
Baud Rate =
Selected Clock/CD
Baud Rate =
Selected
Clock/(FI_DI_RATIO*CD)
Clock/(FI_DI_RATIO*CD)