Datasheet

865
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
39.8.19 USART Baud Rate Generator Register
Name: US_BRGR
Address: 0xF801C020 (0), 0xF8020020 (1), 0xF8024020 (2), 0xF8028020 (3)
Access: Read-write
This register can only be written if the WPEN bit is cleared in “USART Write Protect Mode Register” on page 877.
• 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
76543210
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)