Datasheet

809
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
36.8.15 USART Baud Rate Generator Register
Name: US_BRGR
Address: 0x40024020 (0), 0x40028020 (1)
Access: Read/Write
This register can only be written if the WPEN bit is cleared in “USART Write Protection Mode Register” on page 817.
• 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)