Datasheet

947

SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

38.8.15 USART Baud Rate Generator Register

Name: US_BRGR

Address: 0x400A0020 (0), 0x400A4020 (1)

Access: Read/Write

This register can only be written if the WPEN bit is cleared in “USART Write Protection Mode Register” on page 955.

 CD: Clock Divider

 FP: Fractional Part

0: Fractional divider is disabled.

1–7: Baud rate resolution, defined by FP × 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

76543210

USART_MODE

≠ ISO7816

USART_MODE =

ISO7816

SYNC = 0 SYNC = 1

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)