Datasheet

812
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
36.8.18 USART FI DI RATIO Register
Name: US_FIDI
Address: 0x40024040 (0), 0x40028040 (1)
Access: Read/Write
Reset: 0x174
This register can only be written if the WPEN bit is cleared in “USART Write Protection Mode Register” on page 817.
• FI_DI_RATIO: FI Over DI Ratio Value
0: If ISO7816 mode is selected, the baud rate generator generates no signal.
1– 2047: If ISO7816 mode is selected, the baud rate is the clock provided on SCK divided by FI_DI_RATIO.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
––––– FI_DI_RATIO
76543210
FI_DI_RATIO