
793
SAM4CP [DATASHEET]
43051E–ATPL–08/14
36.7.18 USART FI DI RATIO Register
Name:
US_FIDI
Address:
0x40024040 (0), 0x40028040 (1), 0x4002C040 (2), 0x40030040 (3), 0x40034040 (4)
Access:
Read/Write
Reset:
0x174
This register can only be written if the WPEN bit is cleared in the
“USART Write Protection Mode Register” on page 798
.
FI_DI_RATIO: FI Over DI Ratio Value
0: If ISO7816 mode is selected, the baud rate generator generates no signal.
1 - 2: Do not use.
3 - 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
7
6
5
4
3
2
1
0
FI_DI_RATIO