SAM7X256_14 Datasheet, PDF (313/662 Pages) ATMEL Corporation – ARM-based Flash MCU

Figure 30-24. IrDA Modulation
Transmitter
Output
TXD
Start
Bit
0 10
Data Bits
1 ⁰⁰¹¹
Stop
Bit
01
Bit Period
3
16
Bit
Period
30.6.5.2 IrDA Baud Rate
Table 30-10 gives some examples of CD values, baud rate error and pulse duration. Note that the requirement on the
maximum acceptable error of ±1.87% must be met.
Table 30-10. IrDA Baud Rate Error
Peripheral Clock
Baud Rate
3 686 400
115 200
20 000 000
115 200
32 768 000
115 200
40 000 000
115 200
3 686 400
57 600
20 000 000
57 600
32 768 000
57 600
40 000 000
57 600
3 686 400
38 400
20 000 000
38 400
32 768 000
38 400
40 000 000
38 400
3 686 400
19 200
20 000 000
19 200
32 768 000
19 200
40 000 000
19 200
3 686 400
9 600
20 000 000
9 600
32 768 000
9 600
40 000 000
9 600
3 686 400
2 400
20 000 000
2 400
32 768 000
2 400
CD
Baud Rate Error
Pulse Time
2
0.00%
1.63
11
1.38%
1.63
18
1.25%
1.63
22
1.38%
1.63
4
0.00%
3.26
22
1.38%
3.26
36
1.25%
3.26
43
0.93%
3.26
6
0.00%
4.88
33
1.38%
4.88
53
0.63%
4.88
65
0.16%
4.88
12
0.00%
9.77
65
0.16%
9.77
107
0.31%
9.77
130
0.16%
9.77
24
0.00%
19.53
130
0.16%
19.53
213
0.16%
19.53
260
0.16%
19.53
96
0.00%
78.13
521
0.03%
78.13
853
0.04%
78.13
SAM7X Series [DATASHEET]
6120K–ATARM–11-Feb-14
313