Datasheet

779
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
Figure 40-33 shows an example of character transmission.
Figure 40-33. IrDA Modulation
40.7.5.2 IrDA Baud Rate
Table 40-12 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.
Bit Period
Bit Period
3
16
Start
Bit
Data Bits
Stop
Bit
0
0
0
0
0
1
11
1
1
Transmitter
Output
TXD
Table 40-12. IrDA Baud Rate Error
Peripheral Clock Baud Rate (Bit/s) CD Baud Rate Error Pulse Time (µs)
3,686,400 115,200 2 0.00% 1.63
20,000,000 115,200 11 1.38% 1.63
32,768,000 115,200 18 1.25% 1.63
40,000,000 115,200 22 1.38% 1.63
3,686,400 57,600 4 0.00% 3.26
20,000,000 57,600 22 1.38% 3.26
32,768,000 57,600 36 1.25% 3.26
40,000,000 57,600 43 0.93% 3.26
3,686,400 38,400 6 0.00% 4.88
20,000,000 38,400 33 1.38% 4.88
32,768,000 38,400 53 0.63% 4.88
40,000,000 38,400 65 0.16% 4.88
3,686,400 19,200 12 0.00% 9.77
20,000,000 19,200 65 0.16% 9.77
32,768,000 19,200 107 0.31% 9.77
40,000,000 19,200 130 0.16% 9.77
3,686,400 9,600 24 0.00% 19.53
20,000,000 9,600 130 0.16% 19.53
32,768,000 9,600 213 0.16% 19.53
40,000,000 9,600 260 0.16% 19.53
3,686,400 2,400 96 0.00% 78.13
20,000,000 2,400 521 0.03% 78.13
32,768,000 2,400 853 0.04% 78.13