Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet
Product codes
ATSAM4S-WPIR-RD
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
782
36.7.5.1 IrDA Modulation
For baud rates up to and including 115.2 Kb/s, the RZI modulation scheme is used. “0” is represented by a light
pulse of 3/16th of a bit time. Some examples of signal pulse duration are shown in
shows an example of character transmission.
Figure 36-34. IrDA Modulation
36.7.5.2 IrDA Baud Rate
the maximum acceptable error of ±1.87% must be met.
Table 36-12.
IrDA Pulse Duration
Baud Rate
Pulse Duration (3/16)
2.4 Kb/s
78.13 µs
9.6 Kb/s
19.53 µs
19.2 Kb/s
9.77 µs
38.4 Kb/s
4.88 µs
57.6 Kb/s
3.26 µs
115.2 Kb/s
1.63 µs
Bit Period
Bit Period
3
16
Start
Bit
Data Bits
Stop
Bit
0
0
0
0
0
1
1
1
1
1
Transmitter
Output
TXD
Table 36-13.
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