DATA
0
1
0
1
0
0
1
1
0
1
1
t2
t1
t2
t1
IRRX
nIRRX
Parameter
min
typ
max
units
t1
t1
t1
t1
t1
t1
t1
t2
t2
t2
t2
t2
t2
t2
Pulse Width at 115kbaud
1.4
1.4
1.4
1.4
1.4
1.4
1.4
1.6
3.22
4.8
9.7
19.5
39
2.71
3.69
5.53
11.07
22.13
44.27
88.55
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
Pulse Width at57.6kbaud
Pulse Width at38.4kbaud
Pulse Width at19.2kbaud
Pulse Width at 9.6kbaud
Pulse Width at 4.8kbaud
Pulse Width at 2.4kbaud
Bit Time at 115kbaud
Bit Time at 57.6kbaud
Bit Time at 38.4kbaud
Bit Time at 19.2kbaud
Bit Time at 9.6kbaud
78
8.68
17.4
26
52
104
208
416
Bit Time at 4.8kbaud
Bit Time at 2.4kbaud
Notes:
1. Receive Pulse Detection Criteria: A received pulse is considered detectedif the
received pulse is a minimum of 1.41µs.
2. IRTX: CRC Bit 0: 1 = RCV active low
nIRTX: CRC Bit 0: 0 = RCV active high
FIGURE 10 - IrDA RECEIVE TIMING
146
SMSC [ SMSC CORPORATION ]
