DATA
0
1
0
1
0
0
1
1
0
1
1
t2
t1
IRTX
t2 t1
n IRTX
Parameter
t1 Pulse W idth at 115kbaud
t1 Pulse W idth at 57.6kbaud
t1 Pulse W idth at 38.4kbaud
t1 Pulse W idth at 19.2kbaud
t1 Pulse W idth at 9.6kbaud
t1 Pulse W idth at 4.8kbaud
t1 Pulse W idth at 2.4kbaud
t2 Bit Time at 115kbaud
t2 Bit Time at 57.6kbaud
t2 Bit Time at 38.4kbaud
t2 Bit Time at 19.2kbaud
t2 Bit Time at 9.6kbaud
t2 Bit Time at 4.8kbaud
t2 Bit Time at 2.4kbaud
min
1.41
1.41
1.41
1.41
1.41
1.41
1.41
typ
1.6
3.22
4.8
9.7
19.5
39
78
8.68
17.4
26
52
104
208
416
max
2.71
3.69
5.53
11.07
22.13
44.27
88.55
units
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
Notes:
1. IrDA @ 115k is HPSIR compatible. IrDA @ 2400 will allow compatibility with HP95LX
and 48SX.
2. IRTX: L5, CRF1 Bit 1: 1 = XMIT active low (default)
nIRTX: L5, CRF1 Bit 1: 0 = XMIT active high
FIGURE 20 - IrDA TRANSMIT TIMING
176