IRDA SIR TRANSMIT
DATA
0
1
0
1
0
0
1
1
1
1
0
t2
t1
t2
t1
IRTX
n I RT X
mi n
Parameter
typ
max
units
1.41
1.41
1.41
1.41
1.41
1.41
1.41
t1
t1
t1
t1
t1
t1
t1
t2
t2
t2
t2
t2
t2
t2
Pulse Width at 115kbaud
Pulse Width at 57.6kbaud
Pulse Width at 38.4kbaud
Pulse Width at 19.2kbaud
Pulse Width at 9.6kbaud
Pulse Width at 4.8kbaud
Pulse Width at 2.4kbaud
Bit Time at 115kbaud
Bit Tim e at 57. 6kbaud
Bit Tim e at 38. 4kbaud
Bit Tim e at 19. 2kbaud
Bit Time at 9.6kbaud
1.6
3.22
4.8
2.71
3.69
µ s
µ s
µ s
µ s
µ s
µ s
µ s
µ s
µ s
µ s
µ s
µ s
µ s
µ s
5.53
9.7
11.07
22.13
44.27
88.55
19.5
39
78
8.68
17.4
26
52
104
208
416
Bit Time at 4.8kbaud
Bit Time at 2.4kbaud
Notes:
1. IrDA @ 115k is HPSIR compatible.
and 48SX.
IrDA @ 2400 willallow compatibility with HP95LX
2. IRTX: L5, CRF1 Bit 1 =1 (default)
nIRTX: L5, CRF1 Bit 1 = 0
FIGURE 31 - IRDA SIR TRANSMIT TIMING
255
SMSC [ SMSC CORPORATION ]
