DATA
IRTX
1
0
1
0
0
1
1
1
1
0
0
t2
t1
t2
t1
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
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 Time at 57.6kbaud
Bit Time at 38.4kbaud
Bit Time 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
t1
t1
t1
t1
t1
t1
t2
t2
t2
t2
t2
t2
t2
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.
IrDA @ 2400 willallow compatibility with HP95LX
and 48SX.
2. IRT X: L5, CRF 1 B it 1 = 1 (def ault)
nIRTX: L5, CRF1 Bit 1 =0
FIGURE 36 – IRDA TRANSMIT TIMING
SMSC DS – LPC47M14X
Page 194
Rev. 03/19/2001
SMSC [ SMSC CORPORATION ]
