DATA
0
1
0
1
0
0
1
1
0
1
1
t2
t1
t2
t1
IRRX
n IRRX
Parameter
min
typ
max
units
t1 Pulse Width at 1 15kba ud
t1 Pulse Wid th at 57.6kba ud
t1 Pulse Wid th at 38.4kba ud
t1 Pulse Wid th at 19.2kba ud
t1 Pu lse Width a t 9.6kba ud
t1 Pu lse Width a t 4.8kba ud
t1 Pu lse Width a t 2.4kba ud
t2 Bit Time at 1 15kba ud
t2 Bit Time at 57.6kba ud
t2 Bit Time at 38.4kba ud
t2 Bit Time at 19.2kba ud
t2 Bi t Time a t 9.6kba ud
t2 Bi t Time a t 4.8kba ud
t2 Bi t Time a t 2.4kba ud
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
78
8.68
17.4
26
52
104
208
416
No te s:
1. Receive Pu lse Detection C rite ria: A re ceived p ulse is considered d etecte d if the
receivedpulse is a minimum of 1.41µs.
2. IR RX: L5, CRF 1 Bit 0 = 1
nIRRX: L5,
CRF1 Bit 0 = 0 (
default)
FIGURE 35 – IRDA RECEIVE TIMING
SMSC DS – LPC47M14X
Page 193
Rev. 03/19/2001
SMSC [ SMSC CORPORATION ]
