37M602 Datasheet, PDF (175/182 Pages) SMSC Corporation – ENHANCED SUPER I/O CONTROLLER WITH INFRARED SUPPORT

DATA
0
101
0
0
11
0 11
IRRX
t2
t1
t2 _t1
n IRRX
Parameter
t1 Pulse Width at 115kbaud
t1 Pulse Width at 57.6kbaud
t1 Pulse Width at 38.4kbaud
t1 Pulse Width at 19.2kbaud
t1 Pulse Width at 9.6kbaud
t1 Pulse Width at 4.8kbaud
t1 Pulse Width 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
typ max units
1.4
1.6
2.71
µs
1.4 3.22 3.69
µs
1.4
4.8
5.53
µs
1.4
9.7 11.07 µs
1.4 19.5 22.13 µs
1.4
39 44.27 µs
1.4
78 88.55 µs
8.68
µs
17.4
µs
26
µs
52
µs
104
µs
208
µs
416
µs
Notes:
1. Receive Pulse Detection Criteria: A received pulse is considered detected if the
received pulse is a minimum of 1.41µs.
2. IRRX: L5, CRF1 Bit 0: 1 = RCV active low
nIRRX: L5, CRF1 Bit 0: 0 = RCV active high (default)
FIGURE 19 - IrDA RECEIVE TIMING
175