FDC37B727-NS Datasheet, PDF (233/238 Pages) SMSC Corporation – 128 Pin Enhanced Super I/O Controller with ACPI Support

IRDA SIR TRANSMIT
DAT A
0
1
0
1
0
0
1
1
0
1
1
t2
t1
IRT X
t2
t1
n IRT X
P aramet er
t1 Pulse Width at 115kbaud
t1 Pulse Widt h at 57. 6kbaud
t1 Pulse Widt h at 38. 4kbaud
t1 Pulse Widt h at 19. 2kbaud
t1 Pulse Widt h at 9. 6kbaud
t1 Pulse Widt h at 4. 8kbaud
t1 Pulse Widt h at 2. 4kbaud
t2 Bit T ime at 115kbaud
t2 Bit Time at 57.6kbaud
t2 Bit Time at 38.4kbaud
t2 Bit Time at 19.2kbaud
t2 Bit Tim e at 9.6kbaud
t2 Bit Tim e at 4.8kbaud
t2 Bit Tim e at 2.4kbaud
mi n
typ
max
u nits
1.41
1.6
2.71
µs
1.41
3.22
3.69
µs
1.41
4.8
5.53
µs
1.41
9.7
11.07
µs
1.41
19.5
22.13
µs
1.41
39
44.27
µs
1.41
78
88.55
µs
8.68
µs
17.4
µs
26
µs
52
µs
104
µs
208
µs
416
µs
Notes:
1. IrDA @ 115k i s HPSIR com pati ble. IrDA @ 2400 wi ll al low compatibilit y with HP95LX
and 48SX.
2. IRT X: L5, CRF 1 Bit 1 = 1 (default)
nI RT X: L5, CRF1 Bit 1 = 0
FIGURE 32 - IRDA SIR TRANSMIT TIMING
234