GM82C803CN Datasheet, PDF (77/84 Pages) List of Unclassifed Manufacturers – 2.88 MB FDC/ Dual UARTs with FIFO/PIO(EPP/ ECP)/ IDE Interface/ S-IR/ PnP

5-3.7 IrDA
GM82C803CN
DATA
IRRX
IRRX
0101
t2
t1
t2 ^t1
00
11
011
Parameter
Min Typ Max Units
t1
Pulse Width at 115kbaud
1.4
1.6
2.71
t1
Pulse Width at 57.6kbaud
1.4
3.22 3.69
t1
Pulse Width at 38.4kbaud
1.4
4.8
5.53
t1
Pulse Width at 19.2kbaud
1.4
9.7
11.07
t1
Pulse Width at 9.6kbaud
1.4
19.5 22.13
t1
Pulse Width at 4.8kbaud
1.4
39
44.27
t1
Pulse Width at 2.4kbaud
1.4
78
88.55
t2
Bit Time at 115kbaud
8.68
t2
Bit Time at 57.6kbaud
17.4
t2
Bit Time at 38.4kbaud
26
t2
Bit Time at 19.2kbaud
52
t2
Bit Time at 9.6kbaud
104
t2
Bit Time at 4.8kbaud
208
t2
Bit Time at 2.4kbaud
416
Notes :
1. IrDA @ 115k is HPSIR compatible. IrDA @ 2400 will allow compatibility with HP95LX and
48SX.
2. TIR : CRC Bit 1 : 1 = XMIT active low
TIR : CRC Bit 1 : 0 = XMIT active high (default)
FIGURE3 - IrDA RECEIVE TIMING