FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 149

• Manufacturer Part Number: FDC37C669_07
• Description: PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
• Manufacturer: SMSC [SMSC Corporation]

MIRTX
nMIRTX
DATA
IRTX
nIRTX
N otes:
1. IRTX: CRC Bit 1: 1 = XMIT active low
t1
t2
t3
t4
t5
t6
nIRTX: CRC Bit 1: 0 = XMIT active hig h
MIRTX, nMIR TX are the modu lated ou tp uts
FIGURE 12 - AMPLITUDE SHIFT KEYED IR TRANSMIT TIMING
Mod ulated Output Bit Time
Off Bit Time
Modul ated Output " On"
Modul ated Outp ut "Off"
Modul ated Output " On"
Modul ated Outp ut "Off"
0
t1
t3
t5
t4
t6
1
t2
Parameter
0
1
0
149
0
min
0 .8
0 .8
0 .8
0 .8
1
typ
1
1
1
1
1
max
1 .2
1 .2
1 .2
1 .2
0
units
1
µs
µs
µs
µs
µs
µs
1