FDC37B78X SMSC Corporation, FDC37B78X Datasheet - Page 253

• Manufacturer Part Number: FDC37B78X
• Description: Enhanced Super I/O Controller with ACPI Support/ Real Time Clock and Consumer IR
• Manufacturer: SMSC Corporation

Serial Port Infrared Timing
IRDA SIR RECEIVE
1. Receive Pulse Detection Criteria: A received pulse is considered
2. IRRX:
n IRRX
IRRX
DATA
t1
t1
t1
t1
t1
t1
t1
t2
t2
t2
t2
t2
t2
t2
received pulse is a minimum of 1.41µs.
nIRRX: L5, CRF1 Bit 0 = 0
Pulse Width at
Pulse Width at
Pulse Width at
Pulse Width at
Pulse Width at
Pulse Width at
Pulse Width at
Bit Time at
Bit Time at
Bit Time at
Bit Time at
Bit Time at
Bit Time at
Bit Time at
L5, CRF1 Bit 0
0
t2
t1
1
t2
Parameter
FIGURE 30 - IRDA SIR RECEIVE TIMING
t1
0
1
0
254
0
min
1.4
1.4
1.4
1.4
1.4
1.4
1.4
1
3.22
19.5
8.68
17.4
104
208
416
typ
1.6
4.8
9.7
39
78
26
52
1
max
11.07
22.13
44.27
88.55
2.71
3.69
5.53
0
1
units
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
1