FDC37B78X View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

FDC37B78X

Enhanced Super I/O Controller with ACPI Support, Real Time Clock and Consumer IR

SMSC -> Microchip 

IRDA SIR TRANSMIT

DAT A

0

1

0

1

0

t2

t1

IRT X

t2

t1

n IRT X

0

1

1

0

1

1

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

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. I rDA @ 115k is HPSIR compatible. IrDA @ 2400 will allow compatibility with HP95LX

and 48SX.

2. IRT X: L5, CRF 1 Bit 1 = 1 (default)

nIRT X: L5, CRF1 Bit 1 = 0

FIGURE 31 - IRDA SIR TRANSMIT TIMING

255

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