TMD4903 datasheet(66/86 Pages) OSRAM

66 / 86 page

Datasheet, Public

Page 65

[v2-00] 2022-Nov-03

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TMD4903 − Application Information

Figure 76:

Number of Repeated Sub-Pattern Loops

Protocols with “Repeated” Sub-Patterns: The blue box represents a repeated part of a pattern. These

sub-patterns begin at an address within the red box and burst until the end of the pattern is encountered. The

repeated sub-pattern can be reiterated 1 to 254 times, or continuously.

Digital Logic

The Simplified Flow Diagram depicts the basic premise of how

an entire waveform is generated. Protocols of the form

described in Figure 75 and Figure 76 can be generated using

the mechanism depicted below. Any functionality show in the

red, blue, or green boxes can be activated or omitted via control

virtually any waveform.

Typically, patterns are built by assembling pulses and gaps in a

particular order. To this end the length of time for each pulse

and gap, measured in multiples of carrier periods, as well as the

order of each pulse/gap pair are specified in the

equipment/button data. The remote control engine can directly

accept the data in this format. Pulse/Gap order is stored in

pattern RAM and pulse/gap time durations are stored in the

Timewords table.

Pause

Loop ISNL Times

Loop IPNL Times

IDLE

START

IDLE

Protocols with Repeated

Sub-Patterns

Repeat

Sub-

pattern

“Run-once”

Sub-

pattern

TMD4903 Datasheet(PDF) 66 Page - OSRAM GmbH