EVERLIGHT ELECTRONICS CO.,LTD.

Everlight Electronics Co., Ltd.

http:\\www.everlight.com

Rev 2

Page: 6 of 10

Device No：DMO-027-356

Prepared date：07-20-2005

Prepared by：

Carryll Hsu

IRM-27xxA SERIES

The Notice of Application:

Transmission o remote control signal consist of four parts: Encode Part, IR Transmitter Source,

IRM device, Decode Part

1. When IRM-27xxA code select frequency, it need to well understand the center system of encode

part.

2. Strong or weak light of IR Transmitter can affect distance of transmission.

3. When using IRM-27xxA device, it requires the composition of code pattern to reach the demand

as follows:

Minimum Burst Length tburst (number of pulses per burst) : 10 cycles

Minimum data pause time:

Remocon TX code with Repeat key

Remocon Tx code with Full frame Repeat

()

()

data

actual

gap

actual

n

Bn

gap

gap

actual

n

Bn

data

data

actual

T

T

s

T

T

T

s

T

T

T

,

,

,

,

0

.

2

150

150

∗

≥

−

−

=

−

−

=

∑

∑

µ

µ

Remocon TX repeat Code with minimum

burst length

(

T

T

r

gap

µ

150

0

.

2

+

∗

≥

4. It needs to ensure the translation range of decode part if it is applied to the pulse-width range.

If the above items hardly assure of its application, it’ll cause NG(no good) message from the edge

of signal.