ASDL-3023-021 Avago Technologies US Inc., ASDL-3023-021 Datasheet - Page 20

• Manufacturer Part Number: ASDL-3023-021
• Description: Infrared Transceivers SFF FIR+RC Front w/o Shield
• Manufacturer: Avago Technologies US Inc.

Specifications of ASDL-3023-021

• Wavelength: 885 nm, 875 nm
• Continual Data Transmission: 4 Mbit/s
• Transmission Distance: 30 cm
• Radiant Intensity: 50 mW/sr
• Half Intensity Angle Degrees: 15 deg
• Pulse Width: 4 us, 1.6 us
• Maximum Rise Time: 60 ns, 600 ns
• Maximum Fall Time: 60 ns, 600 ns
• Led Supply Voltage: - 0.3 V to 6 V
• Operating Voltage: 2.4 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Dimensions: 7.5 mm x 2.75 mm x 1.75 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

General mobile application processor
The transceiver is directly interface with the micropro-
cessor provided its support infrared communication
commonly known as Infrared Communications Port
(ICP). The ICP supports both SIR data rates up to 115.2kps
and sometimes FIR data with data rates up to 4Mbps.
The remote control commands can be sent one of the
available General Purpose IO pins or the UART block
with IrDA functionality. It should be should be observed
that although both IrDA data transmission and Remote
control transmission is possible simultaneously by the
hardware, hence the software is required to resolve this
issue to prevent the mixing and corruption of data while
being transmitted over the free air. The above Figure 3
illustrates a reference interfacing to implement both IR
and RC functionality with ASDL-3023.
Figure 3. ASDL-3023 configuration with general mobile architecture processor
0
IR_RXD
IR_TXD
IOVCC
GPIO
GPIO
100Kohm
IOVCC
GND
GND
100Kohm
VCC
CX3
GND
CX5
VLED
GND
R1
CX4
R3
Remote Control Operation
The ASDL-3023 is spectrally suited to universal remote
control transmission function at 940nm typically. Remote
control applications are not governed by any standards,
owing to which there are numerous remote codes
in market. Each of those standards results in receiver
modules with different sensitivities, depending on the
carries frequencies and responsively to the incident light
wavelength. Remote control carrier frequencies are in
the range of 30KHz to 60KHz (for details of some the fre-
quently used carrier frequencies, please refer to AN1314).
Some common carrier frequencies and the correspond-
ing SA-1110 UART frequency and baud rate divisor are
shown in Table 3.
Table 3.
Remote Control Carrier
Frequency (KHz)
0
,
6,6.7,8,9.,40
56
TXD_RC
RXD
IOVCC
SD
TXD_IR
VCC
VLEDA
CX1
CX2
HSDL3021
GND
GND
SA-1110 UART
Frequency (KHz)
8.8
.9
8.4
57.6
Baud Rate
Divisor
8
7
6
4