HSDL-3020-021 Lite-On Electronics, HSDL-3020-021 Datasheet - Page 18

• Manufacturer Part Number: HSDL-3020-021
• Description: Infrared Transceivers IR Transceiver 4.0Mb/s
• Manufacturer: Lite-On Electronics

Specifications of HSDL-3020-021

• Wavelength: 875 nm
• Continual Data Transmission: 4 Mbit/s
• Transmission Distance: 50 cm
• Radiant Intensity: 10 mW/sr
• Half Intensity Angle Degrees: 30 deg to 60 deg
• Pulse Width: 4 us, 1.6 us
• Maximum Rise Time: 40 ns, 600 ns
• Maximum Fall Time: 40 ns, 600 ns
• Led Supply Voltage: 0 V to 6.5 V
• Maximum Forward Current: 190 mA
• Operating Voltage: 2.4 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Dimensions: 10.4 mm x 2.95 mm x 2.5 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

General Mobile Application Processor
Figure 3: HSDL-3020 configuration with general mobile architecture processor.
The transceiver is directly interfaced with the micropro-
cessor provided its support infrared communication
commonly known as Infrared Communications Port
(ICP). The ICP supports both SIR data rates, with up to
115.2 kps, and sometimes FIR data, with data rates up
to 4 Mbps. The remote control commands can be sent
to one of the available General Purpose IO pins or the
UART block with IrDA functionality. It should be ob-
served that although both IrDA data transmission and
Remote control transmission is possible simultaneously
by the hardware, 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 HSDL-3020.
18
IR_RxD
IR_TxD
IOV
GPIO
GPIO
CC
100 kW
100 kW
IOV
GND
CC
RC_VLED
CX6
GND
R3
IR_VLED
CX3
GND
CX7
V
CC
CX4
R2
CX5
R1
IOV
TxD_RC
RC_VLEDA
RXD
SD
TxD_IR
IR_VLEDA
V
RC LED CATHODE
CC
CC
HSDL-3020
CX1
CX2
NC
Remote Control Operation
The HSDL-3020 is spectrally suited to universal remote
control transmission function at 940 nm typically. Re-
mote control applications are not governed by any
standards, owing to which there are numerous remote
codes in market. Each of those standards results in re-
ceiver modules with different sensitivities, depending
on the carrier frequencies and responsively to the inci-
dent light wavelength. Remote control carrier frequen-
cies are in the range of 30 KHz to 60 KHz (for details of
some the frequently used carrier frequencies, please re-
fer to AN1314). Some common carrier frequencies and
the corresponding SA-1110 UART frequency and baud
rate divisor are shown in Table 3.
Table 3.
Remote Control Carrier
Frequency (kHz)
30
32, 33
36, 36.7, 38, 39.2, 40
56
GND
GND
SA-1110 UART
Frequency (kHz)
28.8
32.9
38.4
57.6
Baud Rate
Divisor
8
7
6
4