Appendix C: General Application
Guide for the HSDL-3003 Infrared
IrDA Compliant 115.2 Kb/s
supports most remote control
codes. The design of the HSDL-
3003 also includes the following
unique features:
Interface to Recommended I/O Chips
The HSDL-3003’s TXD data input
is buffered to allow for CMOS
drive levels. No peaking circuit or
capacitor is required. Data rate
from 9.6 kb/s up to 115.2 kb/s is
available at the RXD pin. The
TXD_RC, (pin 7), or the
®
Transceiver
Description
• Spectrally suited to universal
remote control transmission
function at 940 nm typically.
The HSDL-3003, a wide-voltage
operating range infrared
transceiver is a low-cost and small • Low passive component count.
TXD_IrDA, (pin 3), can be used
to send remote control codes.
form factor device that is designed
• Shutdown mode for low power
to address the mobile computing
consumption requirement.
market such as PDAs, as well as
small embedded mobile products
such as digital cameras and
cellular phones. It is spectrally
suited to universal remote control
The block diagrams below show
how the IrDA port fits into a
mobile phone and PDA platform.
Selection of Resistor R1
Resistor R1 should be selected to
provide the appropriate peak
pulse LED current over different
transmission function at 940 nm
ranges of Vcc as shown on page 3
typically. It is fully compliant to
under "Recommended Application
Circuit Components".
IrDA 1.4 low power specification
from 9.6 kb/s to 115.2 kb/s, and
SPEAKER
AUDIO INTERFACE
DSP CORE
MICROPHONE
ASIC
CONTROLLER
RF INTERFACE
TRANSCEIVER
MOD/
DE-MODULATOR
IR RC
MICROCONTROLLER
USER INTERFACE
HSDL-3003
MOBILE PHONE PLATFORM
Figure 1. IR layout in mobile phone platform.
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