BCM20706 Data Sheet
Infrared Learning
Figure 6: Infrared TX
VCC
R1
62
D1 Infrared-LD
R2
Q1
MMBTA42
BCM20706 IR TX
2.4K
Infrared Learning
The BCM20706 includes hardware support for infrared learning. The hardware can detect both modulated and
unmodulated signals. For modulated signals, the BCM20706 can detect carrier frequencies between 10 kHz
and 500 kHz, and the duration that the signal is present or absent. The BCM20706 firmware driver supports
further analysis and compression of the learned signal. The learned signal can then be played back through the
BCM20706 IR TX subsystem (see Figure 7).
Figure 7: Infrared RX
VCC
D2 Photodiode
BCM20706 IR RX
Broadcom®
Bluetooth SoC
May 19, 2016 • 20706-DS202-R
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BROADCOM CONFIDENTIAL
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