CYW20737
1.3 Infrared Learning
The CYW20737 includes hardware support for infrared learning. The hardware can detect both modulated and unmodulated signals.
For modulated signals, the CYW20737 can detect carrier frequencies between 10 kHz– 500 kHz and the duration that the signal is
present or absent. The CYW20737 firmware driver supports further analysis and compression of learned signal. The learned signal
can then be played back through the CYW20737 IR TX subsystem (see Figure 3).
Figure 3. Infrared RX
1.4 Security
CYW20737 provides elaborate mechanisms for implementing security and authentication schemes using:
■ RSA (Public Key Cryptography)
■ X.509 (excluding parsing)
■ Hash functions: MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512
■ Message authentication code: HMAC MD5, HMAC SHA-1
Note: Details on how to use this functionality via SDK are available in application notes on this topic.
1.5 Support for NFC Tag Based Pairing
CYW20737 provides support for "ease of pairing" and "secure key exchange" use cases using passive tags. Active tags can be used
with the chip for OOB pairing. In a typical use case, the BCM20203 (NFC tag) can be used to provide "tap to pair" functionality for
easy pairing.
Note: Details on how to use this functionality via SDK are available in application notes on this topic.
1.6 Bluetooth Smart Audio
CYW20737 supports using the BLE link for audio streaming. This functionality can be used for audio applications in toys, wearable,
and HID devices, as well as in hearing aids.
Note: Details on how to use this functionality via SDK are available in application notes on this topic.
Document Number: 002-16365 Rev. *C
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