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BCM20704UA2KFFB1G Datasheet(PDF) 9 Page - Cypress Semiconductor |
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BCM20704UA2KFFB1G Datasheet(HTML) 9 Page - Cypress Semiconductor |
9 / 49 page Document Number: 002-14786 Rev. *E Page 9 of 49 CYW20704 3. Bluetooth Baseband Core The Bluetooth Baseband Core (BBC) implements all of the time critical functions required for high-performance Bluetooth operation. The BBC manages the buffering, segmentation, and routing of data for all connections. It also buffers data that passes through it, handles data flow control, schedules SCO/ACL TX/RX transactions, monitors Bluetooth slot usage, optimally segments and pack- ages data into baseband packets, manages connection status indicators, and composes and decodes HCI packets. In addition to these functions, it independently handles HCI event types and HCI command types. The following transmit and receive functions are also implemented in the BBC hardware to increase reliability and security of the TX/ RX data before sending over the air: Symbol timing recovery, data deframing, forward error correction (FEC), header error control (HEC), cyclic redundancy check (CRC), data decryption, and data dewhitening in the receiver. Data framing, FEC generation, HEC generation, CRC generation, key generation, data encryption, and data whitening in the trans- mitter. 3.1 Bluetooth Low Energy The CYW20704 supports dual-mode Bluetooth Low Energy (BT and BLE) operation. 3.2 Bluetooth 4.1 Features The CYW20704 supports the new features expected in Bluetooth v4.1. ■ Secure connections (LE/BR/EDR) ■ Fast advertising interval ■ Piconet clock adjust ■ Clock nudging ■ Connectionless Broadcast ■ LE enhanced privacy ■ Low duty cycle directed advertising ■ LE dual mode topology 3.3 Bluetooth 4.0 Features The CYW20704 supports all Bluetooth 4.0 features, with the following benefits: ■ Extended Inquiry Response (EIR) ■ Encryption Pause Resume (EPR) ■ Sniff Subrating (SSR) ■ Secure Simple Pairing (SSP) ■ Link Supervision Time Out (LSTO) ■ QoS enhancements |
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