CW6621 is a baseband controller compliant to Bluetooth 1.1 specification, and 1.2 partially for Adaptive frequency hopping and high speed connection . The data transfer rate over RF can be up to 721 kbps. It also supports authentication and encryption functions to provide Bluetooth security. It can be connected to various RF modules with BlueRF interface, supporting bi-directional interface Dbus. Besides, Silicon Wave SPI of RF chip is supported.

CW6621 supports both full-speed (12Mbps) USB(Universal Serial Bus), UART(Universal Asynchronous Receiver Transmitter), and SPI (Serial Port Interface) as the external host interface. For UART, it can be configured at different baud rates ranging from 57.6 kbps to 921 kbps. For SPI, CW6621 acts as SPI slave. The maximum SPI clock can be up to 2 MHz. CW6621 also implements one standard 4-wire interface for PCM Codec. This makes it easy to connect Conwise cw6693 to be capable of establishing one SCO link.

Features :

• Power supply is 3.3 volt typical with regulator built in
• Master clock rate is 13 MHz but 32 KHz for power saving
• Compliant to Bluetooth 1.1 specification, and 1.2 partially
• Adaptive Frequency Hopping (AFH) for Wi-Fi co-existence
• Support Faster connection
• Built-in Link Controller and Link Manager
• Support ACL multi-slot (3-slot and 5-slot) packets
• Support Authentication and Encryption
• Hold and sniff low power modes
• Support a variety of radio chips via BlueRF interface
• Support RSSI and radio power control
• Support SCO link for external PCM/CVSD digital audio interface
• Support CVSD encode/decode for voice bits stream through host
• Built-in HCI with USB 1.1 and UART (16C750-compatible) for general purpose USB dongle application
• Built-in SPI slave for external host interface
• USB PnP, Meet USB audio class driver, HID class driver of Microsoft OS
• Built-in CONWISE proprietary API commands for easy Bluetooth system development
• Built-in primary profiles including Generic Access Profile(GAP), Service Discovery Profile(SDP), Serial Port Profile, and Headset Profile.

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