General Description
BlueCore® CSR8645™ BGA is a product from CSRs Connectivity Centre. It is a single-chip radio and baseband IC for Bluetooth 2.4GHz systems including basic rate and EDR to 3Mbps.
The integrated peripherals reduce the number of external components required, including no requirement for external codec, battery charger, SMPS, LDOs, balun or external program memory, ensuring minimum production costs.
The battery charger architecture enables the CSR8645 BGA to independently operate from the charger supply, ensuring dependable operation for all battery conditions.
The enhanced Kalimba DSP coprocessor with 80MIPS supports enhanced audio and DSP applications.
The integrated audio codec supports 2 channels of ADC, 2 digital microphone inputs and stereo output, as well as a variety of audio standards.

FEATUREs
■ 80MHz RISC MCU and 80MIPS Kalimba DSP
■ Internal ROM, serial flash memory and EEPROM interfaces
■ Stereo codec with 2 microphone inputs
■ Radio includes integrated balun
■ 5-band fully configurable EQ
■ CSRs latest CVC technology for narrowband and wideband voice connections including wind noise reduction
■ Wideband speech supported by HFP v1.6 profile and mSBC codec
■ Voice recognition support for answering a call, enables true hands-free use
■ Multipoint HFP connection to 2 phones for voice
■ Multipoint A2DP connection enables a headset (A2DP) connection to 2 A2DP source devices for music playback
■ Secure simple pairing, CSRs proximity pairing and CSRs proximity connection
■ Audio interfaces: I²S and PCM
■ Serial interfaces: UART, USB 2.0 (full-speed), I²C and SPI
■ aptX, SBC, MP3 and AAC decoder support
■ Wired audio support (USB and analogue)
■ Support for smartphone/tablet applications
■ Integrated dual switch-mode regulators, linear regulators and battery charger
■ External crystal load capacitors not required for typical crystals
■ 3 LED outputs
■ 68‑ball VFBGA 5.5 x 5.5 x 1mm 0.5mm pitch
■ Green (RoHS compliant and no antimony or halogenated flame retardants)

APPLICATIONs
■ Stereo headsets
■ Wired stereo headsets and headphones
■ Portable stereo speakers