Contents
Device Details ................................................................................................................................................. 2
CSR8640 Stereo Headset Details .................................................................................................................. 3
Functional Block Diagram .............................................................................................................................. 4
1
Package Information ..................................................................................................................................... 13
1.1 Pinout Diagram .................................................................................................................................... 13
1.2 Pin Configuration ................................................................................................................................. 14
1.3 Device Terminal Functions .................................................................................................................. 15
1.4 Package Dimensions ........................................................................................................................... 21
1.5 PCB Design and Assembly Considerations ......................................................................................... 22
1.6 Typical Solder Reflow Profile ............................................................................................................... 22
2
Bluetooth Modem .......................................................................................................................................... 23
2.1 RF Ports ............................................................................................................................................... 23
2.1.1
BT_RF .................................................................................................................................... 23
2.2 RF Receiver ......................................................................................................................................... 23
2.2.1
Low Noise Amplifier ............................................................................................................... 23
2.2.2
RSSI Analogue to Digital Converter ....................................................................................... 23
2.3 RF Transmitter ..................................................................................................................................... 24
2.3.1
IQ Modulator .......................................................................................................................... 24
2.3.2
Power Amplifier ...................................................................................................................... 24
2.4 Bluetooth Radio Synthesiser ............................................................................................................... 24
2.5 Baseband ............................................................................................................................................. 24
2.5.1
Burst Mode Controller ............................................................................................................ 24
2.5.2
Physical Layer Hardware Engine ........................................................................................... 24
3
Clock Generation .......................................................................................................................................... 25
3.1 Clock Architecture ................................................................................................................................ 25
3.2 Input Frequencies and PS Key Settings .............................................................................................. 25
3.3 Crystal Oscillator: XTAL_IN and XTAL_OUT ....................................................................................... 25
3.3.1
Crystal Calibration .................................................................................................................. 25
3.3.2
Crystal Specification ............................................................................................................... 26
4
Bluetooth Stack Microcontroller .................................................................................................................... 27
4.1 VM Accelerator .................................................................................................................................... 27
5
Kalimba DSP ................................................................................................................................................ 28
6
Memory Interface and Management ............................................................................................................. 29
6.1 Memory Management Unit .................................................................................................................. 29
6.2 System RAM ........................................................................................................................................ 29
6.3 Kalimba DSP RAM .............................................................................................................................. 29
6.4 Internal ROM ....................................................................................................................................... 29
6.5 Serial Flash Interface ........................................................................................................................... 29
7
Serial Interfaces ............................................................................................................................................ 30
7.1 USB Interface ...................................................................................................................................... 30
7.2 UART Interface .................................................................................................................................... 30
7.3 Programming and Debug Interface ...................................................................................................... 32
7.3.1
Multi-slave Operation ............................................................................................................. 32
7.4 I²C EEPROM Interface ........................................................................................................................ 32
Advance Information
This material is subject to CSR's non-disclosure agreement
© Cambridge Silicon Radio Limited 2011
Page 7 of 110
CS-209182-DSP1
CSR8640 BGA
Data Sheet
