10.9 External Regulators and Power Sequencing ....................................................................................... 66
10.10Reset, RST# ........................................................................................................................................ 66
10.10.1 Digital Pin States on Reset .................................................................................................... 67
10.10.2 Status After Reset .................................................................................................................. 68
11
Battery Charger ............................................................................................................................................ 69
11.1 Battery Charger Hardware Operating Modes ...................................................................................... 69
11.1.1 Disabled Mode ....................................................................................................................... 70
11.1.2 Trickle Charge Mode .............................................................................................................. 70
11.1.3 Fast Charge Mode ................................................................................................................. 70
11.1.4 Standby Mode ........................................................................................................................ 70
11.1.5 Error Mode ............................................................................................................................. 70
11.2 Battery Charger Trimming and Calibration .......................................................................................... 71
11.3 VM Battery Charger Control ................................................................................................................ 71
11.4 Battery Charger Firmware and PS Keys .............................................................................................. 71
11.5 External Mode ...................................................................................................................................... 71
12
Example Application Schematic ................................................................................................................... 73
13
Electrical Characteristics .............................................................................................................................. 74
13.1 Absolute Maximum Ratings ................................................................................................................. 74
13.2 Recommended Operating Conditions .................................................................................................. 75
13.3 Input/Output Terminal Characteristics ................................................................................................. 76
13.3.1 Regulators: Available For External Use ................................................................................. 76
13.3.2 Regulators: For Internal Use Only .......................................................................................... 78
13.3.3 Regulator Enable ................................................................................................................... 79
13.3.4 Battery Charger ...................................................................................................................... 79
13.3.5 USB ........................................................................................................................................ 81
13.3.6 Clocks .................................................................................................................................... 81
13.3.7 Stereo Codec: Analogue to Digital Converter ........................................................................ 82
13.3.8 Stereo Codec: Digital to Analogue Converter ........................................................................ 83
13.3.9 Digital ..................................................................................................................................... 84
13.3.10 LED Driver Pads .................................................................................................................... 85
13.3.11 Auxiliary ADC ......................................................................................................................... 85
13.3.12 Auxiliary DAC ......................................................................................................................... 86
13.4 ESD Protection .................................................................................................................................... 87
14
Power Consumption ..................................................................................................................................... 88
15
CSR Green Semiconductor Products and RoHS Compliance ..................................................................... 90
16
Software ........................................................................................................................................................ 92
16.1 CSR8640 Stereo Headset ................................................................................................................... 92
16.1.1 Advanced Multipoint Support ................................................................................................. 93
16.1.2 A2DP Multipoint Support ........................................................................................................ 93
16.1.3 Wired Audio Mode .................................................................................................................. 93
16.1.4 USB Modes Including USB Audio Mode ................................................................................ 94
16.1.5 Smartphone Applications (Apps) ............................................................................................ 94
16.1.6 Programmable Audio Prompts ............................................................................................... 94
16.1.7 CSR’s Intelligent Power Management ................................................................................... 95
16.1.8 Proximity Pairing .................................................................................................................... 96
16.1.9 Proximity Connection ............................................................................................................. 96
16.2 6
th
Generation 2-mic CVC Audio Enhancements ................................................................................ 96
Advance Information
This material is subject to CSR's non-disclosure agreement
© Cambridge Silicon Radio Limited 2011
Page 9 of 110
CS-209182-DSP1
CSR8640 BGA
Data Sheet
