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Q2426B View Datasheet(PDF) - Unspecified

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Q2426B Datasheet PDF : 81 Pages
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WM_PRJ_Q2400_PTS_002 - 002
24th January 2003
2.10 General Purpose Input/Output ...............................................................25
2.11 Analog to Digital Converter....................................................................27
2.12 Audio interface ......................................................................................27
2.12.1 Microphone inputs ........................................................................27
2.12.1.1 Common microphone inputs characteristics ............................28
2.12.1.2 Main Microphone Inputs (MIC2) ..............................................30
2.12.1.3 Auxiliary Microphone Inputs (MIC1) ........................................31
2.12.1.3.1 Differential connection .......................................................31
2.12.1.3.2 Single-ended connection....................................................32
2.12.2 Common speaker outputs characteristics ......................................33
2.12.2.1 Differential Connection.............................................................33
2.12.2.2 Single-ended Connection .........................................................33
2.12.3 Speaker outputs ............................................................................35
2.12.3.1 Speaker 2 Outputs ...................................................................35
2.12.3.2 Speaker 1 Outputs ...................................................................35
2.12.4 Buzzer Output ...............................................................................35
2.13 Battery charging interface .....................................................................36
2.13.1 Li-ion charging procedure ..............................................................38
2.13.2 How to define R1 and C1...............................................................38
2.14 ON / ~OFF ..........................................................................................39
2.14.1 Operating sequences .....................................................................40
2.14.1.1 Power ON ................................................................................40
2.14.1.2 Power OFF...............................................................................41
2.15 BOOT (optional).....................................................................................41
2.16 Reset signal (~RST) ...............................................................................42
2.16.1 Reset sequence .............................................................................44
2.17 External Interrupt (~INTR) .....................................................................44
2.18 VCC output ..........................................................................................45
2.19 VCC_RTC (Real Time Clock Supply)........................................................45
2.19.1 Interface description ......................................................................45
2.19.2 Typical implementation..................................................................46
2.19.2.1 Capacitor .................................................................................46
2.19.2.2 Super Capacitor .......................................................................46
2.19.2.3 Battery cell with regulator........................................................47
2.19.2.4 Non Rechargeable battery........................................................47
2.20 RF interface ..........................................................................................48
2.20.1 RF connections ..............................................................................48
2.20.2 RF performances ...........................................................................48
2.20.3 Antenna specifications ..................................................................49
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