Microchip BM20 Bruksanvisning
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IS200X, IS201X, IS202X, BM1X, BM2X
Application Note
Revision History
Date
Revision Content
Version
May/4’2015
Release version
1.0
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Index
1. OVERVIEW .............................................................................................................................. 1
1.1 GENERAL DESCRIPTION ................................................................................................. 1
1.2 KEY FEATURE LIST: .......................................................................................................... 1
1.3 AVAILABLE PART NUMBER: ............................................................................................. 1
1.4 APPLICATION BLOCK DIAGRAM: .................................................................................... 3
2. IO ASSIGNMENT LIST ............................................................................................................ 3
2.1 FOR IS2013, IS2015, IS2020, IS2023, IS2025, BM15, BM20, BM23, BM25 ..................... 4
2.2 FOR IS2008, IS2010 .......................................................................................................... 4
2.3 FOR IS2021 .......................................................................................................................4
2.4 FUNCTION DESCRIPTION ...............................................................................................5
3. SYSTEM TURN ON/OFF APPLICATION ................................................................................ 6
3.1 POWER SWITCH TYPE SETTING .................................................................................... 6
3.2 AUTO POWER OFF FUNCTION ........................................................................................ 7
4. BATTERY CHARGER APPLICATION ..................................................................................... 8
4.1 BUILD IN BATTERY CHARGER ........................................................................................ 8
4.2 EXTERNAL CHARGER ...................................................................................................... 8
4.3 BATTERY STATUS DISPLAY IN APPLE iOS ..................................................................... 8
5 LINE-IN (AUX-IN) APPLICATION. .......................................................................................... 10
5.1 ADVANCED LINE-IN (AUX-IN) FUNCTION ..................................................................... 10
5.2 LINE-IN CIRCUIT ............................................................................................................. 11
6. VOICE PROMPT & MULTI TONE .........................................................................................12
6.1 VOICE PROMPT/MULTI TONE FUNCTION .................................................................... 12
6.2 TONE SETTINGG ............................................................................................................ 12
6.2 MULTI-TONE PROMPT ..................................................................................................... 14
7. BUZZER APPLICATION ........................................................................................................ 15
8. NFC TRIGGERS BLUETOOTH CONNECTION APPLICATION ........................................... 16
8.1 GENERAL INTRODUCTION FOR NFC APPLICATION ................................................... 16
8.1.1 NFC TAG FOR APPLICATION ............................................................................................. 16
8.1.2 NFC BEHAVIOR AFTER TRIGGERED .............................................................................. 16
8.2 ADDITIONAL NFC TRIGGER CIRCUIT ........................................................................... 17
8.3 NFC WRITER TOOL ........................................................................................................ 18
8.4 MP TOOL FOR NFC APPLICATION ................................................................................. 18
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9. AUDIO WITH AMPLIFIER APPLICATION ............................................................................20
9.1 BUILD-IN CLASS D AMPLIFIER ...................................................................................... 20
9.1.1 POWER TREE FOR INTERNAL CLASS-D AMP (CDA) .................................................. 20
9.2 EXTERNAL AUDIO AMPIFIER CIRCUIT ......................................................................... 21
9.2.1 AUDIO AMP SELECTION ..................................................................................................... 21
9.2.2 AUDIO AMP CIRCUIT DESIGN ........................................................................................... 21
9.2.3 AUDIO GAIN ADJUST GUIDELINE .................................................................................... 23
9.2.4 EXTERNAL AMP POWER ON TIMING CONTROL FOR POP NOISE FREE ............. 23
9.2.5 SOFT START FOR SINGLE END OUTPUT ...................................................................... 24
9.2.6 PCB LAYOUT GROUND PARTITION ................................................................................. 25
10. SPEAKER PHONE HOUSING DESIGN .............................................................................. 26
10.1 HOUSING DESIGN ........................................................................................................ 26
11. EXTERNAL MCU APPLICATION ........................................................................................ 27
11.1 OPERATION WITH EXTERNAL MCU ............................................................................ 27
12. I 2S APPLICATION ................................................................................................................. 5
13. ANTENNA PLACEMENT RULE ............................................................................................ 7
14. MISCELLANEOUS ................................................................................................................ 8
14.1 HEADSET APPLICATION ................................................................................................ 8
14.2 OPTIONAL RESET CIRCUIT ........................................................................................... 8
14.3 EEPROM DATA PROTECTION ........................................................................................ 9
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | Inte kategoriserad |
| Modell: | BM20 |
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