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KT0646M

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KT0646M

Monolithic Digital UHF-band Transmitter

Low Power Wireless-Mic-on-a-Chip™

 Features

Fully integration

Low noise Microphone interface

High fidelity digital audio processing

High power output PA

Worldwide full band support

UHF: 470MHz~960MHz

Professional Grade Performance:

Audio DR≥ 106 dB

Flat audio response: 20Hz~18KHz

Low Distortion: <0.3%

High power output capacity: 18dBm

Ultra-Low Power Consumption:

operation current < 60mA @14dBm

standby current < 22 µA

Advanced Features

Digital Auxiliary Channel

Programmable Transmit Power

FM adjustable bandwidth

Programmable Compandor Time-Constant

Optional pilot

Built-in pre-emphasis，Time-Constant 75µs or

50µs

Compression and pre emphasis adjustable

Built-in Low-Battery Detector

No on/off noise

No disturbing noise

Adjustable 15 stage equalizer

Adjustable Echo function

Adjustable audio AGC function

Adjustable audio ALC function

Microphone audio input signal detection

Small Form Factor

24-pins QFN 4x4

Simple Interface:

Standard 2-wire MCU interface

绿色环保

Pb-free and RoHS Compliant

 Applications

Wireless Microphone、Wireless Speaker、Soundbar、

Portable loudspeaker, guide machine, teaching machine

Rev. 1.2

Information furnished by KT Micro, Inc. is believed to be accurate and reliable.

However, no responsibility is assumed by KT Micro, Inc. for its use, nor for any

infringements of patents or other rights of third parties which may result from its

use. No license is granted by implication or otherwise under any patent or patent

rights of KT Micro, Inc

AUDIO PGA

Audio Process

Crystal

Channel

Selection

2-wire

Battery ADCRegulator

MIC_INP

SDA

SCL

VDD GND VBAT_DET

XO1

PA_OUTP

PA_OUTN

Pilot &

Digital Auxiliary

Channel

Echo

ECHO_RATIO ECHO_DELAY XO2

MIC_INN

KT0646M System Diagram

 Description

KT0646M is the second generation UHF-band wireless

transmitter chip used of the unique design and low power

consumption technology patent protection, based on first

generation product performance, will greatly reduce the

power consumption, can be used for more occasions,

especially portable etc. of power demanding products.

KT0646M integrates a wealth of features that can further

reduce overall BOM costs and improve product consistency

and reliability. Among them, the integrated 15 segment

audio equalizer allows users to freely and flexibly adjust

the audio frequency response to achieve the best sound

effect. The Echo feature increases the echo effect of the

sound and improves the sound effect.

KT0646M integrates the functions of audio AGC and audio

ALC to improve the dynamic range and noise performance,

and can effectively adjust the frequency offset and

bandwidth of the transmitted signal.

Optimization of KT0646M audio compression, with the

KT065x series product can effectively optimize the tail,

distortion and noise floor

KT0646M also has the function of auxiliary digital

channel, with the KT Micro receiver chip, can realize

automatic frequency, remote control, code, information

transmission and other functions

KT Micro, Inc.

BeiWu New Technology Park, Building #4, 23 BeiWuCun

Road, HaiDian District, Beijing, China.

Tel: +86-10-88891955 http://www.ktmicro.com.cn

Fax: +86-10-88891977

KT0646M

 Description .............................................................................................................................................. 1

1. Electrical Specification ............................................................................................................................ 4

2. Pin List .................................................................................................................................................... 7

3. Function Description ............................................................................................................................... 9

3.1. Overview ............................................................................................................................................. 9

3.2. Power-up and Standby ...................................................................................................................... 9

3.3. Crystal ................................................................................................................................................. 9

3.4. Microphone Interface .......................................................................................................................10

3.5. Audio AGC ........................................................................................................................................11

3.6. Audio ALC .........................................................................................................................................11

3.7. Audio equalization ............................................................................................................................15

3.8. Echo ....................................................................................................................................................15

3.9. Silence Mute and Audio signal detection ........................................................................................17

3.10. Pre emphasis ......................................................................................................................................17

3.11. Audio compressor ..............................................................................................................................17

3.12. Channel selection ...............................................................................................................................18

3.13. Transmission Power ..........................................................................................................................19

3.14. Digital Auxiliary Channel .................................................................................................................19

3.15. Battery voltage detection ..................................................................................................................19

3.16. 2-wire interface ..................................................................................................................................20

3.17. Register Bank ....................................................................................................................................22

3.17.1. MANUFACTURER_ID (Address 0x01) ......................................................................................22

3.17.2. BURST_DATA (Address 0x02) ...................................................................................................22

3.17.3. SYSCFG (Address 0x03) ..............................................................................................................22

3.17.4. BATTERY (Address 0x07) ...........................................................................................................22

3.17.5. CHAN_REGA (Address 0x08) .....................................................................................................22

3.17.6. CHAN_REGB (Address 0x09) .....................................................................................................22

3.17.7. CALI_CFG (Address 0x0A) .........................................................................................................23

3.17.8. PLL_STATE (Address 0x0D) .......................................................................................................23

3.17.9. POWER_CFG (Address 0x0F) .....................................................................................................23

3.17.10. PA_GAIN_CFG (Address 0x11) ..................................................................................................23

3.17.11. AUX_RESERVED_REG1 (Address 0x12) ..................................................................................23

3.17.12. AUX_RESERVED_REG2 (Address 0x13) ..................................................................................23

3.17.13. AUX_RESERVED_REG3 (Address 0x14) ..................................................................................24

3.17.14. TX_ID (Address 0x17) ..................................................................................................................24

3.17.15. DSP_CFGA (Address 0x1C) .........................................................................................................24

3.17.16. DSP_CFGC (Address 0x1E) .........................................................................................................25

3.17.17. PILOT_CFG (Address 0x1F) ........................................................................................................25

3.17.18. AUX_ADDR1 (Address 0x20) .....................................................................................................25

3.17.19. AUX_ADDR2 (Address 0x21) .....................................................................................................25

3.17.20. GPIO_CFG (Address 0x24) ..........................................................................................................26

3.17.21. SLNC_CFGA (Address 0x25) ......................................................................................................26

3.17.22. SLNC_CFGB (Address 0x26) .......................................................................................................27

3.17.23. AUX_RESERVED_REG4 (Address 0x27) ..................................................................................27

3.17.24. DSP_CFGB (Address 0x2B) .........................................................................................................28

3.17.25. DSP_PGA_CFGA(Address 0x30) ................................................................................................28

3.17.26. DSP_PGA_CFGB(Address 0x31) .................................................................................................28

3.17.27. DSP_ECHO_CFGA(Address 0x32)..............................................................................................29

3.17.28. DSP_EQ_CFGA(Address 0x34) ...................................................................................................29

3.17.29. DSP_EQ_CFGB (Address 0x35) ..................................................................................................31

3.17.30. DSP_EQ_CFGC (Address 0x36) ..................................................................................................32

3.17.31. DSP_EQ_CFGD (Address 0x37) ..................................................................................................34

3.17.32. DSP_EQ_CFGE (Address 0x38) ..................................................................................................35

3.17.33. DSP_HL_CP_CFG (Address 0x39) ..............................................................................................37

3.17.34. DSP_ALC_CFG (Address 0x3A) .................................................................................................38

3.17.35. STATUS_A (Address 0x3E) .........................................................................................................38

3.17.36. SPARE_A (Address 0x47) ............................................................................................................39

4. Typical Application Circuit ....................................................................................................................40

剩余46页未读，继续阅读

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