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Bluetooth™ Module Application Note

AirLogic Co., Ltd.

All specification are preliminary and AirLogic reserves the right to change these without notice.

http://www.airlogic.co.kr

13.3.2 Line Input

If the input gain is set to less than 21dB ABM-400-Mxxx automatically selects line input mode.
In this mode the input impedance at AUDIO_IN_N_LEFT, AUDIO_IN_P_LEFT,
UDIO_IN_N_RIGHT and AUDIO_IN_P_RIGHT are increased to 130k

Ω

typically. In line-

input mode, the full-scale input signal is about 400mV rms.

Содержание ABM-400 Series

Страница 1: ...T Port 16 bit Stereo Audio CODEC 2 General Description ABM 400 Mxxx is a Class2 surface mountable Bluetooth Module for AV systems It provides fully compliant Bluetooth system for data and voice commun...

Страница 2: ...al extreme test 806 1000 KHz 2MHz 22 20 dBm 3MHz 46 40 dBm Adjacent channel power 4MHz 55 40 dBm F1avg 140 166 175 KHz F2max 115 149 KHz Modulation Characteristics F2avg F1avg 0 95 80 Initial Carrier...

Страница 3: ...Data plus 19 VDD_CORE Supply internal logic Voltage fixed 1 8V 20 PIO 7 Programmable I O Terminal 21 VDD_IO Supply I O Voltage PIO UART PCM 1 8 3 7V 22 PIO 5 Programmable I O Terminal 23 SPI_MOSI Ser...

Страница 4: ...it using a 2 2 F low ESR capacitor and 2 2 resistor be placed on the output VDD_CORE connected 1 8V 10 RESET ABM 400 Mxxx may be reset from several source RESET_IN pin power on reset a UART break char...

Страница 5: ...communicating with other serial device using the RS232 standard When ABM 400 Mxxx is connected to another digital device UART_RX and UART_TX transfer data between the two devices The remaining two sig...

Страница 6: ...tes as a USB peripheral responding to requests from a master host controller such as a PC Both the OHCI and the UHCI standards are supported The set of USB endpoints implemented behave as specificatio...

Страница 7: ...two independent channels Any ADC or DAC channel can be run at its own independent sample rate PCM Interface SPDIF Interface I2 S Interface PCM_OUT SPDIF_OUT SD_OUT PCM_IN SPDIF_IN SD_IN PCM_SYNC WS PC...

Страница 8: ...mono analogue input for voice band and audio band Stereo and mono analogue output for voice band and audio band Support for stereo digital audio bus standards such as I2S Support for IEC 60958 standa...

Страница 9: ...outes directly into the base band layer of the Module firmware It does not pass through the HCI protocol layer Hardware on ABM 400 Mxxx allows the data to be sent to the received from a SCO connection...

Страница 10: ...d has a 3 bit digital gain setting of the input amplifier in 3dB steps to optimize it for the use of different microphones 13 3 1 Microphone Input The input impedance at AUDIO_IN_N_LEFT AUDIO_IN_P_LEF...

Страница 11: ...3 2 Line Input If the input gain is set to less than 21dB ABM 400 Mxxx automatically selects line input mode In this mode the input impedance at AUDIO_IN_N_LEFT AUDIO_IN_P_LEFT UDIO_IN_N_RIGHT and AU...

Страница 12: ...is available as a differential signal between AOUT_N_LEFT and AOUT_P_LEFT for the left channel as shown in Figure 8 42 and between AOUT_N_R and AOUT_P_R for the right channel The output is capable of...

Страница 13: ...0 2 0 ABM 400 Mxxx PCB Layout Top view 1 12 22 34 44 1 78 1 0 2 0 0 9 0 5 0 7 Copyright 2005 AirLogic Co Ltd All specification are preliminary and AirLogic reserves the right to change these without n...

Страница 14: ...e preliminary and AirLogic reserves the right to change these without notice http www airlogic co kr 15 Ordering information M Multimedia Interface UA UART US USB BC BCSP A B M 4 0 0 M X X X Baud Rate...

Страница 15: ...he right to change these without notice http www airlogic co kr 16 Record of Changes Date Reason of Change NOV 2004 1 0 First Issue DEC 2004 MAY 2005 1 2 Operation Conditions change AirLogic Bluetooth...

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