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FEBL7731-02-02

User’s Manual

for

MSM7731-02 Evaluation Board

Oki Electric Industry Co., Ltd.

Ver. 2.0

February 2000

Содержание MSM7731-02

Страница 1: ...FEBL7731 02 02 User s Manual for MSM7731 02 Evaluation Board Oki Electric Industry Co Ltd Ver 2 0 February 2000 1...

Страница 2: ...strial and intellectual property right etc is granted by us in connection with the use of the product and or the information and drawings contained herein No responsibility is assumed by us for any in...

Страница 3: ...1 11 Spare Area for Additional Amplifier 2 1 12 LED Indicator 2 1 13 On board Crystal 2 1 14 Measurement Location for External Oscilloscope 2 2 BOARD SCHEMATICS 3 3 FUNCTIONAL DESCRIPTIONS 3 3 1 Test...

Страница 4: ...to Set Cancellation Echo Delay Time 11 4 6 1 Single EC Mode Acoustic Echo Cancellation Mode 11 4 6 2 Dual EC Mode Acoustic and Line Echo Cancellation Mode 12 4 7 How to Set Noise Cancellation Levels 1...

Страница 5: ...and Ground Pin TP1 and TP2 The 12 V power supply is suitable for the evaluation in car environment as it is available for a cigarette lighter adapter and battery of an automobile In the board the sin...

Страница 6: ...s an option by using the area of U15 1 12 LED Indicator On board LEDs are used for the confirmation of the register contents 1 13 On board Crystal The 19 2 MHz crystal is equipped on the board An osci...

Страница 7: ...the evaluation board consists of external microcontroller interface pins When you want to evaluate your microcontroller connect the appropriate pins of the microcontroller to these pins When the micr...

Страница 8: ...ed when all the switches are set to ON 3 3 Toggle Switch SW Toggle switches are used for the register setting in the on board register mode and external MCU mode SW1 and SW10 are also used in the pin...

Страница 9: ...o Figure 3 1 of this user s manual 3 5 Variable Resistor RV 3 5 1 RV1 RV1 is a variable resistor to control the input gain from a microphone through the J1 MIC mini jack The MIC jack is connected to t...

Страница 10: ...er to Table 2 2 for details 1 CLKSEL External clock mode Internal clock mode 2 ECSEL Single EC mode Dual EC mode 3 MCUSEL MCU interface disabled MCU interface enabled 4 PCMSEL law PCM mode 16 bit line...

Страница 11: ...B 0 dB 0 1 6 dB 6 dB 1 0 12 dB 12 dB 1 1 18 dB 18 dB Table 2 4 Transmitting and Receiving Gain Adjustment RPAD4 RPAD3 RPAD2 RPAD1 TPAD4 TPAD3 TPAD2 TPAD1 Level 0 1 1 1 0 1 1 1 21 dB 0 1 1 0 0 1 1 0 18...

Страница 12: ...et for settings of DSW1 5 DSW 2 2 DSW2 5 DSW 2 7 DSW3 and DSW5 7 Set all the switches of DSW6 to ON 8 Connect TP3 to the cellular phone when the digital line interface is selected Connect TP5 or J2 an...

Страница 13: ...escription of the MSM7731 02 Data Sheet for setting of DSW2 5 SYNCSEL 3 Set all the switches of DSW6 to OFF 4 Set DSW1 DSW2 other than DSW2 1 DSW2 5 DSW3 DSW4 and DSW5 to 0 5 Connect TP3 to the cellul...

Страница 14: ...L Set to 1 Set to 0 Set to 0 DSW2 4 PCMSEL a Analog I F Mode Set to 0 b Digital I F Mode Setting at your choice Set to 0 Set to 0 DSW2 5 SYNCSEL Setting at your choice Setting at your choice Setting a...

Страница 15: ...nts of the register is displayed on LED2 to LED9 for confirmation LED2 to LED9 correspond to B0 to B7 of Control Registers CR respectively 4 6 How to Set Cancellation Echo Delay Time 4 6 1 Single EC M...

Страница 16: ...ues of cancellable echo delay time are 44 ms and 15 ms respectively In order to change the default values use the MCU mode using the external microcontroller or MCU mode using the on board register in...

Страница 17: ...er 4 6 1 of this manual Table 6 1 Noise Canceler Address Noise Canceler Address 1 Noise Canceler Address 2 Data to be written Noise Canceler Mode 01C8h 01C2h As per Table 6 2 Table 6 2 Noise Cancellat...

Страница 18: ...4 Level tuning of the path from MIN to SP with a cellular phone connected STEP 5 Level tuning of the path from MIC microphone to MOUT with a cellular phone connected and control of voice quality 5 2...

Страница 19: ...output by using a single tone a Maintain the previous PADs for controlling the echo canceler noise canceler and transmit receive gain as set in STEP 1 b Connect the audio analyzer HP made 8903B to th...

Страница 20: ...0 to disable NCPAD 7 AATT Set this switch to 0 to enable the acoustic attenuator 8 AGC Set this switch to 0 to enable the acoustic gain controller c Enable the communication between the far end cellul...

Страница 21: ...nd level control procedure is complete 6 PRECAUTIONS 1 The clock outputs SYNC BCLK are disabled during the power down reset mode Since the on board MCU control circuit is activated by the clock signal...

Страница 22: ...4 SW3 SW2 D7 D6 D5 D4 D3 D2 D1 D0 SW17 SW16 SW15 SW14 SW19 SW18 SW1 R W SET SW1 PDNRST RST LED2 LED3 LED4 LED5 LED6 LED7 LED8 LED9 D7 D6 D5 D4 D3 D2 D1 D0 RV2 RV5 RV1 RV4 CX15 U15 R18 R19 C26 Addition...

Страница 23: ...1 SB1 SB1 SB1 SB1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DSW2 DSW2 DSW3 DSW3 DSW3 DSW3 DSW3 DSW4 DSW4 DSW4 DSW4 DSW4 DSW5 DSW5 SB1 SB1 SB1 SB1 SB1 SB1 SB1 SB1 SB1 SB1 SB1 SB1 SB1 SB1 MSM7731 U1 32 31...

Страница 24: ...8 1 2 3 4 5 6 7 74HC02 U7 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 74HC161 U5 VCC CK1 D C B A SI QH 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 S L CLK E F G H QH GND 74HC165 U9 14 13 12 11 10 9 8 1 2 3 4 5...