Ver. April 1998 MSM7731-01 Evaluation Board User's Manual Ge

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Ver. April 1998 MSM7731-01 Evaluation Board User's Manual Ge

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MSM7731-01 Evaluation Board User's Manual
Ver. April 1998
MSM7731-01 Evaluation Board User's Manual
General Descriptions
This user's manual Noise/Echo Canceller, MSM7731-01. evaluation board designed your 'turn-key' evaluation MSM7731-01 with following features; On-board Micro Controller Interface Circuit Easy internal control register without external micro controller. On-board Speaker Amplifier Microphone Input Circuit Realizes direct connection speaker microphone. Single power supply easy connection cigarette adopter specifications functions MSM7731-01, please refer device datasheet.
What Consists MSM7731-01 Evaluation
Evaluation Board (10.5 inch) Photo.1 shows Photograph (Top View) Board User's Manual (this document)
Board Schematics
Figure. shows schematic evaluation board.
Functional Descriptions
4-1. Power Supply
Single +12V power supply. Speaker amplifier operates other devices including MSM7731-01 operates
MSM7731-01 Evaluation Board User's Manual
Ver. April 1998
4-2. Port Control Interface
MSM7731-01 designated device state either from ports from MCU. When evaluating MSM7731-01 with this evaluation board port control mode, should set/change device state manipulating on-board switches (DSW1 DSW5).
4-3. (Micro Controller Unit) Interface
MSM7731-01 designated device state either from ports from MCU. When evaluating MSM7731-01 with this evaluation board control mode, further choose whether would utilize on-board would external you'll prepare yourself,
4-3-1. On-board Control
descriptions hereunder explain procedures on-board control; On-board Switches DSW6 "ON". WRITE D7~D0 (SWITCH SW9) A3~A0 (SWITCH SW14~SW17) appropriate values referring device datasheet. (SWITCH SW18) "W". (SWITCH SW19) "ON". D7~D0 (SWITCH SW2~SW9) A3-A0 (SWITCH SW14~SW17) appropriate values referring device datasheet. (SWITCH SW18) "R". (SWITCH SW19) "ON". Your values displayed LED2~LED9.
READ (for reconfirmation values)
4-3-2. External Control
descriptions hereunder explain procedures external control; DSW6 "OFF". Connect external port your (connected DEN, DIN, DOUT, EXCK pins MSM7731-01).
MSM7731-01 Evaluation Board User's Manual
Ver. April 1998
4-4. Analog Interface
This board input/output jacks; Acoustic side microphone input. This connected MSM7731-01. variable register control adjusting input gain. Acoustic side speaker output. This connected on-board speaker amplifier LM4861 National Semiconductor (U13). LM4861 input connected AOUT MSM7731-01. variable register control adjusting output gain. careful saturate input level LM4861. LM4861 device load performance. Line side analog input. This connected MSM7731-01. variable register control adjusting input gain. MOUT Line side analog output. This connected LOUT MSM7731-01. variable register control adjusting output gain. [Note] reserved additional amplifiers (+5V).
4-5. Digital Interface
line-side interface, MSM7731-01 provides only digital interface also analogue interface such IS-95 handsets. When like utilize this digital line-side interface provided with MSM7731-01, connect external digital interface (SYNC, BCLK, PCMI, PCMEI, PCMO, PCMEO pins MSM7731). JUMPER on-board pull-up/pull-down control. ("0" pull-down pull-up "Remove pull-up/pull-down)
4-6. Clock Input
board 19.2MHz X'tal available. [Note] reserved oscillator.
MSM7731-01 Evaluation Board User's Manual
Ver. April 1998
Figure
Board Schematic (1/3)
MSM7731-01 Evaluation Board User's Manual
Ver. April 1998
Figure
Board Schematic (2/3)
slide-type switch
snap-type switch toggle-type switch
slide-type switch
MSM7731-01 Evaluation Board User's Manual
Ver. April 1998
Figure
Board Schematic (2/3)
MSM7731-01 Evaluation Board User's Manual
Ver. April 1998
Photo.1 Photograph board (Top Vies)

Ver. April 1998 MSM7731-01 Evaluation Board User's Manual Ge

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