Oki MSM7617 Manual Download Page 17

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¡ Semiconductor

MSM7617 Evaluation Board

* Usage Example 2: 2-Channel PCM Interface With 2-Channel Serial I/O

Evaluation is performed after connected to the existing multiplex PCM interface.
Settings : 2-channel serial I/O, PCM interface, external synchronization.

VR1

COMMON

MODE SW

IOM1 = 0 (ON)

IOM0 = 1 (OPEN)

ch1

MODE SW

ch2

MODE SW

VR2

VR3

JP1

JP2

JP10

JP9

JP13

+5 V

Evaluation Board

MSM7617

ROUT1

SYNC1

SCK

PCM
DATA

SIN1

Line Echo

Multiplexed PCM Lines

ADPCM Multiplexed

Lines

GND

RIN1 (RPCMI1)

ROUT (RPCMO1)

JP12

JP11

ch1 RST

VR4

ch2 RST

JP3

JP19

JP20

JP4

Digital Network

Wireless Interface

AFF

SOUT1 (SPCMO1)
SYNC1 (EXT.SYNC1)

SIN1 (SPCMI1)

SCK (EXT.SCK)

ADPCM

AFF

ch1

ch2

RIN1

SOUT1

SYNC1
SCK

ch1

ch2

Summary of Contents for MSM7617

Page 1: ...CM PWDWN ROUT1 SIN1 SOUT1 JP1 SYNC1 SCK SYNC 8 K SCK 128 K SYNC 8 K RST1 SCKO SYNCO RIN2 ROUT2 SIN2 SOUT2 SYNC2 CLKIN RST2 AIN1 2ch PCM CODEC MSM7617 2ch PCM CODEC AOUT1 AIN2 AOUT2 RIN1 ROUT1 SIN1 SOU...

Page 2: ...hannel parallel mode 2 channel serial mode 1 channel cross connected mode FTF mode 3 4 Vp p 600 W 3 4 Vp p 600 W min AOUT of PCM CODEC is output directly Note A 600 W resistor is mounted on the board...

Page 3: ...og Power Supply Input Pins Channel 1 Analog Signal Input Output Pins Channel 2 Analog Signal Input Output Pins RST SW S4 S3 S2 S5 S1 S7 S8 U3 U4 U2 U1 Pin Type Description RIN1 I Analog input pin for...

Page 4: ...ed to a PCM signal by a PCM CODEC to be provided as the RIN2 signal to the MSM7617 To use the RIN1 pin set JP4 RIN2 SEL to ANLG refer to the description of JP4 This input can be amplified about 0 to 1...

Page 5: ...scription of JP12 For external synchronization SYNC1 or SYNC2 also should be input externally The input frequency to EXT SCK is 64 to 2048 kHz EXT SYNC1 I SYNC1 input pin when an external sync signal...

Page 6: ...pin will be used for channel 1 RIN data PCM input mode PCM input data from the RPCMI1 pin will be used directly for channel 1 RIN data Analog input mode PCM data obtained by converting the analog inpu...

Page 7: ...or channel 2 RIN data PCM input mode PCM input data from the RPCMI2 pin will be used directly for channel 2 RIN data Open External input mode The external sync signal from the EXT SYNC1 pin will be us...

Page 8: ...so be input externally Internal input mode The sync signal set by JP10 INT SYNC2 will be used for SYNC2 Internal mode Depending on the setting of JP20 INT SCK SEL either the internal SCK SCKO or the S...

Page 9: ...oth SYNC and SCK are 50 duty waveforms INT SYNC SEL JP19 Jumper pins for switching the SYNC signal when INT SYNC is being used The SYNC and SCK generator is used only by Oki Electric for test so it ha...

Page 10: ...r SIN2 pin amp This pin can amplify approximately 0 to 12 dB ch1 RST SW S7 Reset switch for channel 1 echo canceller Press the reset switch after power is applied ch2 RST SW S8 Reset switch for channe...

Page 11: ...e Echo cancellation is performed by varying AFF coefficients OPEN Fixed AFF coefficient mode Coefficients are not varied Echo cancellation is performed with the coefficients at the point variation was...

Page 12: ...or provided for SIN Control takes 2 bits SAx1 SAx0 0 0 SIN ATT OFF 0 1 SIN ATT 6 dB 1 0 SIN ATT 12 dB 1 1 SIN ATT 18 dB Operation 5 6 7 RGC11 RGC10 RGC21 RGC20 Switches for setting operating level and...

Page 13: ...n 2100 Hz detection 1 0 Tone disable on 2100 Hz phase reversal detection 1 1 Not used Operation 6 ECM Switch to select old or new method for improving echo canceller acquisition ON Echo canceller oper...

Page 14: ...DWN Otherwise the clock is not distributed within the IC and the internal states will not stabilize which could damage the chip 4 Connect power supply and ground The evaluation board is basically divi...

Page 15: ...MODE SW IOM1 0 ON IOM0 0 ON ch1 MODE SW ch2 MODE SW VR2 VR3 JP1 JP2 JP10 JP9 JP13 5 V Evaluation Board MSM7617 RIN1 SOUT1 SYNC1 RIN2 SOUT2 SYNC2 SCK ROUT1 SIN1 ROUT2 ch1 ch2 SIN2 Line Echo PCM Line AD...

Page 16: ...and JP12 to EXT mode Fix JP10 to SYNC1 mode and JP13 to X tal mode 2 Referring to the diagram connect the equipment under test to the evaluation board Use wires as short as possible to connect the eq...

Page 17: ...onization VR1 COMMON MODE SW IOM1 0 ON IOM0 1 OPEN ch1 MODE SW ch2 MODE SW VR2 VR3 JP1 JP2 JP10 JP9 JP13 5 V Evaluation Board MSM7617 ROUT1 SYNC1 SCK PCM DATA SIN1 Line Echo Multiplexed PCM Lines ADPC...

Page 18: ...possible to connect the equipment under test to the evaluation board If the connecting lines are long noise or other factors can cause malfunction 3 Apply power and reset the test system set the mode...

Page 19: ...JP11 to ANLG mode or INT mode Set JP19 to SYNC0 mode and JP20 to SCK0 mode Fix JP10 to SYNC1 mode and JP13 to X tal mode 2 Referring to the diagram connect the equipment under test to the evaluation b...

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Summary of Contents for MSM7617

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Oki MSM7617, Manual, Page: 17 / 19

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