EV6090 CMLMICRO | Alldatasheet

Document overview

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Technical content

Datasheet sections

  • 1 Block Diagrams
  • 2 Preliminary Information
  • 2.1 Laboratory Equipment
  • 2.2 Handling Precautions
  • 2.2.1 Static Protection
  • 2.2.2 Contents - Unpacking
  • 3 Operation
  • 3.1 Set-Up
  • 3.1.1 Default Jumper Configuration
  • 3.1.2 Connect external regulated power supply
  • 3.1.3 Set Mode of Operation
  • 3.1.4 Quick Test
  • 3.1.5 Further experimentation
  • 3.2 Adjustments
  • 3.3 Operation
  • 3.3.1 E3 Audio Input routing (to the CVSD encoder)
  • 3.3.2 E4 Audio output routing (from the CVSD decoder)
  • 3.3.3 S1 and S2 Switch Settings
  • 4 Schematic Diagrams and PCB Layout
  • 5 Specifications

COMMUNICATION SEMICONDUCTORS EV6090 USER MANUAL CMX639 CVSD CODEC Evaluation Kit 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective comp anies. ADVANCE INFORMATION

  • CMX639 Product Evaluation
  • Telephone Handset Connectors
  • On-board Speaker Driver
  • Variable Gain Input Amplifier
  • Selectable Sample Clock Rates
  • Easy Jumper/Switch configuration
  • User Prototyping PCB Area x(-1) x(-47) /c83 -20dB to +20dB 0dB to -6dB Speaker Driver +20dB Computer Interface Direct Out P1: 1 XTAL Switch Control (Local) V+I N VDD I N AGND V-I N Power Conditioning Telephone Handset (Mic) Telephone Handset (Earpiece) CMX639 Audio +In Audio -In Input Conditioning Gain Block Direct In P1: 2 P1: 3,4 Data Rate (2) Algorithm Force Idle (2) Data En Powersave Mic Input Dec In /c68M /c68M Enc In Dec Out Enc Out Dec In Data Clocks The EV6090 is a single board evaluation platform used for the evaluation of the CMX639 CVSD codec. The board is powered from an external supply that can be used to evaluate CVSD encoder and decoder performance at different supply voltages. Jumpers are provided to select signal paths, clock source, measure device current, etc. Convenient I/O allows connection to a telephone handset, microphone, and/or a loudspeaker for simple experiments.

CVSD CODEC Evaluation Kit 3 EV6090 Evaluation Kit 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective comp anies.

1 Block Diagrams

x(-1) x(-47) /c83 -20dB to +20dB 0dBto-6dB SpeakerDriver+20dB ComputerInterface Direct Out P1: 1 XTAL Switch Control (Local) I N VDD I N AGNDV- I N Power Conditioning Telephone Handset (Mic) TelephoneHandset(Earpiece) CMX639 Audio +InAudio -In Input Conditioning Gain Bloc k Direct In P1: 2 P1: 3,4 Data Rate (2)Algorithm Force Idle (2)Data En Powersave Mic Input Dec In /c68M /c68M Enc In Dec Out Enc Out Dec In DataClocks Figure 1: Block Diagram

CVSD CODEC Evaluation Kit 5 EV6090 Evaluation Kit 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective comp anies.

2 Preliminary Information

2.1 Laboratory Equipment

The following laboratory equipment must be user supplied to use this evaluation kit: Required

  • 2.7-5.0V regulated DC Power Supply Optional
  • 8Ω speaker or headphones. NOTE: A stereo jack is supported because it is popular and available. If a mono plug is connected it will mute the output signal by creating a short to ground. A mono loudspeaker may be connected but it must have a stereo plug.
  • Microphone
  • POTS (Plain Old Telephone System) telephone handset may be used to listen to CVSD encoded and decoded speech.

2.2 Handling Precautions

This evaluation kit is designed for use in office and laboratory environments. The following practices will help ensure its proper operation.

2.2.1 Static Protection

This product uses low power CMOS circuits which can be damaged by electrostatic discharge. Partially damaged circuits can function erroneously, leading to misleading results. Observe ESD precautions at all times when handling this product.

2.2.2 Contents - Unpacking

Please ensure that you have received all of the items on the separate information sheet (EK6090) and notify MX-COM within 7 working days if the delivery is incomplete.

3 Operation

3.1 Set-Up

THE EV6090 IS CONFIGURED WITH A CMX639 DIP DEVICE FOR OPERATION AT 2.7 to 5.0VDC. A 4-conductor modular jack (J2), sometimes referred to as an ‘RJ22 jack,’ has been provided to allow for quick speak/listen evaluation using a standard POTS handset. The following quick start will allow connection of a handset and power supply to quickly evaluate encoded and decoded CVSD audio. The user can select different sample clock rates and modes of operation to familiarize themselves with the operation of the CVSD device. EV6090 Power SupplyJ1J2 Figure 4: POTS Set-Up

3.1.1 Default Jumper Configuration

  • For single supply operation ensure shorting jumpers are installed at locations: E12, E6, E8, P4, and E5.
  • To use the on-board crystal ensure jumpers E1 and E2 are installed.
  • Ensure jumper E3 is set to position 1 and position 2, and jumper E4 is shorting position 2 to position 3 for audio routing to the handset.
  • Install E13 to route handset to summing amplifier.

CVSD CODEC Evaluation Kit 6 EV6090 Evaluation Kit 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective comp anies. 3.1.2 Connect external regulated power supply.

  • Adjust the supply for 5.0V
  • Connect the positive lead from the power supply to “VDDIN” (P3:2) and the negative lead to “GND” (P3:3).

3.1.3 Set Mode of Operation

To begin EV6090 operation, set switches S1-C1 (“CLKMODE1”) to OFF and S1-C2 (“CLKMODE2”) to ON to enable 32kbps sampling mode. Next, ensure that switch S1-C3 (“ALGORITHM”) is set to OFF to enable the 3-bit algorithm. Alternatively, change S1 switch position C1 and C2 as shown in Table 1 for other sample rates.

3.1.4 Quick Test

Connect handset and apply power. Adjust R6 clockwise to increase microphone audio level. Adjust R31 counterclockwise to increase audio level in the ear piece.

3.1.5 Further experimentation

Other modes of operation are available for test. Forced idle channel mode of either the encoder or decoder can be realized by changing dip switch settings. The use of Table 1, coupled with a review of the CMX639 data bulletin, will allow the user to exercise all operating modes.

3.2 Adjustments

R6 - adjust audio input level to the CODEC. R31 - adjust level for both the telephone hand set and speaker volume.

3.3 Operation

Jumpers E3 and E4 allow for different audio input and output routing. For testing with audio signals applied at the “AUDIO IN” jack, jumper E13 should be removed to avoid having undesired amplified signals injected into the encoder input. For testing with audio signals supplied by either the microphone input or the telephone handset, jumper E13 should be installed. Due to the high gain nature of this signal path, however, R6 doesn't need to be adjusted >0dB.

3.3.1 E3 Audio Input routing (to the CVSD encoder)

Jumper position 1 to 2 enables the following:

  • RCA Audio input - RC1
  • Mic Input – J3
  • Telephone Hand set input – J2 Jumper position 2 to 3 enables the following
  • Screw Terminal strip P2:1 input

3.3.2 E4 Audio output routing (from the CVSD decoder)

Jumper position 1 to 2 enables output audio to the following:

  • RCA Audio output – RC2
  • Screw Terminal strip P2:3 output Jumper position 2 to 3 enables output audio to the following:
  • Telephone Hand set output – J2
  • Speaker output J4

CVSD CODEC Evaluation Kit 7 EV6090 Evaluation Kit 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective comp anies.

3.3.3 S1 and S2 Switch Settings

Circuit Condition When Switch Is: Switch Name Description ON OFF S1-C1 CLKMODE1 Used in conjunction with CLKMODE2 to set sampling rate and source (internal or external). See table on EV6090 for switch combinations. S1-C2 CLKMODE2 Used in conjunction with CLKMODE1 to set sampling rate and source (internal or external). See table on EV6090 for switch combinations. S1-C3 ALGORITHM Determines whether 3-bit or 4-bit companding algorithm will be used. In general, 3-bit companding yields better results at rates of 32kbps and below, while 4-bit companding should be used at 48kbps and above. 4-bit algorithm 3-bit algorithm S1-C4 DATAEN This switch is used in combination with the /POWERSAVE switch to determine the state of the CMX639 encoder output. Encoder output is at high impedance regardless of state of /POWERSAVE switch. Encoder output is enabled if /POWERSAVE switch is OFF, and is set to V SS if it is ON. S2-C1 /ENCODERFORCEIDLE This switch causes a “perfect idle” pattern of 0101… to be present at encoder output. Encoder produces idle pattern at output. Encoder operates normally. S2-C2 DECIN This switch selects the source of the decoder input signal. Decoder input taken from PCMCIA interface. Decoder input taken from either DECIN screw terminal or encoder output. S2-C3 /DECODERFORCEIDLE This switch causes a 0101… pattern to be internally applied to the CMX639 decoder, resulting in the decoder output pin going to V DD/2. Decoder output is V DD/2. Decoder operates normally.

CVSD CODEC Evaluation Kit 8 EV6090 Evaluation Kit 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective comp anies. S2-C4 /POWERSAVE This switch is used in combination with the DATAEN switch to determine the state of the CMX639 encoder output. CMX639 is in powersave mode. CMX639 operates normally. Table 1: S1 and S2 Switch Settings CLK MODE 1 /Encoder Force Idle DEC IN /Powersave ALGORITHM DATA EN ON ON C1 C2 Sampling Clocks C1 External Clocks C1 64kbps C1 32kbps C1 16kbps S2 S1 Encoder Output State C1 Enabled C1 Vss C1 High Impedance High Impedance /Decoder Force Idle CLK MODE 2 Not Idle Idle Not Idle IdlePCMCIA Interface CMX639 or Screw Terminal Powersaved Not Powersaved 3-Bit 4-Bit CLK MODE 1 Enabled Figure 5: EV6090 Switch Settings

CVSD CODEC Evaluation Kit 9 EV6090 Evaluation Kit 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective comp anies.

4 Schematic Diagrams and PCB Layout

PCMCIA:C7 10UF C12 J1:24 E12 P3:4P3:2 P3:3P3:1 AGND PCV+ ENCIN GND 2200PF 1 2 RC2 P2:4P2:3P2:2P2:1 10KR9 AGND AGND AGND I/P_BIAS C15 .1UF C13 .1UF 3.9R1 AGND 1000UF C10 AGND DGND A/D_SHOR T DGND V+_IN 1000UF C32

100 Ohm

4.4mH S1:4 10KR5 V+ V-3 8 4 U2:A LM6482 AUDIO IN C5 .1UF 10KR3 10KR4 C6 .1UF 1 2 RC1 DGND S2:1 J1:2J1:3 J1:17P1:4J1:26 1KR17 P1:3 1KR28 E11 E10 1KR29 1KR10 10KR19 2200PF 10KR20 1KR11 C4 .1UF 1UF 100K 10KR8 SUMIN 10KR7 C14 1UF AGND C36 .1UF 1KR14 R4410K 74HC04 U3:B 74HC04 U3:C S2:2 68PF 33PF DATAEN N/C ENCIN BIAS N/C DECOUT XTAL ENCFORCEIDLE ALGORITHM CLKMODE2 DECIN ENCOUT N/C POWERSA VE DECFORCEIDLE XTAL ENCCLK DECCLK N/C VDD VSS CLKMODE1 CMX639 1KR13 10KR23 R2 1M BIAS 10KR25 AGND E7VDD 1UF C11 .1UF C37 J1:19J1:18 1KR12 10KR26 S1:1 S1:2 DGND PCMCIA:A0ENCOUTPCMCIA:C3 PCMCIA:C4 J1:1J1:20 J1:21P1:1 1KR16 J1:9P1:2 1KR18 S2:3 S1:3 DGND 1KR22 10KR39 R2110K PCV+ J1:33 J1:8 J1:28 J1:22P1:5 1.024MHz 10KR24 1KR15 R27 S2:4 AMPS DGND DGND DGND DGND DGND DGND DGND J1:25 U3:A 74HC04 U3:D 74HC04 U3:E 74HC04 U3:F 74HC04 J1:7J1:6J1:5J1:4 AGND C31 .1UF VDDV+ DGND 1000UF C33 AGND V+ IN VDD IN V- IN DECOUT GND AUDIO OUT AGND PCMCIA:B6 J1:15 PCMCIA:C0 PCMCIA:OUT DECCLK PCMCIA:A2PCMCIA:A1 ENCCLK C3 .1UF U2:B LM6482 TP1 PCMCIA:C1 PCMCIA:C2 PCMCIA:B0DECIN GNDPCMCIA:C5 PCMCIA:EXCLK-0 PCMCIA:A7 Figure 6: CVSD Control Section

CVSD CODEC Evaluation Kit 10 EV6090 Evaluation Kit 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective comp anies. AGND AGND C34 0.1UF 100K R37

10 Ohm

C22 0.1UF LM386 100UFC24 C1C2C3C4C5 SPEAKER C23 0.047UF AGND AGND AGND C35 1UF 4 123 TEL_JACK/4 TELEPHONEHANDSET MIC C1C2C3C4C5 AGND C21 10UF C27 0.1UF 100K R36 C17 100PF C16 .1UF 10KR35 470KR32 E13 NEW_BIAS 8 4 U4:A C18 .1UF 100K R31 7U4:B LM6482 100KR34 100KR33 C19 470PFV- AGND AGND NEW_BIAS V+_IN AMPS 8 4 U6:A C25 .1UF C26 .1UF C28 0.1UF 10KR41 NEW_BIAS AGND 10KR30 SUMIN 10K R40C30 .1UF C29 0.01UF C20 .1UF U6:B I/P_BIAS LM6482 LM6482 LM6482 Figure 7: Audio Amp Section

CVSD CODEC Evaluation Kit 11 EV6090 Evaluation Kit 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective comp anies. 1 C1 23 4 ON LM386 100K R36 0.047UF C23

10 OhmR38

0.1UF C22 C351UF 0.1UF C28 R31 100K 1 C1 2 3 4 ON E11 E13 RC1 RC2 R37100K C21 10UF .1UFC34 C25 .1UF R4010K 0.01UFC29 C30.1UF .1UFC26R4110K C20.1UF R3510KC18.1UF C17100PFR32470K R30 10K C27 .1UF .1UF .1UF R8 10K 2200PFC7 10KR5 R710K .1UFC3 2200PF 10K R9 .1UF C16 R33 100K .1UF 10K 10K R3 100K LM6482U4 E10 37 20 R12 R11 1K1K R13 R10 R181K 1K R17 C31 33PF R42 100 Ω 3.9 C33 1000UF E12 P3L1 R29 R22 1K1K R28 C32 1000UF C15 .1UF 1000UF C1010KR44 R141K R16 1K R151K R27 U374HC04 P1P4 10K R25 R24 10K R23 10K R39 10K R19 10K 1UFC9 33PF R21M 68PF 100KR34 C19470PF .1UF C36 C141UF C111UF .1UFC37 1.024MHz CMX639 10K R2010K R2110K R26 R43 C13 .1UF 10UF C12 SPEAKER MIC OUTPUT DRIVER SECTION AUDIO CONTROL SECTION GND DECOUT GND ENCIN ENCFORCEIDLE CLKMODE1 POWERSA VE DECFORCEIDLE DECIN TEL HNDSET RC2 AUDIO OUT AUDIO IN RC1 COMPUTER CONTROL SECTION POWER CONDITIONING SECTION 132 1 32 TP1 HALT EV6090 www.mxcom.com www.cmlmicro.co.uk www.cmlmicro.com.sg MX6X9 CIRCUIT SECTION CLKMODE1 OFF OFF ON ON CLKMODE2 OFF ON OFF ONLOCAL DIGITAL CONTROL SECTION GND DECCLK ENCCLK DECIN ENCOUT 16Kbit 32Kbit 64Kbit EXTERNAL 3bit 4bit V+INVDDINGNDV-IN 100 Ω CLKMODE2ALGORITHM DATAEN LM6482 LM6482 AUDIO IN ADJ AUDIO OUT/ VOL ADJ 3bit 4bit ALGORITHM OFF ON Figure 8: Evaluation Board Layout

5 Specifications

s Storage temperature -20 70 °C Operating temperature 10 35 °C Analog ground AGND J2:4, J3:C1, J4:C1, P2:2, P2:4, P3:3 0 0 0 V Analog positive supply voltage V+ IN P3:1 2.7 5.5 V Analog negative supply voltage V- IN P3:4 -5.5 0 V DUT & Digital supply voltage VDD IN P3:2 3.0 5.5 V Microphone input jack type MIC J3:C1, C5 mono or stere o Speaker output jack type SPEAKER J4:C1, C3, C5 stere o

In the process of creating a more global image, the three standard product semiconductor companies of CML Microsystems Plc (Consumer Microcircuits Limited (UK), MX-COM, Inc (USA) and CML Microcircuits (Singapore) Pte Ltd) have undergone name changes and, whilst maintaining their separate new names (CML Microcircuits (UK) Ltd, CML Microcircuits (USA) Inc and CML Microcircuits (Singapore) Pte Ltd), now operate under the single title CML Micro- circuits. These companies are all 100% owned operating companies of the CML Microsystems Plc Group and these changes are purely changes of name and do not change any underlying legal entities and hence will have no effect on any agreements or contacts currently in force. CML Microcircuits Product Prefix Codes Until the latter part of 1996, the differentiator between products manufactured and sold from MXCOM, Inc. and Consumer Microcircuits Limited were denoted by the prefixes MX and FX respectively. These products use the same silicon etc. and today still carry the same prefixes. In the latter part of 1996, both companies adopted the common prefix: CMX. This notification is relevant product information to which it is attached. Company contact information is as below: CML Microcircuits (UK)Ltd COMMUNICATION SEMICONDUCTORS CML Microcircuits COMMUNICATION SEMICONDUCTORS CML Microcircuits (Singapore)PteLtd COMMUNICATION SEMICONDUCTORS CML Microcircuits (USA) Inc. COMMUNICATION SEMICONDUCTORS Oval Park, Langford, Maldon, Essex, CM9 6WG, England Tel: +44 (0)1621 875500 Fax: +44 (0)1621 875600 uk.sales@cmlmicro.com www.cmlmicro.com

4800 Bethania Station Road,

Winston-Salem, NC 27105, USA Tel: +1 336 744 5050, 0800 638 5577 Fax: +1 336 744 5054 us.sales@cmlmicro.com www.cmlmicro.com No 2 Kallang Pudding Road, 09-05/

06 Mactech Industrial Building,

Tel: +65 7450426 Fax: +65 7452917 sg.sales@cmlmicro.com www.cmlmicro.com D/CML (D)/1 February 2002