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CML Microcircuits PE0403, Руководство пользователя

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CML Microcircuits PE0403 Скачать руководство пользователя страница 19

Evaluation Kit for CMX724x/CMX734x 

 

PE0403 

 

 

 2014 CML Microsystems Plc 

19 

um0403/1 

 

R34 and  R31 then replacing them with 50k Ohm potentiometers in positions VR2 and VR1 for the DISC 
and ALT input paths respectively. Bourns type 3386P or similar will fit the footprints provided. 
 

6.1.6.  Audio Interfaces 

All  Audio  Interface  connectors  can  be  configured  to  support  different  types  of  signal  connections  and  a 
variety  of  external  equipment  such  as  SoundBlaster

TM

  compatible  headsets  and  PC-based  soundcards. 

The  Mic  input  connector  has  an  optional  ground  connection  to  avoid  ground  loops  via  external 
connections. 

The  Mic/Line  In interface is a 3.5mm jack socket J21 connected to the  CMX7240/CMX7340 Microphone 
inputs, via a configurable jumper field J15. See Figure 5 for details of single ended input configuration. 

The J21 input can be configured for use as a line or mic input, JP6 selects what type of input is supported; 
short for a mic input or open circuit for a line input. 

DC  bias  is  provided  for  an  electret microphone.  This  can  be  selected  as  3.3V  (fit  J12:  1-2)  or  VIN_FILT 
(the external supply to the board - fit J12: 2-3), or disabled (remove jumpers from J12). 

Signal  level  and  gain  settings  should  be  selected  to  ensure  the  signal  level  at  all  stages  in  the  signal 
processing chain is kept within the recommended limits. 

1

2

11

12

J15

Single-ended.

Signal on Ring.

1

2

11

12

J15

Single-ended.
Signal on Tip.

 

Figure 5  Audio Input Jumper Settings 

 
To DC couple the MIC input short pins 12 and 11 of J15. 
 
The  Line  Out  interface  is  a  3.5mm  jack  socket J1  connected  to the  CMX7240/CMX7340

’s audio output. 

The output is connected to the tip of J1. If JP4 is fitted, the signal is also connected to the ring. The sleeve 
of J1 is connected to the analogue ground of the PCB. 
 

6.1.7.  Digital Interfacing 

Connector J6 provides access to four general purpose I/O lines, the two sysclk outputs and a synchronous 
serial port. 
 
Use  of  these  signals  is  Function Image

TM

  dependent.  In  some  cases  they  will  have  no  function.  See 

relevant Function Image

TM

 documentation. 

 
Connector  J20  is  configured  as  a  C-BUS  master  and  compatible  with  CML  evaluation  kits  with  C-BUS 
slave connectors. Use of this feature is also Function Image

TM

 dependent. 

 
 

6.2. 

Adjustments and Controls 

The  boot  state  of  the  CMX7240/CMX7340  device  can  be  set  manually,  using  jumpers  on  header,  J2. 
When used with the PE0002, these jumpers should be left open circuit. 
 

Содержание PE0403

Страница 1: ...quires an additional 5 volt supply o 50 Output signal drivers o Instrumentation interface to CMX7240 single ended input signals PE0403 724x only o Instrumentation interface to CMX7340 differential inp...

Страница 2: ...y regulation facilities for operation from a single 5 volt supply or a dual 5 volt supply if the instrumentation interface is required The board is fitted with a C BUS connector allowing the PE0403 to...

Страница 3: ...18 6 1 4 Baseband Interfacing 18 6 1 5 Instrumentation Interface 18 6 1 6 Audio Interfaces 19 6 1 7 Digital Interfacing 19 6 2 Adjustments and Controls 19 6 3 Function Image TM 20 6 3 1 Load Function...

Страница 4: ...Register Settings External Digital Clocks 24 Figure Page Figure 1 Block Diagram 5 Figure 2 PE0403 used with PE0002 7 Figure 3 PCB Layout Top 15 Figure 4 PCB Layout Bottom 16 Figure 5 Audio Input Jumpe...

Страница 5: ...c 5 um0403 1 CMX7240 CMX7340 V J18 3V3D 4V0 J19 V Clocks 19 2MHz default SSP GPIO J6 C BUS Master J20 Instrumentation Interface DISC ALT_IN MOD1 2_OUT Supplies 4V0 V Auxiliary ADC DAC J8 C BUS Boot Co...

Страница 6: ...ication ES000243 exe or later version installed on the PC 2 2 Handling Precautions Like most evaluation kits this product is designed for use in office and laboratory environments The following practi...

Страница 7: ...1 Setting Up Refer to the PE0002 user manual and follow the instructions given in the quick start section Ensure the jumpers on J2 are open circuit The CMX7240 CMX7340 BOOTEN1 and BOOTEN2 pins are dr...

Страница 8: ...40 CMX7340 BOOTEN1 and BOOTEN2 pins may be set using jumpers on header J2 Consult the relevant CMX734x documentation for valid modes A jumper in circuit on header J2 corresponds to a 0 state on the bo...

Страница 9: ...I O pin 7 GPIOA BI General purpose I O pin 8 GPIOB BI General purpose I O pin 11 SYSCLK2 O P CMX7240 CMX7340 system clock 2 output 12 SYSCLK1 O P CMX7240 CMX7340 system clock 1 output 13 MOSI O P SSP...

Страница 10: ...P Auxiliary ADC input 6 AUXDAC3 O P Auxiliary DAC output 7 AUXADC1 I P Auxiliary ADC input 8 AUXDAC4 O P Auxiliary DAC output 9 10 GNDA PWR Analogue supply ground J9 1 IP1P O P Channel 1 DISC input p...

Страница 11: ...ly 5 volt J20 1 3 5 7 9 10 and 13 to 20 N C Do not make any connection to these pins 2 SSOUT BI C BUS master chip select FI dependent 4 MOSI BI C BUS master command data FI dependent 6 CLK BI C BUS ma...

Страница 12: ...oop GNDD digital ground TP10 0V Loop GNDA analogue ground TP11 0V Loop GNDA analogue ground TP12 Pad Output from on board regulator not fitted Optional external DC supply voltage for CMX7240 CMX7340 c...

Страница 13: ...d by customer 5 6 Short 19 2MHz oscillator clock source 7 8 Open External clock source 9 10 Short Ground external clock input J9 1 2 Short Isolates channel 1 DISC input ve from instrumentation interfa...

Страница 14: ...Evaluation Kit for CMX724x CMX734x PE0403 2014 CML Microsystems Plc 14 um0403 1 Table 4 LEDs LEDs LED Ref Description D1 Indicates that the digital supply voltage is present...

Страница 15: ...4x PE0403 2014 CML Microsystems Plc 15 um0403 1 5 Circuit Schematics and Board Layouts For clarity circuit schematics are available as separate high resolution files These can be obtained via the CML...

Страница 16: ...Evaluation Kit for CMX724x CMX734x PE0403 2014 CML Microsystems Plc 16 um0403 1 Figure 4 PCB Layout Bottom...

Страница 17: ...r J19 if required Each supply has a test point where it can be monitored see Table 2 Test Points U13 is supplied as an empty footprint for a LP2985IM5 1 8 volt regulator this can be fitted to supply a...

Страница 18: ...nd MOD2 outputs can be accessed by using J14 and J17 respectively Both MOD outputs have the option of using 50 Ohm drivers this can be configured with J13 and J16 for MOD1 and MOD2 respectively To con...

Страница 19: ...he board fit J12 2 3 or disabled remove jumpers from J12 Signal level and gain settings should be selected to ensure the signal level at all stages in the signal processing chain is kept within the re...

Страница 20: ...tions 6 3 1 6 3 2 and 6 3 3 6 3 1 Load Function Image TM via C BUS Use the Function Image Load tab Select Function Image Source C BUS Enter the name of the file containing the Function Image or naviga...

Страница 21: ...724x CMX734x PE0403 2014 CML Microsystems Plc 21 um0403 1 6 3 2 Load Function Image TM from Serial Memory Device Note This option is not supported on PE0403 Figure 7 Function Image Load Tab from Seria...

Страница 22: ...C BUS interface These registers can be programmed using the C BUS Control tab in the PE0002 software 6 4 1 Write to and Read from a Register Write any 16 bit number to register C0 The data transferred...

Страница 23: ...ld be nominally 6 4dB above the level of the input signal 6 4 3 Check Analogue Path and Set Output Gain Configure the CMX7240 CMX7340 with the C BUS register data given in Table 7 Table 7 CMX7240 CMX7...

Страница 24: ...observed at the system clock 1 output TP4 and a frequency of 16 384MHz should be observed at the system clock 2 output TP3 Now write 0xC0C8 to either AC or AE registers to turn off the system clock 1...

Страница 25: ...mage to the evaluation kit Min Max Units Supply V 0V 0 3 9 0 V Supply V 0V 0 3 9 0 V Voltage on any connector pin to VSS 0 3 3 6 V Current into or out of V and VSS pins 0 0 45 A Current into or out of...

Страница 26: ...5 3 3 3 45 V 4V0 3 82 4 0 4 18 V 4V0 3 82 4 0 4 18 V Analogue Parameters Output Impedances MOD1 MOD2 4 51 AUDIO 4 0 1 Input Impedances DISC ALT 4 51 MIC 4 100 k External Clock Input 3 High pulse width...

Страница 27: ...tsoever for any contamination which results from using this product and the onus for checking that the software firmware is virus free is placed on the purchaser of this evaluation kit or development...

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