CML Microcircuits PE0403 Скачать руководство пользователя страница 17 | Manualshive

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CML Microcircuits PE0403 Скачать руководство пользователя страница 17

Evaluation Kit for CMX724x/CMX734x

PE0403



2014 CML Microsystems Plc

17

um0403/1

6.

Detailed Description

6.1.

Hardware Description

The PE0403 as shipped may not have the optimum configuration or component values for all function
images. Check the PE0403 schematic against recommendations in the specific CMX734x datasheet.

6.1.1. Power Supplies

The board is fitted with four voltage regulators and has a footprint for a fifth regulator.

U12 and U14 provide the digital and analogue supply rails respectively. The input to these two regulators
should  be  provided  by  an  external  5V  dc  regulated  power  supply,  which  can  be  daisy  chained  from  the
PE0002  or  connected  to  the  board  via  connector  J19,  a  push  type  connector.  LED  illumination  confirms
the on-board presence of the +3.3V dc digital voltage supply.

U15  and  U16  provides  the  +/-4V  required  for  the  instrumentation  interface,  the  input  to  these  regulators
should be provided by an ex/-5V dc regulated power supply connected to the board via connector
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  an
external voltage to the CMX7240/CMX7340

’s VDEC pin. To do this JP1 will need to be fitted, footprints are

also supplied for the regulator

’s supporting components, C55 and C56, where C55 = 10nF and C56 =

10µF. Note: The CMX7240/CMX7340 internal regulator must then be reduced to minimum voltage (1.4V)
by writing $77 to C-BUS register $BF.

6.1.2. Clock Options

The PCB is designed to provide three CMX7240/CMX7340 device clock options. The board is supplied
with a 19.2MHz oscillator module fitted. This option allows convenient RF synthesiser configuration for
typical channel spacings.

Other options are an external clock source at J4 or a 6.144MHz quartz crystal oscillator circuit (C18, C19
and X1).

Header J5 is used with jumper sockets to select the required option as shown in the table below. Shaded
cells illustrate locations where a jumper socket should be fitted.

Table 5 Clock Select Jumper Positions

J5
Jumper
Position

Clock Option

19.2MHz oscillator
(default)

External

Quartz crystal

1-2

3-4

5-6

7-8

9-10

«
...
15
16
17
18
19
...
»

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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