CML Microcircuits PE0403 User manual

CMLMicrocircuits
COMMUNICATIONSEMICONDUCTORS
PE0403
Evaluation Kit
User Manual

2014 CML Microsystems Plc
um0403/1 July 2014 Provisional Issue
Features
PE0403 - 724x for CMX724x family FirmASIC®
product range evaluation; fitted with CMX7240
to emulate CMX724x device performance
PE0403 - 734x for CMX734x family FirmASIC®
product range evaluation; fitted with CMX7340
to emulate CMX734x device performance
Instrumentation interface
(requires an additional –5 volt supply):
o50Output signal drivers
oInstrumentation interface to CMX7240 single-
ended input signals (PE0403 - 724x only)
oInstrumentation interface to CMX7340
differential input signals (PE0403 - 734x only)
On-board supply regulators operate from a
single 5 volt supply
19.2MHz oscillator or external clock input
to the on-board reference device
Command and control by PC via the
PE0002 Interface Card or via the user’s
microcontroller emulator or development
application
On-board access to all CMX7240/CMX7340
signals, commands and data
C-BUS Master for CMX7240/CMX7340
control of other CML Evaluation Kits

Evaluation Kit for CMX724x/CMX734x PE0403

2014 CML Microsystems Plc 2 um0403/1
1. Brief Description
The PE0403 Platform Evaluation Kit is designed to assist in the evaluation and application development of
the CMX724x and CMX734x ranges of FirmASIC®products. The kit is in the form of a populated PCB
comprising a generic CMX7240 or CMX7340 IC and the appropriate supporting components and circuitry.
ThePE0403 - 724x is fitted with a CMX7240 and the PE0403 - 734x is fitted with a CMX7340.
The board also incorporates all of the necessary power-supply 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 be operated by connection to either of
the two C-BUS ports on a CML PE0002 Interface Card, and used with the associated PC GUI software, or
by direct connection between the CMX7240/CMX7340 C-BUS and the user's µC development application
or emulation system.
The common CMX724x/CMX734x Function ImageTM (FI) can be loaded, on power-up, directly into the on-
board target IC (CMX7240/CMX7340) using the PE0002 interface or the user's system.
Function images suitable for the CMX724x/CMX734x range of products can be downloaded from the CML
Technical Portal.

Evaluation Kit for CMX724x/CMX734x PE0403
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2014 CML Microsystems Plc 3 um0403/1
CONTENTS
Section Page
1. Brief Description ..................................................................................................2
2. Preliminary Information.......................................................................................6
2.1. Laboratory Equipment .....................................................................................6
2.2. Handling Precautions.......................................................................................6
2.2.1. Static Protection........................................................................................6
2.2.2. Contents - Unpacking................................................................................6
2.3. Approvals.........................................................................................................6
3. Quick Start............................................................................................................7
3.1. With PE0002....................................................................................................7
3.1.1. Setting-Up .................................................................................................7
3.1.2. Operation ..................................................................................................7
3.2. Without PE0002...............................................................................................8
4. Signal Lists...........................................................................................................9
5. Circuit Schematics and Board Layouts ...........................................................15
6. Detailed Description ..........................................................................................17
6.1. Hardware Description....................................................................................17
6.1.1. Power Supplies .......................................................................................17
6.1.2. Clock Options..........................................................................................17
6.1.3. Control Interface......................................................................................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 ImageTM...........................................................................................20
6.3.1. Load Function ImageTM via C-BUS.........................................................20
6.3.2. Load Function ImageTM from Serial Memory Device ..............................21
6.3.3. Program Serial Memory..........................................................................22
6.4. Evaluation Tests............................................................................................22
6.4.1. Write to and Read from a Register .........................................................22
6.4.2. Check Analogue Path and Set Input Gain ..............................................23
6.4.3. Check Analogue Path and Set Output Gain............................................23
6.4.4. Generate Two External Digital Clocks ....................................................24
6.5. Troubleshooting.............................................................................................24
7. Performance Specification................................................................................25
7.1. Electrical Performance ..................................................................................25
7.1.1. Absolute Maximum Ratings ....................................................................25
7.1.2. Operating Limits......................................................................................25
7.1.3. Operating Characteristics........................................................................26
7.1.4. Operating Characteristics –Timing Diagrams........................................26

Evaluation Kit for CMX724x/CMX734x PE0403
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2014 CML Microsystems Plc 4 um0403/1
Table Page
Table 1 Signal List..............................................................................................................9
Table 2 Test Points ..........................................................................................................12
Table 3 Jumpers ..............................................................................................................13
Table 4 LEDs....................................................................................................................14
Table 5 Clock Select Jumper Positions............................................................................17
Table 6 CMX7240/CMX7340 Register Settings –Analogue Path and Input Gain...........23
Table 7 CMX7240/CMX7340 Register Settings –Analogue Path and Output Gain........23
Table 8 CMX7240/CMX7340 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 Jumper Settings..............................................................................19
Figure 6 Function Image™Load Tab –via C-BUS..........................................................20
Figure 7 Function Image™Load Tab –from Serial Memory (not supported) .................21
Figure 8 Program Serial Memory Tab (not supported) ....................................................22
It is always recommended that you check for the latest product datasheet version from the Datasheets
page of the CML website: [www.cmlmicro.com].
History
Version
Changes
Date
1
Initial release
1st July 2014

Evaluation Kit for CMX724x/CMX734x PE0403

2014 CML Microsystems Plc 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
Control,J7
+3V3A
Audio
Output,
J1
Mic
Input,
J21
Figure 1 Block Diagram

Evaluation Kit for CMX724x/CMX734x PE0403
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2014 CML Microsystems Plc 6 um0403/1
2. Preliminary Information
2.1. Laboratory Equipment
The following laboratory equipment is needed to use this evaluation kit:
A 5 volt dc regulated power supply (or +/- 5 volt supply when using the instrumentation interface).
If the PE0403 is being used with the PE0002 Interface Card, the following items will also be required:
An IBM compatible PC with the following requirements:
One of the following Windows operating systems installed: 2000sp4, XPsp2, Vista or Win7
USB port
Minimum screen resolution 800 x 600. Recommended resolution 1024 x 768.
A USB type A male to mini B male cable.
Software application 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 practices will help ensure its proper operation.
2.2.1. Static Protection
This product uses low-power CMOS circuits that 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 (EK0403) and
notify CML within seven working days if the delivery is incomplete.
2.3. Approvals
This product is not approved to any EMC or other regulatory standard. Users are advised to
observe local statutory requirements, which may apply to this product.

Evaluation Kit for CMX724x/CMX734x PE0403

2014 CML Microsystems Plc 7 um0403/1
3. Quick Start
This section is divided into two sub-sections. The first is for those users who are using the PE0403 with a
PE0002 controller card and its Windows PC GUI software. The second is for users who are using the
PE0403 by itself, without a PE0002.
3.1. With PE0002
Note that the C-BUS connector, J7, and the power connector J18 are both right angle headers and are
designed to plug directly into sockets J5 (C-BUS 1 port) and J9 respectively, or sockets J3 (C-BUS 2 port)
and J7 respectively, of a PE0002.
3.1.1. 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 driven from
the PE0002.
The basic arrangement, when used with the PE0002, is shown below:
PE0002
PC
USB Cable
PE0403
J18
J2
J3 or J5
C-BUS
Direct Connections
J2
J8
J9 or J7
+V
J7
Power
Supply
Figure 2 PE0403 used with PE0002
3.1.2. Operation
The Function ImageTM (FI) must now be loaded into the CMX7240/CMX7340 device. A FI is provided as a
‘C’ type header file and must be obtained from the CML Project Resource Portal. This can be loaded
directly from a file on the PE0002 host PC to the CMX7240/CMX7340.
The PE0403 should now be ready for evaluation of the CMX7240/CMX7340 with the chosen FI.

Evaluation Kit for CMX724x/CMX734x PE0403
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2014 CML Microsystems Plc 8 um0403/1
3.2. Without PE0002
As an alternative to using the PE0002 controller kit, users may control the CMX7240/CMX7340 target
device with a user-supplied host controller card. The C-BUS connections are made via connector J7.
The power-up, or boot state of the CMX7240/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 boot pins. Alternatively the state of these pins may be set
via the connector, J7, pins 13 and 14. By default, 47kΩ pullup resistors on the PE0403 board provide a ‘1’
state on each of the two BOOTEN pins.
A FI for the CMX7240/CMX7340 device must be included in the customer’s host system and loaded into
the CMX7240/CMX7340 device on power-up.

Evaluation Kit for CMX724x/CMX734x PE0403
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2014 CML Microsystems Plc 9 um0403/1
4. Signal Lists
Table 1 Signal List
CONNECTOR PINOUT
Connector
Ref.
Connector
Pin No.
Signal
Name
Signal
Type
Description
J1
TIP
SPKR
O/P
AUDIO
RING
-
(O/P)
(dependent on the setting of JP4, see 6.1.6)
SLEEVE
GNDA
PWR
Analogue ground.
J4
-
CLK EXT
I/P
External input option for CMX7240/CMX7340
clock.
J6
1,4,5,6,
9,10,18
-
N/C
Do not make any connection to these pins
2
GPIO1
BI
General purpose I/O pin.
3
GPIO2
BI
General purpose 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 Master output, slave input.
14
SSOUT/
FSO
BI
SSP Frame sync.
15
MISO
I/P
SSP Master input, slave output.
16
EPSCSN
O/P
EEPROM Chip Select
17
SSPCLK
BI
SSP Clock.
19, 20
GNDD
PWR
Digital supply ground.
J7
3, 5, 7, 9,
15 to 20
-
N/C
Do not make any connection to these pins
1
RESET
I/P
CMX7240/CMX7340 Hardware Reset Pin
2
CSN
I/P
Chip select. Connects to host C.
4
CDATA
I/P
Serial Data input. Connects to host C.
6
SCLK
I/P
Serial clock input. Connects to host C.
8
RDATA
O/P
Serial data output. Connects to host C.

Evaluation Kit for CMX724x/CMX734x PE0403
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2014 CML Microsystems Plc 10 um0403/1
CONNECTOR PINOUT
Connector
Ref.
Connector
Pin No.
Signal
Name
Signal
Type
Description
10
IRQN
O/P
Interrupt request. Connects to host C.
11, 12
GNDD
PWR
Digital supply ground.
J7
13
BOOTEN1
I/P
CMX7240/CMX7340 Hardware Boot Control.
14
BOOTEN2
I/P
CMX7240/CMX7340 Hardware Boot Control.
J8
1
AUXADC4
I/P
Auxiliary ADC input.
2
AUXDAC1
O/P
Auxiliary DAC output.
3
AUXADC3
I/P
Auxiliary ADC input.
4
AUXDAC2
O/P
Auxiliary DAC output.
5
AUXADC2
I/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 positive, instrumentation
output.
2 #
I/P
Channel 1(DISC) input positive.
3
}IP1N
O/P
Channel 1(DISC) input negative, instrumentation
output.
4
I/P
Channel 1(DISC) input negative.
5, 6
GNDA
PWR
Analogue ground.
7
}IP2N
O/P
Channel 2(ALT) input negative, instrumentation
output.
8
I/P
Channel 2(ALT) input negative.
9 #
}IP2P
O/P
Channel 2(ALT) input positive, instrumentation
output.
10 #
I/P
Channel 2(ALT) input positive.
J10
1
ALT
I/P
Channel 2(ALT) instrument input, single ended.
J11
1
DISC
I/P
Channel 1(DISC) instrument input, single ended.

Evaluation Kit for CMX724x/CMX734x PE0403
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2014 CML Microsystems Plc 11 um0403/1
CONNECTOR PINOUT
Connector
Ref.
Connector
Pin No.
Signal
Name
Signal
Type
Description
J14
1
MOD1
O/P
MOD1 output
J17
1
MOD2
O/P
MOD2 output.
J18
1, 2
GNDD
PWR
Digital supply ground.
3 to 6
+V
PWR
External supply voltage –Daisy chained from
PE0002.
J19
3
+V
PWR
External supply voltage, nominally +5 volt.
2
0V
PWR
External supply ground.
1
-V
PWR
Optional external negative supply voltage,
nominally -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 master, serial clock, FI dependent.
8
MISO
BI
C-BUS master, reply data, FI dependent.
11, 12
GNDD
PWR
Digital ground.
J21
TIP
T
I/P
Optional Mic In (tip) –see 6.1.6 and J15
RING
R
I/P
Optional Mic In (ring) –see 6.1.6 and J15
SLEEVE
G
PWR
Analogue ground.(if J15 pin 9-7 shorted)
Notes: BI = Bidirectional
HiZ = High impedance
I/P = Input
N/C = Not connected
O/P = Output
PWR = Power supply connection
For PE0403 - 724x boards, connector J9: pins 1, 2, 9 and 10 are N/C. Do not connect to these pins.

Evaluation Kit for CMX724x/CMX734x PE0403
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2014 CML Microsystems Plc 12 um0403/1
Table 2 Test Points
TEST POINTS
Test Point
Ref.
Default
Measurement
Description
TP2
HiZ
Loop –Non-buffered Audio output
TP3
0V
Loop –CMX7240/CMX7340 system clock 2 output.
TP4
19.2MHz
Loop –CMX7240/CMX7340 system clock 1 output.
TP5
+1.65V
Pad –CMX7240/CMX7340 VBIAS.
TP6
+3.3V
Pad –DVDD, digital supply.
TP7
+5V
Pad –External supply voltage.
TP8
0V
Loop –GNDD, digital ground.
TP9
0V
Loop –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 core.
TP13
-5V
Pad –Optional external negative supply voltage, nominally -5 volt.
TP14
+3.3V
Pad –AVDD, analogue supply.
TP15
+4.0V
Pad –Output from on-board regulator. Positive supply voltage for
instrumentation interface, +4.0V –if required.
TP16
-4.0V
Pad –Output from on-board regulator. Negative supply voltage for
instrumentation interface, -4.0V –if required.
TP18
HiZ
Loop –MOD1 - Channel 1 output.
TP19
HiZ
Loop –MOD2 - Channel 2 output.
TP20
0V
Loop –GNDA, analogue ground.

Evaluation Kit for CMX724x/CMX734x PE0403
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2014 CML Microsystems Plc 13 um0403/1
Table 3 Jumpers
JUMPERS
Link
Ref.
Positions
Default
Position
Description
JP2
1-2
Short
Isolates digital supply rail from CMX7240/CMX7340.
JP3
1-2
Short
Isolates analogue supply rail from CMX7240/CMX7340.
JP4
1-2
Open
Connects Audio(J1) connector Ring to Tip.
JP6
1-2
Short
Select Mic or Line level for Mic input (Short for Mic level)
J2
1-2
Open
Manual BootEn1 control (short = LO).
3-4
Open
Manual BootEn2 control (short = LO).
J5
1-2
Open
Crystal clock source –if components fitted by customer.
3-4
Open
Crystal clock source –if components fitted 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
interface.
3-4
Short
Isolates channel 1(DISC) input -ve from instrumentation
interface.
7-8
Short
Isolates channel 2(ALT) input -ve from instrumentation
interface.
9-10
Short
Isolates channel 2(ALT) input +ve from instrumentation
interface.
J13
1-2/2-3
1-2
Connect the 50 Ohm driver to J14 if (1-2), or bypass the
50 Ohm driver if (2-3)
J12
1-2/2-3
Open
Set Mic bias level, 1-2 for 3V3, 2-3 for +V input, or open for
bias disabled. See 6.1.6.
J15
3-4,5-6,7-9
-
See 6.1.6 Audio Interfaces.
11-12
Open
Select coupling on Mic input. Short to DC couple.
J16
1-2
1-2/2-3
Connect the 50 Ohm driver to J17 if (1-2) or bypass the
50 Ohm driver if (2-3)

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

Evaluation Kit for CMX724x/CMX734x PE0403
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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 website.
Figure 3 PCB Layout: Top

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

Evaluation Kit for CMX724x/CMX734x PE0403
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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 external +/-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

Evaluation Kit for CMX724x/CMX734x PE0403
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2014 CML Microsystems Plc 18 um0403/1
6.1.3. Control Interface
The C-BUS and CMX7240/CMX7340 boot control signals are brought out on connector J7. This is a right
angle male header designed to plug directly into the PE0002 interface card that has a matching female
header.
Alternatively, if not using the PE0002, the CMX7240/CMX7340 boot control signals can be manually set
with jumpers on header J2.
6.1.4. Baseband Interfacing
The availability and usage of these signals are Function ImageTM dependent.
PE0403-724x only:
The CMX7240 single ended inputs are fed through a RC network. Specific requirements for this network
are FI dependent. Single-ended signals can be input to the RC networks at header, J9, but must be biased
around AVDD/2.
PE0403-734x only:
The CMX7340 differential inputs are fed through a RC network. Specific requirements for this network are
FI dependent. Differential signals can be input to the RC networks at header, J9. The ‘P’ and ‘N’ signals
should each be biased, nominally, around AVDD/2 for maximum use of the available dynamic range. CML
evaluation kits for RF receiver products have matching headers, but the signal polarity must be observed.
Alternatively, check Function Image™documentation for the possibility of a programmable signal
inversion.
The MIC input and Audio output connections can be made via 3.5mm jack sockets, see section 6.1.6.
The MOD1 and 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 configure the outputs, short pin 2 and pin 1 to use the 50 Ohm driver, or short pin 2 and
pin 3 to bypass the driver. Use of this section of the PE0403 requires an additional negative supply rail,
nominally –5 volts.
For example: to use the 50 Ohm driver with the MOD1 output connect J13 pin 1 to pin 2.
Connector J8 provides access to Auxiliary ADCs 1 to 4 and Auxiliary DACs 1 to 4 of the
CMX7240/CMX7340 reference device.
6.1.5. Instrumentation Interface
An instrumentation interface has been provided to enable connection of the signal inputs to laboratory
equipment that has only single-ended connections. Use of this section of the PE0403 requires an
additional negative supply rail, nominally –5 volts.
PE0403-724x only:
The input path has a gain of 0dB.
The input path is configured to give a signal biased around AVDD/2 at the input to the CMX7240,
assuming that the input signal is biased around GNDA. This can be made adjustable by removing resistors
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.
PE0403-734x only:
The input path has an effective gain of 6dB.
The input path is configured for, nominally, 0 volts offset in the differential signal input to the CMX7340,
assuming that the input signal is biased around GNDA. This can be made adjustable by removing resistors

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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 SoundBlasterTM 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 ImageTM dependent. In some cases they will have no function. See
relevant Function ImageTM 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 ImageTM 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.

Evaluation Kit for CMX724x/CMX734x PE0403

2014 CML Microsystems Plc 20 um0403/1
6.3. Function ImageTM
There are two methods by which a FI may be loaded into the CMX7240/CMX7340 device.
Whenever power is removed from the PE0403 the FI data will be erased from the CMX7240/CMX7340
device. Therefore, whenever power is applied a FI must be loaded via the C-BUS interface.
If the PE0403 is used with the PE0002 PC interface, Function Images can be loaded as described in
sections 6.3.1, 6.3.2 and 6.3.3.
6.3.1. Load Function ImageTM 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 navigate to the required file using the
‘Browse’ button.
Enter the activation code in the lower edit box. Alternatively select one of two previously used codes in
the drop down list.
Select Target Board.
Click the “Load” button. The progress of the download is shown visually on the progress bar and when
the download has completed a message box will be displayed indicating if the result of the download
operation was successful or not.
Figure 6 Function Image™Load Tab –via C-BUS