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Table of Contents

1        Introduction        1

1.1        Hardware Features        2

1.1.1        Connectors        2

2        Usage        3

2.1        Connecting External Signals        3

2.1.1        Input Signal Adaptation        3

2.1.2        Power Measurement        3

2.1.3        Power Probe        4

2.2        Initial Configuration        8

2.2.1        Inputs        9

2.2.2        Outputs        9

2.3        Monitoring Inputs and Manipulating Outputs        10

2.3.1        Manipulation Dialog        10

2.3.2        HIL Monitor Plugin        11

2.3.3        Watch Window and Evaluation Expressions        12

2.3.4        Trace        12

2.3.5        Profiler        14

2.3.6        testIDEA        15

2.3.7        isystem.connect access        16


The I/O Module is an optional add-on to the iC5500 and iC6000 emulator.

It provides the capability to measure digital and analog signals as well as drive them.

Input signals can be read out asynchronously from winIDEA IDE or by external applications and scripts using the isystem.connect interface. A real-time capture, alongside the on-chip trace or standalone, is also possible.

Output signals can likewise be driven from the IDE or via isystem.connect. Beside simple assertion of an output, one or more outputs can be driven by a state machine based waveform generator, which can be triggered by input signals.

testIDEA uses isystem.connect interface to assert outputs prior to the test and verify inputs after the test.

Ordering code:  IC60011

1.1Hardware Features



System Port: Trace trigger output, 100ohm series termination


Digital inputs: 10kOhm input impedance, 5V tolerant, ESD protected


Digital outputs: 100ohm output series termination, ESD protected


Analog inputs: 8-bit ADCs, 6.25MSPS, 1MOhm input impedance, range is ±5.0V with 1:1 probe, ±50V with a 10:1 probe, 3ns acquisition time.
Power measurement probe uses these two inputs for power measurement.


Analog outputs: 8-bit DACs, ±4.5V bipolar output, ±7mA drive, 100ohm output resistance


Current Sense Port: For power measurement via Power Probe


All digital signals are 3.3V LVTTL compatible and are ESD protected.

All analog signals have a Schottky diode over- / undervoltage protection, except the Current Sense signals.

The maximum voltage on the Current Sense probe is 60V.

Nominal sampling rate of all inputs and outputs is 12.5MSps.


Connector Pinout

10-pin header for the System Port.

16-pin header for 8 digital inputs.

16-pin header for 8 digital outputs.

10-pin header for 2 analog outputs.

2 BNC connectors for 2 analog inputs.

10-pin header for Power Measurement Port

All connectors, except the BNCs, are standard Berg 2.54mm / 100mils raster.

For analog inputs, standard scope probes can be used.


2.1Connecting External Signals

2.1.1Input Signal Adaptation

When connecting to external signals please make sure not to exceed the specified input and output range of the IOM signal interface. If the digital input source voltage is higher than 5V, please condition the signal source with a suitable resistor divider, or a resistor-Zener diode limiter.

In case, for example, a 24V source is connected directly to a module digital input, an excess input current of about 18mA will flow through an input 1K resistor and a diode in the ESD protection device to the module internal 5V power supply.

Although this may not sound catastrophic, it must be avoided. Any long-term exposure will lead to a degradation of the module electronics due to electromigration. 

On the other hand, if an analog input signal amplitude is smaller than the module input analog range, it is recommended to add a suitable amplifier to make use of the full A/D converter resolution.

2.1.2Power Measurement

When the IOM is switched to Power Measurement mode (Hardware/Options/ IO dialog, Use AIN0/AIN1 for Power Measurement), the AIN0 is used for voltage measurement and AIN1 for current measurement.

For voltage measurement

Connect AIN0 input to the target voltage at the RS-. That’s the low side of the target shunt resistor.

If the voltage is higher than 5V, use a suitable resistor divider. Enter the divider ratio as a Voltage/Multiply factor in the configuration dialog.

For current measurement

Disconnect the AIN1 from other sources

Use the Current Sense connector to connect the RS+ and RS- pins to a high side and a low side of the target shunt resistor, respectively.

Specify the resistance of the RS shunt resistor in the configuration dialog.

This schematic depicts correct power measurement setup.

Note: The full-scale shunt voltage range is 250mV. So, for example, a 1Ω shunt resistor gives a current range of 250mA.

Full-scale Shunt Voltage

Shunt Resistance

Full-scale Current Range

Shunt Power Dissipation


1.00 Ω




0.25 Ω




0.10 Ω



2.1.3Power Probe

The PowerProbe is an optional power interface board. It is to be connected between a target power supply and a target board itself. Additional connections are to be made for the IOM current and voltage probes., Jumpers and a Switch

P1 and P2        

Target power supply inputs. Use one or the other. Maximum voltage is 20V.


10-pin Berg connector to connect the IOM Current Probe.

P4 and P5        

Power supply output towards the target.


BNC connector for the IOM Voltage Probe. To be connected to the AIN0 analog input.


Jumper block for selecting different shunt resistors.

1) Excessive current will burn the resistors.  
2) Never set more than one jumper position at a time.
3) Selected shunt resistors must handle the heat generated by the power dissipated on them.

Three of the five available positions are populated with resistors:


Shunt Resistance

Shunt Resistance
including JB1


1.00 Ω

1.00 Ω


0.25 Ω

0.26 Ω


0.10 Ω

0.11 Ω

The remaining two positions are available for a custom user setup with unpopulated resistors R5 and R6.

Note that with lower shunt resistor values also the JB1 jumper resistance starts to play a role and may influence the measurement. This can be easily compensated by slightly increasing the shunt resistance value in the winIDEA setup dialog, by 0.01Ω, for example.


Jumper block for selecting different voltage ranges.

Note: 1) Never set more than one jumper position at a time.

Three of the five available positions are populated with resistor dividers:



Voltage Multiply (configuration)










The remaining two positions are available for a custom user setup with unpopulated resistors R12 and R13. The lower part of the voltage divider is set by the R9 of 10kΩ.


Switches target power on or off.


Power LED. Note that the LED needs a very small current to light and may glow because of a parasitic current flowing, for example, when the emulator switched on and the target is off. Procedure

Switch off target and emulator

Power down the target supply

Select 2.5A or higher target current range to be on the safe side

Select 20V voltage range

Set SW1 to OFF position

Connect target supply to P1 or P2

Connect target to P4 or P5

Connect the ST1 voltage probe to the IOM AIN0 input

Connect P3 to the IOM Current Sense connector

Switch emulator on

Switch target supply on

Switch SW1 to ON position

Now, you are set to go.

In case the target current and/or voltage are below the other given ranges, repeat the procedure above and select appropriate ranges to improve resolution of the measurement.

To verify that the displayed voltage and current values are correct, use an independent voltage and current measurement instrument.

2.2Initial Configuration

I/O module startup configuration is performed in Hardware/Options dialog.

All signals are accessible (HIL interface) by a configurable symbolic name. I/Os are mapped as follows:


HIL Mapping


Digital IN



Digital OUT



Analog IN



Analog OUT





If set, the selected input will be shown in the HIL plugin. IN


Multiplier specifies by how much the detected input is multiplied.

If a signal is externally divided by 10, set the multiplier to 10.

Advanced configuration

The button next to signal name allows further configuration of an analog signal.

Range setting provides means to display an analog signal scaled to the range of interest.

Full        the signal is scaled between minimum and maximum measurable range

Fixed        the signal is scaled between the configured Min and Max values

Auto        the signal is scaled between minimum and maximum recorded values






The output cannot be driven


The output can be driven manually

Initial state

When the I/O module is initialized, the outputs will assume the specified initial state.

Control pin

Control output pin is a separate digital output pin which may be used for hardware control. It may be used same as the digital output pins, but it cannot be traced.

2.3Monitoring Inputs and Manipulating Outputs

2.3.1Manipulation Dialog

The Hardware/Tools/IO Module dialog provides the monitoring and manipulation capability of the I/O Module.

For all inputs the currently detected state is displayed and periodically refreshed.

Digital and Analog outputs which can be manually driven, can be asserted to the specified value.

Note: the value is asserted when the Set button is clicked.

Control pin

Control output pin is a separate digital output pin which may be used for hardware control.

2.3.2HIL Monitor Plugin

Plugin/HIL Monitor provides the monitoring and manipulation capability of the I/O Module.

To modify an output, double click its value in the Value column.

To refresh the inputs manually, click the  icon.

To refresh the inputs manually, click the  icon.

2.3.3Watch Window and Evaluation Expressions

HIL variables can be added to the watch window (including standard expressions), by using the grave accent ` prefix.


I/O module trace is supported either in combination with the trace port or stand alone. Open Hardware / Analyzer Setup dialog and choose either one of the trace ports or the I/O module:

Note: It is not possible to use I/O module trace in combination with the on-chip trace buffer, because the I/O module trace messages can not be synchronized to the MCU's trace messages in such case.

All Input signals are sampled simultaneously. The sampling is configured in the Hardware / Options dialog.


Qualifier defines an additional filter for sampling.

Every clock – a sample is taken at every 20MHz internal clock

Every 4 / 16 / 64 clocks – a sample is taken at a divided rate

On change – a sample is taken only when the states on the input lines change. This reduces the amount of recorded data.

Note: only input lines which are not disabled in the Hardware/Options dialog are monitored for change.

Show Outputs in Analyzer

If this option is checked, the output channels will be available in the Analyzer. If not, only input channels are available. configuration

The I/O module can generate a trigger for the iC5500 / iC6000 trace engine. Configuration is available in the Manual trigger configuration dialog of the Analyzer window.

Trigger determines the condition upon which the I/O module will signal the iC5000 to start recording.


Enables the I/O module trigger output to the iC5000 trace engine.

Digital IN

Digital inputs 0 – 7 can be a trigger source. Two combinations of digital inputs (Condition 1 and Condition 2) can be defined.

trigger if this input is in low state

trigger if this input is in high state

do not consider this input in the trigger condition

A condition is fulfilled if the enabled inputs match the configured value.

The trigger will be generated if either of enabled Conditions matches.

In the above example, trigger is generated if DIN4 is high and DIN6 is low, or AIN0 is below 2.9V.

Analog IN 0 and 1

Both analog inputs can be a trigger source. The trigger is generated if the measured voltage is Lower or Higher than the specified threshold.

Qualifier determines the type of I/O module acquired information which is recorded in the trace buffer and streamed to the host.

Record all

If this option is checked then all I/O module inputs are recorded. Otherwise no I/O samples are recorded.


Real-time profiling of I/O module’s signals is available in Analyzer’s Profiler mode.

To enable profiling, enable the AUX option in the Profiler configuration dialog and list the channels you want to trace:

For each channel specify the description, channle and the value interpretation:

Note that in order to select output channels (DOUT / AOUT), the option Show Output in Analyzer must be enabled. The option can be found in the Hardware / Options dialog.

State variable interpretation will produce more detailed profiling analysis, but is limited to a number of samples that it can analyze. For analog values it is recommended to select a Regular variable.

For more information refer to the Analyzer Window chapter.


testIDEA is using the HIL interface to gain access to the I/O Module. This allows setting of inputs prior to performing a unit test:

…and evaluation of outputs after the test. Please note the syntax for specifying the IO channels:

For more information please refer to testIDEA manual.

2.3.7isystem.connect access

External applications can use isystem.connect to monitor and manipulate the I/O module via the HIL interface class CHILController.

This Python example demonstrate s reading and writing analog and digital I/Os. Make sure you use channel names as specified in the Hardware / Options dialog.

import isystem.connect as ic

#create connection and hil controller object

cMgr = ic.ConnectionMgr()


hilCtrl = ic.CHILController(cMgr)

#set analog output to specified voltage level

def AnalogOutputWrite(channelName, voltageLevel):

 hilCtrl.write('AOUT.' + channelName + ': ' + voltageLevel)

#get analog input voltage level

def AnalogInputRead(channelName):

 return'AIN.' + channelName)

#set digital output to specified level

def DigitalOutputWrite(channelName, state):

 hilCtrl.write('DOUT.' + channelName + ': ' + state)

#get digital input state

def DigitalInputRead(channelName):

 return'DIN.' + channelName)

AnalogOutputWrite('AOUT0', '1.8')

print "Analog input AIN0 voltage level: ", AnalogInputRead('AIN0')

DigitalOutputWrite('DOUT0', 'HIGH')

print "Digital input DIN0 state: ", DigitalInputRead('DIN0')

Disclaimer: iSYSTEM assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information herein.

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