MICROGenMICROGen Hardware Overview

MICROGen I/Os

MICROGen Communications

Simon Clarke

Technical Director

Introduction to MICROGen MG5xxP hardware

• Protocol converter CAN-CAN, CAN-LIN, LIN-RS232, CAN-RS232, etc

• Rapid control prototyping unit (RCP)

• Robust and protected signal conditioned I/O when required

• Better than 9-18V operation (12V variant, 24V variants available)• CPU operates from 6V upwards

• Compensated backlight and LCD not guaranteed below 9V

• Automotive specification - meets instrumentation EMC and temperature range -30oC to +85oC

• Load Dump and transient protection

• I/O abuse resistant

• Two variants of CPU MPC555, MPC565

MICROGen hardware concept

• Small rugged construction

• Automotive specification

• Highly configurable

• Easy access to user switches

• In-built signal conditioning

• Configurable signal conditioning

• Highly expandable within existing box

Introduction to the MG5xxP

Front of unit Rear of unit

Note: USB socket is no longer functional

MICROGen Architecture

• Stack boards are optional connected via the expansion interfaces

• CLOUD boards also available as a stack board

• Two variants of the CPU board now in use

• MPC565 has more communications• +2 LIN, +1CAN

MICROGen’s I/O Capabilities

• Processor I/O routed to Genix and Standard inputs and PWM’s O/P’s• Higher speed MIOS*, MDA*, QADC*, COMMS etc

• Supports high speed PWM outputs

• Supports high speed PWM inputs

• Support high speed ADC measurement

• Supports communications (CAN LIN etc)

• Expansion Rainbow Stack board option supports TPU*s

• ‘The Stack’ - large amount of high speed I/O via plug-in connectors

• Lower speed requirements met by Queued SPI• Display, DAC’s, Relays, Aux O/P’s• Low Speed Expansion (Rainbow etc)

* For information on these sub modules, refer to MPC5xx documentation.

I/O Capabilities – MICROGen extensions

• External Memory (EEPROM, SDCARD) [MG555 also supports limited eFlash and eRAM]

• Display (LCD Display, LEDS, Sounder)

• Configurable I/O (ADC, Dig I/P, Timing I/P)

• DAC outputs (SPI bus)

• PWM Outputs (With optional Genix Output capability)

• Relays (SPI bus)

• Additional CAN 2.0b Ports

• RS232 Interface (RS485 option)

• LIN Interfaces

• Power-down microcontroller

MicroGen Memory

• 36KB Internal RAM (26KB MPC555)

• 1MB Flash (448KB MPC555)

• 32KB EEPROM (4KB MPC555)

• SDCard 4GB Max (optional, not on MG555)

CPU showing SDCard socket

MICROGen Display Panel

• 10 discrete wide angle bright LEDs

• Backlit LCD display

• Up to 16 Characters of text and symbols

• Backlight may be adjusted (Off – DIM – BRIGHT)

• Contrast may be adjusted

• Sounder with adjustable pitch and duration

Built-in signal conditioning

• Voltage levels shifted from micro-controller to 5 or 18V range according to input type

• Input Protection against static, spikes and load dump

• EMC filtering on inputs to improve signal quality

• Outputs all protected against abuse due to shorts and overloads• Protected outputs limit total current

• Protected outputs have temperature trips

• Software supports scaling to make modelling easier

Genix Inputs

• Genix inputs are configurable via software at build and run-time

• The circuitry feeds both analogue, digital and frequency inputs for the highest possible flexibility

• Configuration as follows:

Genix Signal Conditioning Circuitry

* Gain* Pull Up/Down* Input load* Filtering

GND

VT

MICROGenGenix I/PConnector

MPC555QADC MODULE

MPC555MDA

Equivalent “Genix” Input

• Active Pull up /Down via software

• Active gain selection

• Active Loading selection

“Genix” Input Applications

• Hall effect wheel speed sensors (non directional)

• Digital input sensors

• Analogue position sensors

• PWM – analogue measurement (with filter)• Synchronised with PWM if required

• General ignition enabled switch applications

• Current inputs, eg: 4..20mA inputs

• Thermistor sensor inputs

• Thermostat sensors

• Most digital / analogue signals up to 1KHz…and many more!

Digital input sensors

Analogue Sensors

Current sensors

PWM control

Thermistor inputs

Hall effect sensors Fuel sensor inputs

Voltage monitoring

“Standard” Inputs

• 12 Channels grouped as 3 blocks of 4 inputs

• Uses “Standard Inputs” connector

• Used as analogue inputs

• May be used as digital (with hysteresis) via model

• May be configured with pull up or pull down resistors using internal switches.

• Fixed gain (scaling via software possible)

• Fixed anti-aliasing hardware filter (can sample up to 1mS)

• Fixed input load (4K7) pull-up or down via switches.

• Vt (Pull-to) voltage may be Ignition or external in groups of four

• Non-ignition inputs

“Standard” Inputs

• Genix inputs are configurable via jumper-links.

• The circuitry feeds both analogue and digital inputs but analogue is recommended due to the high digital threshold

• Configuration as follows:

Fixed Signal Conditioning Circuitry

* Fixed Gain

* Pull Up/Down* Fixed Input load* Filtering

GND

MICRO GenStandard I/P

Connector

MPC555QADC MODULE

“Standard” Inputs Cont’d

• One of four channels in group shown

• Pull up / Down to RL

“Standard” Inputs applications

• Switch sensor inputs

• Analogue voltage measurement

• Limit switches

• Finger trap / obstacle sensors

• Analogue position sensors

• System voltage diagnostics

• General switch applications

• Thermostat sensors

…and many more!

switches

Sensor inputs

LED controls

Obstacle sensors

Limit switches

Position sensorsFuel sensors

“DAC” outputs (via SPI Bus)

• 8 Channels of 12 bit DAC

• Uses DAC and Aux connector.

• Scaled for 0 to 18V operation.

• Limits at around Vbatt. (perhaps 500mV less) ideal for 5V and 10V signals

• Controlled from the SPI bus at high speed

• Most suitable for relatively slow or DC voltages

• Up to 30KHz (2 points) achievable by output hardware but speed realistically limited by software sample rates – assume 500Hz max square wave.

“DAC” Outputs cont’d

• Basic configuration…

• 8 Channels available on MG5xxP

“DAC” Output applications

• Analogue meter driver

• Throttle body simulation

• Adjustable LED driving

• Analogue voltage driver to external ECUs

• Analogue signal translations

Scaling, Lookup tables, filtering, special functions

• Outputs from model-based analogue converters

• Temperature sensor simulation

• Multi-Resistance keypad simulation …and many more!

Meter drivers

ECU interfacing

Driving LEDs

Temperature simulation

Analogue RCP

Keypad Simulation

Low current “Aux” Outputs

• 8 Outputs up to max SPI sample rate (no faster than 1ms recommended)

• Up to 1A per channel

• Total of 2.4 amps all channels

• Overload and short circuit protected

• Internal switch for bulb drive to “soften” protection

“Aux” output applications

• Warning lamps

• Up to 12W external lamps

• Switch inputs to other ECUs

• External relay coil drivers

• Switched supply for sensor return

…and many more!

Switch simulation

Driving HMI Interior lighting

Warning lampsExternal lamps

Relay drivers

“PWM” Outputs

• 8 Channels

• Main I/O and additional I/O connector

• 5A @ 100% duty cycle

• Lower frequency PWMs

• Overload protected

• Short circuit protected

• Transient protected

• Driven from MIOS sub module

• “Genix” output re-configurability

“PWM” Outputs Cont’d

• General Configuration

• Programmable logic is “Genix” configuration IC software configuration

“PWM” Driver Equivalent circuit

• General configuration

• Take care with inductive current measurement

• Can be configured as• Low side

• High side

• Active High/Low

High Side Driver

Low Side Driver

One of eight PWM outputs on MICROGen MG555E and PInductive clamping arrangement

Ge

nix

Contr

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ircu

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Optional Clamp

PCB V3.0

Vt PWM

PWMCOM

O/P

“PWM” Applications

• Solenoid drives

• Active suspension

• Valves

• Clutches

• Motor control

• Full bridge motors control with dynamic braking

• External contactor drives

• Switched / dimmed Lamps (Up to 60W)…and many more!

Solenoids

Clutches Full bridge motors

Motor controlValves

Active suspension

Driver lighting

“Relays” (via SPI Bus)

• 8A continuously rated normally open relays (NO) and 3A rated for changeover contacts (NC)

• Main I/O (NO) and Additional I/O (NC) connectors

• 25A Short term rated (<100ms)

• Change over contacts (NO, NC and COM)

• Protected by thermally re-settable fuses

• Medium speed contacts (<10mS)

• Long life relays (107 operations)

• May be paralleled if care taken with model.

“Relays” Cont’d

• Configuration

“Relays” - Applications

• Fan motor drives

• Driving lamps

• Clutch drives

• Isolated switch applications (30V max)

• Single speed motor bridge drives

• Combinational bridge drive with PWM control (more efficient use of resources than PWM bridge)

…and many more!

Solenoids

FAN Motors Combi-bridge motors

Isolated switchesSingle speed motors

Clutch Drives

Driving lamps

MICROGen Communications Capability

• On processor communications• CAN A, B and C (MG555 does not have C)

• Gateway between any two ports possible

• SC1 and SCI2 (LIN / RS232 / RS485)

• Extended communications facilities• CAN Cx and Dx (CAN 2.0b)

• Gateway to any other ports (within bandwidth limits)

• USB (MG555 only via RS232)

• Externally connected RS232-USB now recommended.

• 2 more LIN channels

Main CAN 2.0b Ports

• Uses COMMS connector

• Drivers on CPU board (COMMS board option)

• Other CAN driver configurations available (to order) supporting most common physical interface ICs

• 120R Termination resistors switchable for Terminating ECU

• Terminating ECU Loading capacitors switchable

• Up to 1Mbit performance (500K Baud recommended for download / CCP port)

• 15 Receive identifiers per port available

Additional CAN 2.0b Ports

• Uses COMMS connector

• Drivers on COMMS board (Speed options available)

• Other CAN driver configurations available (to order) supporting most common physical interface ICs

• 120R Termination resistors switchable for Terminating ECU

• Terminating ECU Loading capacitors switchable

• Up to 1Mbit performance

• Up to 6 Receive identifiers per port available

RS232 Port

• RS232 serial interface driver• Supports MICROGen external touch panel option

• Standard 9-Pin DIN

• Basic download facility via Matlab (Requires UART swap option, generally not recommended)

• For 3rd party diagnostics / Calibration tool support / Model profiling

• Can be used for other equipment, such as PSUs, test equipment etc

• Your custom interfacing requirements

• Embedded target for MPC555 supports single byte or 8/16 byte buffered Tx/Rx

• Up to 115,200 Baud achievable

• MICROGen toolbox supports enhanced fast buffered interrupt driven serial library

LIN Port

• LIN driver circuitry• Standard Local Interconnect Network

• Uses COMMS connector

• Single wire 12 Volt bus

• Message based system

• Master and slave supported

• LIN blockset supplied as part of the Toolbox

• Many devices now coming onto the market

• Software does not support LIN standard 2.x yet

CPU Board

• Few direct external connections (None on MG555)

• Main CPU 56MHz (MG555 40MHz)

• Internal RAM 36K (MG555 26k)

• Internal Flash 1MB (MG555 448K)

• No External RAM (MG555 up to 4M)

• No External FLASH (MG555 up to 4M, shorter life expectancy)

• SDCARD up to 4GB (Not supported by MG555)

• EEPROM 16MB (MG555 4MB)

Additional Facilities

• Power-down management microcontroller can put system into ‘sleep mode’ to reduce current.• Enhanced quiescent current (<30mA vs > 100mA)

• Wake up via ignition

• Wake up via CAN activity

• Wake up via external input

• Wake up via LIN activity

• Watch-dog• The CPU can be monitored via the display CPU

• Audible and visual indication of issues

• Software configurable via Simulink

• 5V Regulated Sensor Supply

Wrap up MICROGen hardware I/O overview

Feedback on session

Thank you.