MAN - GMM AM128 - UK - 5.00

grifo ®

ITALIAN TECHNOLOGY

GENERAL INFORMATION

GMM AM128 ( grifo ® Mini Module with ATmega128L) is a module based on microcontroller

Atmel ATmega128L, a powerful and complete system on a chip provided with CPU, integrated memory (both for data and code), a watch dog, many digital I/O lines, 4 multifunction timers

counters with capture and compare capability, two asynchronous serial lines, one I 2 C BUS synchronous seria linel, 2comparators for analog signals,one 8 channels A/D converter, etc.

In module's very small area, are already mounted the components that exploit microcontrollers's performance and that allow each functionality mode like a reset generator circuitery.

Possible applications of GMM AM128 Mini Modules are several.

For example, smart Intelligent Nodes with local functionalities as PID algorithms for controlling temperatures, motors, valves, etc. or decentralized systems as robots, automation of production line machines, big factory automations.

Moreover Teleacquisition and Telecontrol on medium and low distances, the Home Automations

(lights turning ON/OFF, heating and cooling systems control, supervision of electric devices, security and acces control systems), car automations (lights turning ON/OFF, heating and cooling systems control, supervision services for drivers, anti-teft and acces control systems, functionality checks).

It is really important the Didactics use in fact GMM AM128 offers a very low cost system suitable to learn a RISC microcontroller with AVR core and to develop the typical start applications for the students.

For this purpose it is likewise interesting the GMM TST 2 support card that solves the problems for power supply, for serial connection to development PC and for module lines connection.

In the same support card there is a matrix keyboard and a LCD display that allow test and experience with low cost user interface solutions.

GMM AM128 is delivered with a Boot Loader preinstalled. This program allows to reprogram Flash and EEPROM through a simple RS 232 serial port (for example, PC COM port).

On board microcontroller electronics also supports the well-known JTAG interface, that allows to control its working status directly on the application it is running.

In this case debugging is controlled through the PC and a specific interface to connect to the six signals of Mini Module directly available on its socket.

The PC program that controls JTAG interface is AVR Studio, free IDE developed by Atmel they distribute through their website.

Both the solutions ensure a short time to market: the user can obtain a prototype or even a ready product in one week.

Overall features are:

- Standard container with 40 pins male socket, dual in line, 100 mils pitch, 600 mils width.

- Very small dimension: 62 x 23 x 15 mm.

- Single power supply voltage required in the wide range from 3.0 to 5.0 Vdc, 31 mA max.

(the current consumption can change according with module connections).

- Availability of power saving setting as idle mode and power down mode.

- Atmel ATmega128L microcontroller with external 7.3729 Mhz crystal.

- 128 KBytes FLASH for code, up to 8KByes FLASH can be reserved for Boot Loader,

4KBytes RAM for data, 4KBytes EEPROM for data.

- 2 analog comparators channels with different input and output configurations options that allow to create easily bipolar A/D conversion.

Page 4 GMM AM128 Rel. 5.00

ITALIAN TECHNOLOGY grifo ®

- 8 channels multiplexed A/D converter, resolution 10 bits and 120 µsec conversion time.

- 35 interrupt sources.

- 4 Timers Counters, up to 16 bits, with functions of PWM, compare, capture, etc.

- Up to 36 digital I/O lines available on connector. Some of these lines have multiple functions.

- Two hardware serial communication line with programmable physical protocol

(Baud Rate up to 115200 Baud, 8 or 9 data bits, 1 or 2 stop bit), RS 232 buffered or at

TTL level.

- JTAG interface for in-circuit remote debuggin.

- I 2 C BUS controller, completely software configurable.

- SPI interface programmable for syncronous, high speed communications.

- Reset circuitery.

- One Real Time Clock for long and accurate timing, active even in low power modes, capable to manage date and time and to generate periodic interrupts.

- 240 bytes of SRAM for configuration parameters.

- RTC and SRAM backed with on-board Lithium battery.

- Watch Dog section that protect the controlled system in any operating condition.

- 2 status LED tmanaged by software through one digital I/O line.

- Two Dip switches for operating modes selection of the Mini Module.

- Internal FLASH and EEPROM can be managed through ISP (In System Programming).

- Boot Loader preinstalled that allows to program microcontroller FLASH and EEPROM through a serial port.

- Wide range of software development tools used to develop the user application program, as: Assembler; C compilers (ICC AVR, DDS Micro C); BASIC compilers

(BASCOM AVR); Integrated Develoment Environment (AVR Studio); etc.

- Long list of demo programs and use examples supplied under source form, duly remarked, and executable form for the available development tools.

Here follows a description of the board's functional blocks, with an indication of the operations performed by each one.

To easily locate such section on verify their connections please refer to figure 2.

GMM AM128 Rel. 5.00

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