GMM 518

grifo® Mini Module Atmel AT89C51AC2

It Doesn't Need Programmer.

Just the Serial Line.

The picture shows GMM 518 that has the dimension of DIP28 integrated circuit. The GMM 518 is equipped with Atmel AT89C51AC2 microcontroller.

GMM 518 English Tech. Manual PDF format.

Ver. 5.00 - Rel. 15 September 2011

GMB HR84 + GMM 518 English Tech. Manual PDF format.

Ver. 5.00 - Rel. 11 August 2011

GMM 518 possible applications

  • Integrated system that can be used directly on the board developed by the user a macro component.
  • Smart intelligent nodes with local functionalities as PID algorithms for controlling temperatures, motors, valves, etc.
  • Teleacquisition and telecontrol on medium and low distances.
  • Home automation: lights turning ON/OFF, heating and cooling systems control, supervision of electric devices, security and acces control systems.
  • Car automation: lights turning ON/OFF, heating and cooling systems control, supervision of electric devices, anti-teft and acces control systems, functionality checks.
  • Didactics: GMM 518 offers a very low cost to learn 8051 Core, we have many starter kits options. For this purpose it is likewise interesting the CAN GMT or GMM TST3 support card.
  • Whenever there is a short time to market: the user can see a prototype or even a ready product in one week.
  • Decentralized systems as robots, automation of production line machines, big factory automations.


  • Standard container with 28 pin male socket, dual in line, 100 mils pitch, 600 mils width.
  • Very small dimension: 20,6 x 42,6 x 15 mm.
  • Weight: 6,8 g.
  • 4 layers printed circuit to obtain best noisy resistance and best EMI performance.
  • No external programmer is needed as GMM 518 is a grifo® ISP (In System Programming) Mini Module. FLASH of Micro is Programmable and Erasable by using serial line only.
  • Micro FLASH programming or deleting can be managed by using the FLIP program available from ATMEL.
  • Single power supply required +5Vdc 10-14mA (the current consumption can change according with module connections).
  • Availability of power saving setting as idle mode and power down mode.
  • Atmel T89C51AC2 microcontroller (8051 code compatibile) with 14,74 MHz crystal.
  • Programmable machine speed at 12 or 6 clock cycle.
  • 32K FLASH for code, 2K FLASH for boot loader, 256 bytes RAM for data, 1K ERAM for data, 2K EEPROM for data.
  • 8 A/D converter channels with 10 bits resolution, 20 µsec conversion time.
  • A/D reference voltage available on connector.
  • 14 interrupt sources with 4 priority levels.
  • 3 Timers Counters up to 16 bits
  • 5 PCA channels up to 16 bits with PWM, watch dog, compare, capture, etc. functionality.
  • Watch Dog section that protect the controlled system in any operating condition.
  • 24 digital I/O lines available on connector. Some of these lines have multiple functions.
  • Hardware serial line with programmable Baud Rate up to 115200 Baud, RS 232 buffered or at TTL level.
  • Transceiver MAX3222, for RS 232 serial line, with ESD protection up to ±15KV.
  • Reset and power supply control circuit based on MAX825.
  • 5 configuration jumpers, with 1 acquired by firmware.
  • Status LED managed by firmware.
  • Internal FLASH and EEPROM can be managed through In System Programming, or when the module is already mounted, by using the serial communication line.
  • Freeware software for PC, that supports the ISP programmation to dowload the generated code, inside on board FLASH.
  • Wide range of development tools as: Assembler (MCA51); C compiler (µC/51, HTC51, SYS51CW, DDS Micro C51); BASIC compiler (BASCOM 8051); PASCAL compiler (SYS51PW); etc.
  • Long list of demo programs and use examples supplied under source form, duly remarked, for the available development tools.

The picture shows the test card that mount a grifo® Mini Module type GMM 518.

The picture shows grifo® Mini BLOCK GMB-HR84 that mount a grifo® Mini Module type GMM 518.


FLexible In-system Programmer


FLIP is a free PC-based software tool that supports the "In-System Programming" (ISP) of Atmel's Flash C51 microcontrollers through various communication interfaces, including RS232, USB and CAN links, both in Windows® 9x/Me/2000/XP, Windows NT® and Linux® environments FLIP can be used through a Graphical User Interface or launched from a DOS command window.
FLIP is a powerful toolset which enables the user to easily embed Atmel's ISP function libraries (DLL) within their applications without having to know the details of Atmel's ISP protocols. FLIP adds flexibility, power and user-friendliness to Atmel Flash C51 devices In-System Programming.

Available Free on Atmel's Web Site!


 A C C E S S O R I E S


GMB- Housing, 8 Opto-In, 4 Relay

Housing Mini BLOCK Module witch 8 Opto-In and 4 Relay Outputs; Serial Line RS232 or TTL, RS422/485, Current Loop, CAN; Power Supply.

GAB H844

GAB- Housing, 8 Alalog-In, 4 Opto-In, 4 Relay

Housing Analog BLOCK Module witch 8 Analog-In ,4 Opto-In, 4 Relay Outputs; Serial Line RS232 or TTL, RS422/485, Current Loop;1 I2C BUS line, 1 Serial Line USB or CAN; Power Supply.


GMB - Housing, 16 Opto-In, 8 Relay

Housing Mini BLOCK Module witch 16 Opto-In and 8 Relay Outputs; Serial Line RS232 or TTL, RS422/485, Current Loop; Power Supply.



Connector KIT Set, 4 pins

4 Female pins + AMP plastic housing for GMB_HR84, etc..


 AMP8 Cable

AMP Cable Connector, 8 pins

1 m cable with 8 pins female AMP connector for QTP_03, etc..

EL 12

The EL 12 module is a complete, low cost, power supply with extremely reduced dimension, that can be used in conjunction with grifo® cards as SDI 02, QTP 12, QTP 16Big, QTP 16, QTP 22, QTP 24, QTP G28, etc.


W95/NT 8051-BASIC Compiler

BASCOM-8051© is a Windows BASIC COMPILER for the 8051 family It is designed to run on W95/NT and has all the features of BASCOM LT. In addition it has full support for arrays and the single floating point type.

µ C / 5 1

ANSI C Compiler for 8051

Develop high quality software for any 8051 in ANSI C. µC/51 comes with an incredible optimizing compiler, you can even write software in ANSI C on 8051's with 1kB of code memory! µC/51 is absolutely complete: user friendly multi file Editor, Compiler, Assembler, Downloader, Source
Level Debugger. You will not need anything else.


Pascal Compiler per 8051

The Pascal dialect used is an almost complete version of Wirth's Pascal, extended to, in a simple way, to take advantage of the special hardware facilities contained in the 8051 and 80251 family chips. Versions 5 and 6 furthermore contains objects and separately compiled units.


The LadderWORK Integrated Development Enviroment (IDE)

The picture below, represents the apperance of the program LadderWORK on your computer. LadderWORK has an integrated enviroment feature, allowing you to draw schematics, compile programs and upload code to PLC always working on the same window. The integrated enviroments are composed by several parts described below. 


Page up-dated at September 24, 2011

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