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Analog Devices MICROCONVERTER ADUC812 Reference Manual
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Analog Devices MICROCONVERTER ADUC812 Reference Manual

Analog Devices MICROCONVERTER ADUC812 Reference Manual

Quickstart development system
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Summary of Contents for Analog Devices MICROCONVERTER ADUC812

  • Page 1 C812 E VALUATION OARD EFERENCE UIDE “ C812 ICRO ONVERTER • D UICK TART EVELOPMENT YSTEM...
  • Page 2 ADuC812 Evaluation Board Reference Guide Evaluation Board Overview ONTENTS Evaluation Board Reference Guide: 1) Evaluation Board Overview ......3 2) Evaluation Board Features .
  • Page 3 ADuC812 Evaluation Board Reference Guide Evaluation Board Overview • Power Indicator/General Purpose LEDs (see section 2) • Example LDR Demonstration Circuit (see section 5) OTES 1. All references in this document to physical orientation of components on the board are made with respect to a component side view of the board with the battery connections appearing in the top right corner of the board.
  • Page 4 ADuC812 Evaluation Board Reference Guide Evaluation Board Features (2) E VALUATION OARD EATURES Power Supply: A 9V supply is fed to the board via the 2.1mm input power socket (J4). The input connector is configured as ‘CENTER NEGATIVE’ i.e. GND on the center pin and +9V on the outer shield. Alternatively the user can connect a 9V battery via J9(-) and J10(+).
  • Page 5 ADuC812 Evaluation Board Reference Guide Evaluation Board Features Configuring the memory as a code memory might be useful in some applications. It is necessary for the Keil Monitor-51 which requires von-Neumann wired code and XData memory. To configure this memory as a data and code memory switch link 4 to the on position.
  • Page 6 ADuC812 Evaluation Board Reference Guide Evaluation Board Features A RESET push button is provided to allow the user to manually reset the part. This button is at the input to the ADM809 (Power on Reset chip) so a delay of 240ms approx will be required for the part to be actually released from reset after the button is released.
  • Page 7 ADuC812 Evaluation Board Reference Guide (3) L PTIONS LK1 (2x1) LDR Demo Connection Function: Allows the user to connect the output of the voltage divider to ADC1. Use : Slide LK1 into the ON position to connect the output of the voltage divider to ADC1. Slide LK1 into the OFF position for normal operation of analog input ADC1.
  • Page 8 ADuC812 Evaluation Board Reference Guide Slide LK5 into the ON position to connect the 66 pin to the external SPI/I2C connector. Use : Slide LK3 into the OFF position for normal device operation of analog input ADC5. LK6 (2x1) Connect T2 to Time/Strobe Connector Function: Allows the T2 pin to be connected to the Timer/Strobe connector Use : Slide LK6 into the ON position to connect the T2 pin to the external Timer/Strobe connector.
  • Page 9 ADuC812 Evaluation Board Reference Guide Note: This link can also be used with the Accutron ACE emulator. The single pin emulator simply connects to this link. LK12 (3x1) External Data Memory Function: This link is used to configure the external data memory map. Either the bottom 32k Bytes of the external data memory space is mapped or the bottom 256 bytes in the first 128 pages is mapped.
  • Page 10 ADuC812 Evaluation Board Reference Guide (4) E XTERNAL UNCTIONS ONNECTORS J1 Analog I/O Connector The analog I/O connector J1 carries all ADC inputs and DAC output channels as well as the external V input. The pinout and orientation of this connector is shown below. Figure 2: The Analog I/O connector J2 Function Function...
  • Page 11 ADuC812 Evaluation Board Reference Guide Function Function PortX.0 PortX.5 PortX.1 PortX.6 PortX.2 PortX.7 PortX.3 DGND PortX.4 DGND Table 2: Pin functions for Port0, Port2 and Port3 connectors J3, J6, J7 J4/J9/J10 Power Supply Connections J4 allows for the connection between the evaluation board and the 9V power supply provided in the ADuC812 QuickStart Development System.
  • Page 12 ADuC812 Evaluation Board Reference Guide (5) LDR D EMONSTRATION IRCUIT LDR C SING THE IRCUIT As can be seen from examining the schematic an example LDR circuit is connected shown in Figure 2 below: Application Code Circuit diagram of the LDR Circuit Using the sample code in \code\adc\adcldr.asm the variation in the resistance of the ldr can be seen by the reducing brightness of the output led as the amount of light is decreased.
  • Page 13 986-501 Farnell LK12 SP Changeover Header SP3T Changeover Header JsC4-16-GO Futora Electronics LK11 2x1(with Friction Lock) Square Pin Header with friction lock 143-139 Farnell R1-R8 Surface Mount Resistor, 0805 Case 771-181 Farnell  Version 1.0 Analog Devices Inc., MicroConverter www.analog.com/microconverter...
  • Page 14 9V Snap On Battery connector Female 723-988 Farnell 3X2 Pin Header Double row link header .148-535 Farnell Testpoint Raised Loop Testpoint 240-345 Farnell 11.0592MHz Crystal Watch Crystal in HC49/4H 263-734 Farnell Catalog Pg. 1426  Version 1.0 Analog Devices Inc., MicroConverter www.analog.com/microconverter...