Analog Devices ADuC812 manual Quickstart Development System, ADSIM-Windows Simulator

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ADuC812

Note that the serial port debugger is fully contained on the ADuC812 device, (unlike “ROM monitor” type debuggers) and therefore no external memory is needed to enable in-system debug sessions.

Single-Pin Emulation Mode

Also built into the ADuC812 is a dedicated controller for single-pin in-circuit emulation (ICE) using standard production ADuC812 devices. In this mode, emulation access is gained by connection to a single pin, the EA pin. Normally, this pin is hard- wired either high or low to select execution from internal or external program memory space, as described earlier. To enable single-pin emulation mode, however, users will need to pull the EA pin high through a 1 kΩ resistor as shown in Figure 46. The emulator will then connect to the 2-pin header also shown in Figure 46. To be compatible with the standard connector that comes with the single-pin emulator available from Accutron Limited (www.accutron.com), use a 2-pin 0.1-inch pitch “Friction Lock” header from Molex (www.molex.com) such as their part number 22-27-2021. Be sure to observe the polarity of this header. As represented in Figure 46, when the Friction Lock tab is at the right, the ground pin should be the lower of the two pins (when viewed from the top).

Enhanced-Hooks Emulation Mode

ADuC812 also supports enhanced-hooks emulation mode. An enhanced-hooks-based emulator is available from Metalink Corporation (www.metaice.com). No special hardware support for these emulators needs to be designed onto the board since these are “pod-style” emulators where users must replace the chip on their board with a header device that the emulator pod plugs into. The only hardware concern is then one of determin- ing if adequate space is available for the emulator pod to fit into the system enclosure.

Typical System Configuration

A typical ADuC812 configuration is shown in Figure 46. It sum- marizes some of the hardware considerations discussed in the previous paragraphs.

QUICKSTART DEVELOPMENT SYSTEM

The QuickStart Development System is a full featured, low cost development tool suite supporting the ADuC812. The system consists of the following PC-based (Windows-compatible) hard- ware and software development tools.

Hardware:

ADuC812 Evaluation Board, Plug-In

 

Power Supply and Serial Port Cable

Code Development:

8051 Assembler

Code Functionality:

Windows Based Simulator

In-Circuit Code Download:

Serial Downloader

In-Circuit Debugger:

Serial Port Debugger

Miscellaneous Other:

CD-ROM Documentation and

 

Two Additional Prototype Devices

Figure 47 shows the typical components of a QuickStart Development System. A brief description of some of the software tools components in the QuickStart Development System is given below.

Figure 47. Components of the QuickStart Development System

Figure 48. Typical Debug Session

Download—In-Circuit Serial Downloader

The Serial Downloader is a Windows application that allows the user to serially download an assembled program (Intel Hex format file) to the on-chip program FLASH memory via the serial COM1 port on a standard PC. An Application Note (uC004) detailing this serial download protocol is available from www.analog.com/microconverter.

DeBug—In-Circuit Debugger

The Debugger is a Windows application that allows the user to debug code execution on silicon using the MicroConverter UART serial port. The debugger provides access to all on-chip periph- erals during a typical debug session as well as single-step and break-point code execution control.

ADSIM—Windows Simulator

The Simulator is a Windows application that fully simulates all the MicroConverter functionality including ADC and DAC peripherals. The simulator provides an easy-to-use, intuitive, inter- face to the MicroConverter functionality and integrates many standard debug features; including multiple breakpoints, single stepping; and code execution trace capability. This tool can be used both as a tutorial guide to the part as well as an efficient way to prove code functionality before moving to a hardware platform.

The QuickStart development tool-suite software is freely available at the Analog Devices MicroConverter Website www.analog.com/microconverter.

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Contents General Description Functional Block DiagramADuC812 Table of ContentsCalibrated Endpoint ERRORS5 ADC Channel Specifications DC ACCURACY3Temperature SENSOR10 DAC Channel Specifications DC ACCURACY11FLASH/EE Memory Performance CHARACTERISTICS12 DAC AC CharacteristicsWatchdog Timer Characteristics Power Supply Monitor CharacteristicsDigital Outputs Power REQUIREMENTS14, 15Isource = 80 ∝A Isource = 20 ∝ATemperature Package Model Range Description Option PIN ConfigurationOrdering Guide Mnemonic Type Function DAC Specifications ADC SpecificationsTerminology Thus for a 12-bit converter, this is 74 dBMemory Organization ARCHITECTURE, Main FeaturesBit Name Description Special Function Registers Default Value SFR Address SFR NotesGeneral Overview ADC Circuit InformationADC Transfer Function Typical OperationAQ1 EFHAQ0 #ADC Clks ADCCON1.1 T2CLocation Name Description CS3 CS2 CS1 CS0 CH#Bit Location Status Description Op Amp Model Characteristics Driving the A/D ConverterTable VI. Some Single-Supply Op Amps Configuring the ADC ADC DMA ModeVoltage Reference Connections External memory must be preconfigured. This consists Where the ADC Results are to be written. This is done byDMAP. Dmal must be written to first, followed by Dmah and then by DmapSFR area Byte Program SequenceNonvolatile Flash Memory B9H EconEadrl C6HCommand Byte Command Mode Mode FDHRNG1 RNG0Resistor String DAC Functional Equivalent Using the D/A ConverterSource and Sink Current Capability with Vref = VDD = 3 PRE2 C0HPRE1 PRE0 PRE2 WDR1DCH DFHCMP PsmiOOH F8HIspi WcolSPR0 SPR1SPR1 SPR0 F7H2C Control Register I2CCONCompatible ON-CHIP Peripherals Pin Alternate FunctionT2CON TMOD, TconTR1 TF1TF0 TR0TIMER/COUNTER 0 and 1 Operating Modes Mode 3 Two 8-Bit Timer/CountersMode 1 16-Bit Timer/Counter TF2 C8HEXF2 RclkCAP2 TR2 Mode Rclk or TclkOFF SM1 SM0SM0 SM1 SM2Baud rate in Mode 0 is fixed Smod CLKRCAP2H RCAP2L Eadc A8HET2 ET1Source Vector Address Source Priority DescriptionADuC812 Hardware Design Considerations Clock OscillatorExternal Memory Interface ADuC812-based system as well as during its normal power-on Down to 1.2 V or less. The timing diagram of illusLevel. The external POR circuit must be operational High it tracks the voltage on DVDD. These recommendationsIdle Mode Normal ModeVDD = 5 VDD = 3 Core NAs ⋅ Mclk +System Grounding Schemes Grounding and Board Layout RecommendationsIn-Circuit Serial Download Access Other Hardware ConsiderationsEmbedded Serial Port Debugger ADSIM-Windows Simulator Quickstart Development SystemXTAL1 Width Low XTAL1 Period 83.33 62.5 1000XTAL1 Width High XTAL1 Rise TimeExternal Program Memory 12 MHz Variable Clock Parameter Min Max UnitExternal Data Memory Read Cycle External Data Memory Write Cycle Input Data Setup to Clock 300 2t CK + Output Data Setup to Clock 700 10t CKSerial Port Clock Cycle Time 12t CK Input Data Hold after ClockI2C-COMPATIBLE Interface Timing Parameter Min Max UnitParameter Min Typ Max Unit SPI Master Mode Timing Cpha =Data Output Setup before Sclock Edge 150 SPI Slave Mode Timing Cpha = SS to Sclock EdgeSS High after Sclock Edge Data Output Valid after SS Edge Outline Dimensions Entire Data Sheet has been revisedLocation Data Sheet changed from REV. a to REV. B Lead Plastic Quad Flatpack
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