Digi BL1800 user manual Existing

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The thermistor has a nominal room-temperature resistance of about 10 kΩ, which drops to about

6kΩ at 40°C. Once you solder the thermistor onto the RT1 pads (see Figure B-5) on the Prototyping Board, the A/D converter readings on AD0 will change with temperature.

If the 10 kΩ potentiometer is removed, the change in A/D converter readings with temperature will be larger.

	LS1				R3
	Buzzer				3
	Buzzer				2
					2
COIL()-	R1				+
COIL()-	R1				1
		HV0	+RAWPOT PE4			GND AD0
	JP2				RT1
		BZR VCC	K	AD0	PD0
		BZR VCC	K	AD0
				DS1		S1

10kW Potentiometer

Thermistor

The LEDs can be mounted in positions DS5–DS8, shown in Figure B-6,to display the complete status for Parallel Port A.

The serial cable included in the parts bag can be used to connect the Jackrabbit’s RS-232 outputs from header J1 on the Prototyping Board to an available PC serial port.

Unlike the CMOS-level signals on header J3, the programming port on the Jackrabbit board, the sig- nals on header J1 on the Prototyping Board are full RS-232 level signals without needing the CMOS to RS-232 converter that is present in the program- ming cable. The RS-232 level signals are processed via the MAX232 transceiver chip, U4, on the Jack- rabbit board to Serial Ports B and C of the Rabbit 2000. The CMOS-level signals on the program- ming port are connected to Serial Port A.

Figure B-5. Thermistor and

Potentiometer Locations

		}	DS1	S1
Existing			DS2
LEDs	}		DS3	S2
			DS3	S2
			DS4	S3
			DS5
Add			DS6
Dev Kit			DS6	S4
Dev Kit			DS8 DS7 DS9
LEDs				PWR
				PWR

Figure B-6. LED Location

User’s Manual

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Contents Programmable Single-Board Computer Jackrabbit BL1800Digi International Inc TrademarksTable of Contents Index Schematics Introduction FeaturesDevelopment and Evaluation Tools Jackrabbit FeaturesAdditional Product Information How to Use This ManualOnline Documentation Immunity CE ComplianceEmissions Design Guidelines General SafetyInterfacing the Jackrabbit to Other Devices Jackrabbit BL1800 Getting Started Development Kit ContentsDevelopment Hardware Connections Attach Jackrabbit to Prototyping Board BoardAssemble AC Adapter Connect Programming CableConnect Power Installing Dynamic C Run a Sample Program TroubleshootingReal-Time Clock Where Do I Go From Here?Technical Support BL1800 SubsystemsHeaders Jackrabbit PinoutsDigital Inputs Digital Inputs/OutputsHV3 Sourcing Output Digital OutputsConfigurable High-Current Output Changing HV3 to a Sinking Output Bidirectional I/OA/D Converter Schematic Diagram of A/D ConverterJackrabbit BL1800 D/A Converters Schematic Diagram of D/A Converters1 DA1 V ⋅ 1 e RCTypical DA1 Voltages for Various Duty Cycles Typical DA0 Voltages for Various Duty Cycles 2 DA0User’s Manual 1 RS-232 Serial Communication2 RS-485 Ground recommended 485 R16 Programming PortUser’s Manual Programming Cable Changing Between Program Mode and Run ModeSram MemoryFlash Eprom External Interrupts Other HardwareClock Doubler Spectrum Spreader Jackrabbit BL1800 An Overview of Dynamic C Software ReferenceJackrabbit BL1800 Jackrabbit Sample Programs Sample ProgramsSample Program DEMOJR1.C DEMOJR1.CWatch Expression Break Point Single-SteppingEditing the Program Summary of FeaturesWatching Variables Dynamically User’s Manual Other Sample Programs Illustrating Digital I/O R/W pin and DB0-DB3 on 3 RS-232 Serial Communication Sample Programs 4 RS-485 Serial Communication Sample Program Cooperative Multitasking Int vswitch Advantages of Cooperative Multitasking 1 I/O Drivers Jackrabbit Function CallsVoid digOutint channel, int value Void anaOutint channel, int value Void anaInint channel, int *value Serial Communication Drivers Patches and Bug Fixes Upgrading Dynamic CAdd-On Modules Appendix A. Specifications Figure A-1shows the mechanical dimensions for the Jackrabbit Electrical and Mechanical SpecificationsTable A-1. Jackrabbit Board Specifications Exclusion Zones Exclusion ZoneFigure A-3. User Board Footprint for Jackrabbit Figure A-4. Location of Jackrabbit Configurable Positions Jumper ConfigurationsTable A-2. Jackrabbit Jumper Configurations Conformally coated area Conformal CoatingJackrabbit Use of Rabbit 2000 Parallel PortsTable A-3. Jackrabbit Pinout Configurations PD0 PD1 Jackrabbit BL1800 Appendix B. Prototyping Board Prototyping Board Overview Jackrabbit Connectors User LEDs BuzzerPrototyping Board Features Top Side Mechanical Dimensions and LayoutTop Side Using the Prototyping BoardRelay Demonstration BoardExisting Top Side Prototyping BoardPE0 VCC HV0 SM1 SM0 HV2 Stat Jackrabbit BL1800 Power Supplies Appendix C. Power ManagementDcin Current mA 950 mA·h = 5.4 years 20 µA Batteries and External Battery ConnectionsFigure C-5shows the Jackrabbit battery backup circuitry Battery Backup CircuitReset Generator Power to Vram SwitchChip Select Circuit Figure C-7shows a schematic of the chip select circuitJackrabbit BL1800 SMODE0 SMODE1 IndexRABDB01.C RABDB02.C Schematics