Den Svævende Kugle, Dokumentation [pdf - sorenr.dk

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<strong>Den</strong> svævende kugle 6.3 Hardware 6.3.7 STK500 Userguide Pull up 82 3.2 Description of User Switches Note: The AVR can source or sink enough current to drive a LED directly. In the STK500 design, a transistor with two resistors is used to give the same amount of light from the LED, whatever the target voltage (VTG) may be and to turn off the LEDs when VTG is missing. Ingeniørhøjskolen ˚Arhus 2005 Gruppe 3 The switches connected to the debug headers are implemented as shown in Figure 3-3. Pushing a switch causes the corresponding SWx to be pulled low, while releasing it will result in VTG on the appropriate switch header connector. Valid target voltage range is 1.8V < VTG < 6.0V. Figure 3-3. Implementation of Switches and Switch Headers SW n 150R VTG 10K SW n SW0 SW2 SW4 SW6 GND SW1 SW3 SW5 SW7 VTG Figur 84: Pull-up kredsløb til en AVR processor. For flere detaljer se STK500 user guiden p˚a cd-rommen. Note: In the AVR, the user can enable internal pull-ups on the input pins, removing the need for an external pull-up on the push-button. In the STK500 design, we have added an external External 10K pull-up to give Target all users a logical System “1” on SWn when the push-button is not pressed. The 150R resistor limits the current going into the AVR. AVR STK500 User Guide 6-1 1 2 Section 6 In-System Programming of an The STK500 can be used as a programmer to program AVR devices in other applications. There are two different ISP connector pinouts available: a 6-pin and a 10-pin version. Both are supported by STK500. Figure 6-1. 6-pin ISP Connector Pinout 1 2 3-2 MISO VTG AVR STK500 User Guide 1925C–AVR–3/03 SCK MOSI RST GND Figure 6-2. 10-pin ISP Connector Pinout MOSI NC RST SCK MISO ISP6PIN 1 2 ISP10PIN VTG GND GND GND GND Select the device to be programmed in the same way as programming a device on the STK500. The V CC of the target application is detected by STK500 and signals are converted into voltage levels suitable for the target system. Note: If the other application has its own power supply to VTG, the jumper VTARGET must be removed before connecting STK500 to the other application. STK500 may be damaged if the VTARGET jumper is not removed. Figur 85: Stik til programmering af AVR processor. For flere detaljer se STK500 user guiden p˚a cd-rommen. Rev. 1925C–AVR–3/03
Ingeniørhøjskolen ˚Arhus 2005 Gruppe 3 6.3.8 Datablad for ATmega16 se voltage regulators are monolithic integrated circuits designed as voltage regulators for a wide variety of applications including local, rd regulation. These regulators employ internal current limiting, l shutdown, and safe–area compensation. With adequate heatsinking an deliver output currents in excess of 1.0 A. Although designed ily as a fixed voltage regulator, these devices can be used with al components to obtain adjustable voltages and currents. put Current in Excess of 1.0 A External Components Required rnal Thermal Overload Protection rnal Short Circuit Current Limiting put Transistor Safe–Area Compensation put Voltage Offered in 2% and 4% Tolerance ilable in Surface Mount D2PAK and Standard 3–Lead Transistor kages Figur 86: Støj dæmpende filter til analog3. Output referencen p˚a processoren. For flere detaljer se databladet p˚a cd-rommen. 6.3.9 Spændingsregulator 7805 DEVICE TYPE/NOMINAL OUTPUT VOLTAGE C7805 5.0 V MC7812 C7806 6.0 V MC7815 C7808 8.0 V MC7818 C7809 9.0 V MC7824 evice 8XXACT 8XXACD2T 8XXCT 8XXCD2T 8XXBT 8XXBD2T icates nominal voltage. ORDERING INFORMATION Output Voltage Tolerance 2% 4% OROLA ANALOG IC DEVICE DATA 12 V 15 V 18 V 24 V Operating Temperature Range Package TTJ TJ =0° = 0° to +125°C 125°C TJ TJ = – 40° to +125°C Insertion Mount Surface Mount Insertion Mount Surface Mount Insertion Mount Surface Mount D2T SUFFIX PLASTIC PACKAGE CASE 936 (D2PAK) Order this document by MC7800/D THREE–TERMINAL POSITIVE FIXED VOLTAGE REGULATORS T SUFFIX PLASTIC PACKAGE CASE 221A Heatsink surface connected to Pin 2. Input Cin* 0.33 μF SEMICONDUCTOR TECHNICAL DATA STANDARD APPLICATION MC78XX 1 2 3 Pin 1. Input 2. Ground Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. Output CO** A common ground is required between the input and the output voltages. The input voltage must remain typically 2.0 V above the output voltage even during the low point on the input ripple voltage. XX, These two digits of the type number indicate nominal voltage. * Cin is required if regulator is located an appreciable distance from power supply filter. ** CO is not needed for stability; however, it does improve transient response. Values of less than 0.1 μF could cause instability. © Motorola, Inc. 1996 Rev 4 1 Figur 87: Standard brug af spændingsregulatoren. For flere detaljer se databladet p˚a cd-rommen. 1 2 3 <strong>Den</strong> svævende kugle 6.3 Hardware 83
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Den Svævende Kugle, Dokumentation [pdf - sorenr.dk

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