Mezilkree This page is about: As the user manual for its Enhanced Capture Time module provides some specifications that were neglected in the manual for the MC9S12DP version, it is provided here. Input voltages between 1. From the LED datasheet we note that its forward voltage at a current of 10 mA is specified to be 2. What should the resistor value be?
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Mezilkree This page is about: As the user manual for its Enhanced Capture Time module provides some specifications that were neglected in the manual for the MC9S12DP version, it is provided here.
Input voltages between 1. From the LED datasheet we note that its forward voltage at a current of 10 mA is specified to be 2. What should the resistor value be? The actual threshold values and degree of hysteresis will vary from pin to pin. The specified maximum instantaneous current is 25 mA into or out of any one pin at a time.
These digital output pins are very useful because they can directly drive a wide range of devices. Using this bundle, educators have an integrated platform to teach the design and test of microcontroller systems.
Limit injected current if excessive voltages can be present. Consult on how to use NI products Overcome development challenges Quickly resolve issues pre- or post-deployment To access NI technical support services for your hardware, visit ni.
Pre-coded C-language routines make it easy to access these features. View Pricing and Purchasing Information. Beware however that it is not always clear which specifications are shared by the two versions, and which apply only to the X-version of the processor. Negative going noise on the input voltage will not cause a false transition back to a logic 0 unless it is greater than 0.
When the input voltage rises from a logic 0 toward a logic 1 level, the logic 1 is recognized when the voltage rises to 2. Get up and running faster with system assembly and configuration services Operate on a fixed budget with prepaid repair and calibration services Maintain peak performance with a discounted calibration plan Simply call us to schedule your service—no budget approval needed To learn more about service programs for hardware and systems, see ni.
Protecting the 9S12 input and output pins. Index to all documents, tutorials, and user guides. The hysteretic input works together with any source impedance driving the pin to provide some immunity against noise and to debounce the input signal. Connecting Hardware to the 9S12 Processor. The following graphs show that the resistance of an output pin in either the high or low state is approximately 40 ohms for currents to the maximum of 25 mA.
Gain the skills you need to design and develop high-quality applications:. Freescale HCS12 Add-on Board — National Instruments Load circuitry that requires significant current to be sourced or sunk by the digital output should include external resistors to ensure that the absolute maximum rating of 25 mA per output pin is never exceeded. Service Programs for Hardware At NI, we produce high-performance dattasheet and are committed to helping you maintain that performance for years to come.
Prototyping and feasibility analysis Startup, consulting, and development assistance System integration Migration and upgrade assistance For more information on NI professional services and the Alliance Partner Network, see ni. At greater output currents the resistance increases gradually, but the 40 ohm approximation holds good up through the 25 datahseet maximum. See All Countries and Regions. The following graphs show that in reduced drive mode the resistance of an output pin is approximately ohms in either the high or low state.
NI and the extensive network of NI Alliance Partners provide a wide range of professional services so that together, we can assist you with the design, development, and deployment of even the most complex systems. Mosaic Industries web site. The resistor limits the current into the LED. Nevertheless, any circuitry connected to the processor should take care to:. Device Overview and Block Diagram. Likewise, during a logic 1 to logic 0 transition, the input is protected against positive going noise spikes of less than 0.
Pin currents must be limited using external resistors. Through our standard NI technical support program, we can help you:. The following graphs illustrate the variation. For some applications, particularly when driving inductive loads such as relays, you may need to provide Schottky diode clamps between the pin and V DD and between the pin and ground.
Freescale HCS12 9S12 Datasheets Our three- or five-year service programs for hardware and systems provide the coverage you need while ensuring lowest total cost of ownership over the life of your system:. Even so, as a service to those looking for descriptions of the protocol, the datasheets are provided here: That is, for currents of less than 10 mA the voltage change is linear with current; it can be modeled as a voltage source of either zero or five volts and an equivalent series resistance of 40 ohms 1.
Most datasheets listed on this page may be downloaded as a single 6. The detailed specifications provide the timing information you may sometimes need when writing c language application programs. The consequence of this hysteresis is that the threshold between a logic high and a logic low depends on whether the input voltage is rising or falling.
Overview of the MC9S12A microcontroller. Overview Pricing Services Resources This Freescale HCS12 Microcontroller Experimenter has been designed specifically for teaching microcontroller theory in electrical and computer engineering curricula. Our three- or five-year service programs for hardware and systems provide the coverage you need while ensuring lowest total cost of ownership over the life of your system: Learn recommended techniques to reduce development time and improve application performance and scalability Leverage more than 40 training courses taught by NI and industry experts Attend training in a variety of formats, including online, virtual, and classroom settings To find training courses for your hardware, visit ni.
HCS12 DATASHEET PDF
Observe the 8 port B LED indicators. If you ordered the board with serial monitor firmware for the CodeWarrior, it would be pre-installed with the serial monitor and a factory test program. The right DIP switch is not used by the serial monitor. If the left switch is placed in the "RUN" mode in the "up" position the 8 port B LED indicators will flash again from left to right to indicate that the program execution is diverted to the user code.
Understanding and Implementing the HC-12 Wireless Transceiver Module
The transceivers must be physically separated by at least 1. This program will allow messages to be sent between two computers via the HC transmitters. Text typed on one computer will be displayed on the serial monitor of the second computer. Per the datasheet, if powering the HC with more than 4. The Arduino UART has a byte receive buffer built into the hardware so any bytes of data that exceed the byte limit will be discarded. The software serial also has a byte buffer; however, the SoftwareSerial library can be modified to increase that, if required. Hughes for AllAboutCircuits.