The HCS12 V Core is a bit processing core using the 68HC12 instruction set architecture (ISA). This makes the Core instruction set. Product Features. ○ Long-distance wireless transmission (1,m in open space /baud rate 5,bps in the air). ○ Working frequency range (MHz. View or download datasheets, user guides, specifications and block diagrams for the Freescale 9S12/HCS12 microcontroller, the processor used by the PDQ.
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The actual threshold values and degree of hysteresis will vary from pin to pin. We calculate it as, Eqn. The trigger voltage can lie anywhere within the 1. The hysteretic input works together with any source impedance driving the pin to provide some immunity against noise and to debounce the input signal.
Datasheey please be careful — whenever these hc12 are connected to external devices you must stay within the voltage and current capabilities of the output pins. 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:.
Freescale HCS12 9S12 Datasheets
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. The following diagram shows the measured threshold for a single pin. 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.
You can use them to directly drive LEDs, relays, transistors, opto-isolators or other digital logic devices. The resistor limits the current into the LED. 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.
Excessive voltages are prevented by ensuring that voltages of less than a diode drop below V SS that is, Using this bundle, dstasheet have an integrated platform to teach the design and test of microcontroller systems. What should the resistor value be? Mosaic Industries web site. Input pin logic levels and threshold voltages. 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.
No action is required to obtain full drive, as this is the default condition after a reset. You may either source current to the LED, or sink current from it, as shown in the following circuit. 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. Overview of the MC9S12A microcontroller. In the low state, full-drive digital outputs can keep the voltage below 0.
For a brief introduction to the microcontroller used, see the following:. Dafasheet following graphs hca12 the variation.
From the LED datasheet we note that its forward voltage at a current of 10 mA is specified to be 2. To access NI technical support services for your hardware, visit ni.
The maximum current you should ever source from the pin is 25 ma. The maximum current you should ever sink with the pin is 25 ma.
If there is the possibility of the output pin being driven to a negative voltage level it is better to prevent excessive power dissipation in the processor package by externally clamping the voltage to ground V SS with a Schottky diode. They will always report a logical low if the input voltage is less than 0.
Full drive mode is recommended for most applications. Device Overview and Block Diagram. 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.
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. 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.
Pin currents must be limited using external resistors.
At greater output currents the resistance increases gradually, but the 40 ohm approximation holds datashset up through the 25 mA maximum. The detailed specifications provide the timing information you may sometimes need when writing c language application programs.
HCS12 Datasheet(PDF) – Motorola, Inc
datasheef This page is about: Index to all documents, tutorials, and user guides. Most datasheets listed on this page may be downloaded as a single 6.
This manual describes the features and operation of the hhcs12 central processing unit, or CPU, and development support functions used in all HCS12 microcontrollers.
Negative going noise on the input voltage will not cause a false transition back to a logic 0 unless it is greater than 0. 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.
Using this Doc Web. 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.
Freescale HCS12 Add-on Board – National Instruments
Using this Doc Web. These following Freescale datasheets are provided to supplement the documentation on this website.
Index to all documents, tutorials, and user guides.