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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Gain the skills you need to design and develop high-quality applications: Device Overview and Block Diagram.

HCS12 Datasheet(PDF) – Freescale Semiconductor, Inc

We calculate it as, Eqn. What should the resistor value be?

Negative going noise on the input voltage will not cause a false transition back to a logic 0 unless it is greater than 0. The resistor limits the current into the LED. The following graphs illustrate the variation. Likewise, during a logic 1 to logic 0 transition, the input is protected against positive dataheet noise spikes of less than 0.

Pins on the HCS12 configured as digital inputs are guaranteed to report a logical high if the input voltage is greater than 0. The consequence of this hysteresis is that the threshold between a logic high and a logic low depends on whether the input voltage is daatasheet or falling. But please be careful — whenever these outputs are connected to external devices you must stay within the voltage and current capabilities of the output pins. From the LED datasheet we note that its forward voltage at a current of 10 mA datxsheet specified to be 2.

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 maximum current you should ever source from the pin is 25 ma. The specified maximum instantaneous current is 25 mA into or out of any one pin at a time.


Index to all documents, tutorials, and user guides. This page is about: Connecting Hardware to the 9S12 Processor. Consult on how to use NI products Overcome development hccs12 Quickly resolve issues pre- datsaheet post-deployment To access NI technical support services for your hardware, visit ni.

Freescale HCS12 9S12 Datasheets

The detailed specifications provide the timing information you may sometimes need when writing c language application programs.

Using this Doc Web. Learn more about our privacy policy. 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.

HCS12 Datasheet(PDF) – Motorola, Inc

The actual threshold values and degree of hysteresis will vary from pin to pin. 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.

The following diagram shows the measured threshold for a single pin. Full drive mode is recommended for most applications. Even so, as a service to those looking for descriptions of the protocol, the datasheets are provided here: Prevent excessive voltage levels at the pin; and. 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.

The maximum current you should ever sink with the pin is 25 ma.

At Datasheey, we produce high-performance hardware and are committed to helping you maintain that performance for years to come. Overview of the MC9S12A microcontroller. See All Countries and Regions. 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.

Input pin logic levels and threshold voltages.


Digital I/O – Hardware Interfacing

Protecting the 9S12 input and output pins. They will always report a logical low if the input voltage is less than 0. If there is the possibility of the output pin being driven to a negative voltage level it is better to prevent excessive power dissipation dahasheet the processor package by externally datxsheet the voltage to ground V SS with a Schottky diode.

The Module Mapping Control Guide shows you how to use the control registers for the HCS12 Microcontroller and how to configure the device’s memory map. Using this datashest, educators have an integrated platform to teach the design and test of microcontroller systems. To find training courses for your hardware, visit ni.

You may either source current to the LED, or sink current from it, as shown in the following circuit. Mosaic Industries web site. With extensive training options for new and experienced users, we can help you reduce development time and costs through faster datasheeet and increased productivity with your NI hardware and systems. 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.

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: View Pricing and Purchasing Information. Pin currents must be limited using external resistors. Hfs12 following graphs show that in reduced drive mode the resistance of an output pin is approximately ohms in either the high or low state.