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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Index to all documents, tutorials, and user guides. NI and the extensive network of NI Alliance Partners provide a wide range of professional services so that together, we can assist you hcs1 the design, development, and deployment of even the most complex systems.

Pin currents must be limited using external resistors. Overview Pricing Services Resources This Freescale HCS12 Microcontroller Experimenter has been designed specifically for teaching microcontroller theory in electrical and computer engineering curricula.

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. Using this bundle, educators have an integrated platform to teach the design and test of microcontroller systems.

Digital I/O – Hardware Interfacing

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. This site uses cookies to offer you a better browsing experience. Beware however that it is not always clear which specifications are hsc12 by the two versions, and which apply only to the X-version of the processor. The hysteretic input works together with any source impedance driving the pin to provide some immunity against noise and to debounce the input signal.

We calculate it as.

HCS12 Datasheet(PDF) – Freescale Semiconductor, Inc

To find training courses for your hardware, visit ni. Device Overview and Block Diagram. 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. 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.


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

You may either source current to the LED, or sink current from it, as shown in the following circuit. Prevent excessive voltage levels at the pin; and. This manual describes the features and operation of the core central processing unit, or CPU, and development support functions used in all HCS12 microcontrollers.

Nevertheless, any circuitry connected to the processor should take care to:. At greater output currents the resistance increases gradually, but the 40 ohm approximation holds good up through the 25 mA maximum.

Learn more about our privacy policy. Input voltages between 1. 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 trigger voltage can lie anywhere within the 1. Service Programs for Hardware At NI, we produce high-performance hardware and are committed to helping you dataseet that performance for years to come.

They consist of internal diodes that conduct current from the input pin to the supply or ground rails in the event that the input pin voltage exceeds the supply range. Full drive mode is recommended for most applications. To access NI technical support services for your hardware, visit ni.

Excessive voltages are prevented by ensuring that voltages of less than a diode drop below V SS that is, 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.

Pins on the HCS12 configured as digital inputs are guaranteed to report a logical high if the input voltage is greater than 0.

To learn more about service programs for hardware and systems, see ni.

  AR 40-562 PDF

HCS12 Datasheets

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.

The specified maximum instantaneous current is 25 mA into or out of any one pin at a time. Through our standard NI technical support program, we can help you:. No action is datashdet to obtain full drive, as this is the default condition after a reset. Index to all documents, tutorials, and user guides. The resistor limits the current into the LED. 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.

However, you should not rely on the internal diodes to prevent damage from excessive voltage. Even so, as a service to those hcs21 for descriptions of the protocol, the datasheets are provided here: 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:.

From the LED datasheet we note that its forward voltage at a current of 10 mA is specified to be 2. They will always report a logical low if the input voltage is less than 0.

The maximum current you should ever source from the pin is 25 ma. Pre-coded C-language routines make it easy to access these features. 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 following graphs illustrate the variation.