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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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.
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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.
HCS12 Datasheet(PDF) – Freescale Semiconductor, Inc
The following diagram shows the measured threshold for a single pin. 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: To learn more about service programs for hardware and systems, see ni.
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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. Prevent excessive voltage levels at the pin; and. The actual threshold values and degree of hysteresis will vary from hfs12 to pin.
At greater output currents the resistance increases gradually, but the 40 ohm approximation holds good up through the 25 mA maximum. Even so, as a service to bcs12 looking for descriptions of the protocol, the datasheets are provided here: Input voltages between 1.
However, you should not rely on the internal diodes to prevent damage from excessive voltage. Beware however that it is not chs12 clear which specifications are shared by the two versions, and which apply only to the X-version of the processor.
Digital I/O – Hardware Interfacing
You may either source current to the LED, or sink current from it, as shown in the following circuit.
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. The specified maximum instantaneous current is 25 mA into or out of any one pin at a time. This page is about: Pre-coded C-language routines make it easy to access these features. These following Freescale datasheets are provided to supplement the documentation on this website.
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NI and the extensive network of NI Alliance Partners provide a wide range of professional services so that together, we hcss12 assist you with the design, development, and deployment of even the most complex systems. 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.
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Likewise, during a logic 1 to logic 0 transition, the input is protected against positive going noise spikes of less than 0. You can use them to directly drive LEDs, relays, transistors, opto-isolators datsheet other digital logic devices.
Protecting the 9S12 input and output pins.