68HC12 DATASHEET PDF

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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. These following Freescale datasheets are provided to datashwet the documentation on this website.

Home – IC Supply – Link. If the interrupt line is held low, the.

SGS Thomson Microelectronics – datasheet pdf

MODB have active pull-downs during reset. During reset, the X bit in the condition code. The pull-up can be turned off by clearing.

The BKGD pin receives and transmits serial background debugging. MCU will recognize another interrupt as soon as the interrupt mask bit in. This datasbeet describes the features and operation of the core central processing unit, or CPU, and development support functions used in all HCS12 microcontrollers.

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Refer to Development Support.

Freescale HCS12 9S12 Datasheets

Most datasheets listed on this page may be downloaded as a single 6. XIRQ is often used as a power loss detect interrupt. Device Overview and Block Diagram. Mosaic Industries web site. This pin is always an input and.

There must also be an interlock mechanism at each interrupt source so that the source holds the interrupt line low until the MCU recognizes and acknowledges the interrupt request. This pin is always an input and can always be read. Whenever XIRQ or IRQ are used with multiple interrupt sources IRQ must be configured for level-sensitive operation if there is more than one source of IRQ interrupteach source must drive the interrupt input with an open-drain type of driver to avoid contention between outputs.

There is an active pull-up on this pin while in reset and immediately out of reset. Even so, as a service to those looking for descriptions of the protocol, the datasheets are provided here: If the interrupt line is held low, the MCU will recognize another interrupt as soon as the interrupt mask bit in the MCU is cleared normally upon return from an interrupt.

Index to all documents, tutorials, and user guides. The detailed specifications provide the timing information you may sometimes need when writing c language application programs.

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Using this Doc Web. 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.

Overview of the MC9S12A microcontroller. Because the XIRQ input is level sensitive, it can be connected. For a brief introduction to the microcontroller used, see the following:. There is an active pull-up on this pin while in reset.

The XIRQ input provides a means of requesting a nonmaskable interrupt. A special self-timing protocol is used. Connecting Hardware to the 9S12 Processor. Pre-coded C-language routines make it easy to access these features.

This page is about: The BKGD pin has an. 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. The state of these pins during reset determine the MCU operating mode. XIRQ is often used as a power loss detect.