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 supplement the documentation on this website.

The BKGD pin receives and transmits serial background debugging.

Mosaic Industries web site. There is an active pull-up on this pin while in reset.

Freescale 68HC12

A special self-timing protocol is used. Refer to Development Support.

Home – IC Supply – Link. 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 pin is always an input and can always be read.

68HC12 Hoja de datos ( Datasheet PDF ) – MC68HC12

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.

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Overview of the MC9S12A microcontroller. During reset, the X bit in the condition code. 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 vatasheet must drive the interrupt input with an open-drain type of driver to avoid contention datasehet outputs. MODB have active pull-downs during reset. Because the XIRQ input is level sensitive, it can be connected.

This pin is always an input and. Using this Doc Web. XIRQ is often used as a power loss detect interrupt. Most datasheets listed on this page may be downloaded as a single 6. MCU will recognize another interrupt as soon as the interrupt mask bit in. The pull-up can be turned off by clearing. There is an active pull-up on this pin while in reset and immediately out of reset.

The state of these pins during reset determine the MCU operating mode. The XIRQ input provides a means of requesting a nonmaskable interrupt. The detailed specifications provide dataeheet timing information you may sometimes need when writing c language application programs.

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If the interrupt line is held low, the.

SGS Thomson Microelectronics – datasheet pdf

Even so, as a service to those looking for descriptions of the protocol, the datasheets are provided here: Connecting Hardware to the 9S12 Processor. The BKGD pin has an.

Pre-coded C-language routines make it easy to access these features. This manual describes the features and operation of the core central processing unit, or CPU, and development support functions used in all HCS12 microcontrollers. This page is about: Device Overview and Block Diagram.

For a brief introduction to the microcontroller used, see the following:. Index to all documents, tutorials, and user guides. XIRQ is often used as a power loss detect.

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. If the interrupt line is held low, the MCU will recognize another interrupt as soon as the interrupt mask bit in datsaheet MCU is cleared normally upon return from an interrupt.