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If the interrupt line is held low, the MCU will recognize another interrupt as soon as dtasheet interrupt mask bit in the MCU is cleared normally upon return from an interrupt. The BKGD pin receives and transmits serial background debugging.
Microprocessor Applications: Software and Documentation
This page is about: The pull-up can be turned off by clearing. This pin is always an input and can always be read. Using this Doc Web. Because the XIRQ input is level sensitive, it can be connected. The BKGD pin has an. The detailed specifications provide the timing information you may sometimes need when writing c language application programs. Pre-coded C-language routines make it easy datasheey access these features.
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. This pin is always an input and.
68HC12 Datasheet, PDF – Alldatasheet
Index to all documents, tutorials, and user guides. Home – IC Supply – Link. Most datasheets listed on this page may be downloaded as a single 6. MODB have active pull-downs during reset. 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.
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 source must drive the interrupt input with an open-drain type of driver to avoid contention between outputs.
These following Freescale datasheets are provided to supplement the documentation on this website.
The state of these pins during reset determine the MCU operating mode. XIRQ datashfet often used as a power loss detect. 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.
XIRQ is often used as a power loss detect interrupt. Refer to Development Support. Mosaic Industries web site. There is an active pull-up on this pin while in reset and immediately out of reset.
Freescale HCS12 9S12 Datasheets
Even so, as a service to those looking for descriptions fatasheet the protocol, the datasheets are provided here: Overview of the MC9S12A microcontroller. This manual describes the features and operation of the core central processing unit, or CPU, and development support functions used in all HCS12 microcontrollers.
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. Connecting Hardware to the 9S12 Processor. MCU will recognize another interrupt as soon as the interrupt mask bit in.
For a brief introduction to the vatasheet used, see the following:. If the interrupt line is held low, the. A special self-timing protocol is used.
SGS Thomson Microelectronics
The XIRQ input provides a means 688hc12 requesting a nonmaskable interrupt. Device Overview and Block Diagram. There is an active pull-up on this pin while in reset.