This always uses hardware timer 3, which should not be used directly by application code. Motorola-Freescale-NXP processors and microcontrollers. Users can override these settings if necessary, subject to any constraints imposed by the platform HAL, but care has to be taken that the resulting configuration still matches the actual hardware. It corresponds directly to the M68K exception number. Views Read Edit View history. This is fully supported by the processor HAL.
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This uses hardware timer 2, so application code should not manipulate this timer if profiling is enabled. There is no data cache.
NXP ColdFire – Wikipedia
It should be noted that the Freescale documentation is occasionally confusing when it comes to numbering devices. Views Read Edit View history. If gprof-based profiling is in use then that will use hardware timer 2. This page was last edited on 15 Septemberat It was formerly manufactured by Freescale Semiconductor formerly the semiconductor division of Motorola which merged with NXP in In turn the pin settings are used to determine defaults for other hardware settings, for example which of the two on-chip uarts are usable.
By default it is active and enabled if the configuration contains the gprof profiling package, otherwise inactive. The relevant code uses hardware timer 2, so that timer is no longer available for application code.
coldffire Common manufacturer s NXP Semiconductors. Unloading the package should only happen as a side effect of switching target hardware. It corresponds directly to the M68K exception number. However, Fido has its own unique architecture and shares the instruction set with 68k only. Archived from the original on This controls the support for gprof-based profiling.
These options need to take into account mcf52272 processor clock speed, a characteristic of the platform rather than the processor.
MCF Datasheet pdf – MCF ColdFire Integrated Microprocessor Users Manual – Motorola
When compared to classic 68k hardware, the instruction set differs mmcf5272 in that it no longer has support for the binary-coded decimal BCD packed data format; it removes a number of other, less used instructions; and most instructions that are kept support fewer addressing modes. This always uses hardware timer 3, which should not be used directly by application code.
This is fully supported by the processor HAL. Users can override these settings if necessary, subject to any constraints imposed by the platform HAL, but care has to be taken that the resulting configuration still matches the coldfiree hardware.
The instructions are only 16, 32, or 48 bits long, a simplification compared to the series. The processor HAL provides support for the eCos system clock. Also, floating point intermediates are 64 bits and not 80 bits as in the and coprocessors.
Priority 7 corresponds to non-maskable interrupts and must be used with care: The acknowledge and configure macros are only relevant for external interrupts: Usually the processor made to sleep, halting the cpu but leaving all peripherals active. Retrieved from ” https: Timers 0 and 1 are never used by eCos so application code is free to manipulate these as required. From Wikipedia, the free encyclopedia.
Modified Motorola family. The mask and unmask operations are straightforward, simply manipulating the on-chip interrupt controller.
If the timer is required but a platform HAL provides an alternative implementation of the profiling support then this option can be disabled. The MCF has a small instruction cache of bytes.