mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 331

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Chapter 15
Interrupt Controller (INTC)
15.1 Introduction
The CF1_INTC interrupt controller (CF1_INTC) is intended for use in low-cost
microcontroller designs using the Version 1 (V1) ColdFire processor core. In keeping
with the general philosophy for devices based on this low-end 32-bit processor, the
interrupt controller generally supports less programmability compared to similar modules
in other ColdFire microcontrollers and embedded microprocessors. However, CF1_INTC
provides the required functionality with a minimal silicon cost.
These requirements guide the CF1_INTC module definition to support Freescale's
Controller Continuum:
The following table provides a high-level architectural comparison between HCS08 and
ColdFire exception processing as these differences are important in the definition of the
CF1_INTC module. Throughout this document, the term IRQ refers to an interrupt
request and ISR refers to an interrupt service routine to process an interrupt exception.
Freescale Semiconductor, Inc.
Exception Vector Table
Attribute
• The priorities of the interrupt requests between comparable HCS08 and V1 ColdFire
• Supports a mode of operation (through software convention with hardware assists)
• Leverages the current ColdFire interrupt controller programming model and
devices are identical.
equivalent to the S08's interrupt processing with only one level of nesting.
functionality, but with a minimal hardware implementation and cost.
Table 15-1. Exception Processing Comparison
MCF51JF128 Reference Manual, Rev. 2, 03/2011
32 two-byte entries, fixed location at upper
end of memory
HCS08
Table continues on the next page...
Preliminary
115 four-byte entries, located at lower end
of memory at reset, relocatable with the
VBR
V1 ColdFire
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