MCF5216CVM66                 Description

The processor core is comprised of two separate pipelines that are decoupled by an instruction buffer. The two-stage instruction fetch pipeline (IFP) is responsible for instruction-address generation and instruction fetch. The instruction buffer is a first-in-first-out (FIFO) buffer that holds prefetched instructions awaiting execution in the operand execution pipeline (OEP). The OEP includes two pipeline stages. The first stage decodes instructions and selects operands (DSOC); the second stage (AGEX) performs instruction execution and calculates operand effective addresses, if needed. The V2 core implements the ColdFire instruction set architecture revision A with added support for a separate user stack pointer register and four new instructions to assist in bit processing. Additionally, the MCF5282 core includes the enhanced multiply-accumulate unit (EMAC) for improved signal processing capabilities. The EMAC implements a 4-stage execution pipeline, optimized for 32 x 32 bit operations, with support for four 48-bit accumulators. Supported operands include 16- and 32-bit signed and unsigned integers, signed fractional operands, and a complete set of instructions to process these data types. The EMAC provides superb support for execution of DSP operations within the context of a single processor at a minimal hardware cost.

MCF5216CVM66                  Features

A block diagram of the MCF528x and MCF521x is shown in Figure 1-1. The main features are as follows:

? Static Version 2 ColdFire variable-length RISC processor

— Static operation

— On-chip 32-bit address and data path

— Processor core and bus frequency up to 80 MHz

— Sixteen general-purpose 32-bit data and address registers

— ColdFire ISA_A with extensions to support the user stack pointer register, and four new

instructions for improved bit processing

— Enhanced Multiply-Accumulate (EMAC) unit with four 48-bit accumulators to support 32-bit

signal processing algorithms

— Illegal instruction decode that allows for 68K emulation support

? System debug support

— Real-time trace for determining dynamic execution path

— Background debug mode (BDM) for in-circuit debugging

— Real time debug support, with one user-visible hardware breakpoint register (PC and address

with optional data) that can be configured into a 1- or 2-level trigger

? On-chip memories

— 2-Kbyte cache, configurable as instruction-only, data-only, or split I-/D-cache

— 64-Kbyte dual-ported SRAM on CPU internal bus, accessible by core and non-core bus masters

(e.g., DMA, FEC) with standby power supply support

— 512 Kbytes of interleaved Flash memory supporting 2-1-1-1 accesses

(256 Kbytes on the MCF5281 and MCF5214, no Flash on MCF5280)

– This product incorporates SuperFlash? technology licensed from SST.

? Power management

— Fully-static operation with processor sleep and whole chip stop modes

— Very rapid response to interrupts from the low-power sleep mode (wake-up feature)

— Clock enable/disable for each peripheral when not used

? Fast Ethernet Controller (FEC) (not available on the MCF5214 and MCF5216)

— 10BaseT capability, half- or full-duplex

— 100BaseT capability, half- or limited-throughput full-duplex

— On-chip transmit and receive FIFOs

— Built-in dedicated DMA controller

 MCF5216CVM66               Applications

? Factory automation & control

– Automated sorting equipment

– CNC control