Overview

This chapter provides an overview of the MCF5272 microprocessor features, including the major functional components.

MCF5272 Key Features

A block diagram of the MCF5272 is shown in Figure 1-1. The main features are as follows:

• Static Version 2 ColdFire variable-length RISC processor

— 32-bit address and data path on-chip

— 66-MHz processor core and bus frequency

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

— Multiply-accumulate unit (MAC) for DSP and fast multiply operations

• On-chip memories

— 4-Kbyte SRAM on CPU internal bus

— 16-Kbyte ROM on CPU internal bus

— 1-Kbyte instruction cache

• 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

— Software-controlled disable of external clock input for virtually zero power consumption (low-power stop mode)

• Two universal asynchronous/synchronous receiver transmitters (UARTs)

— Full-duplex operation

— Based on MC68681 dual-UART (DUART) programming model

— Flexible baud rate generator

— Modem control signals available (CTS and RTS)

— Processor interrupt and wakeup capability

— Enhanced Tx, Rx FIFOs, 24 bytes each

• Ethernet Module

— 10 baseT capability, half or full duplex

— 100 baseT capability, half duplex and limited throughput full duplex (MCF5272)

— On-chip transmit and receive FIFOs

— Off-chip flexible buffer descriptor rings

— Media-independent interface (MII)

• Universal serial bus (USB) module

— 12 Mbps (full speed)

— Fully compatible with USB 1.1 specifications

— Eight endpoints (control, bulk, interrupt Rx, isochronous)

— Endpoint FIFOs

— Selectable on-chip analog interface

• External memory interface

— External glueless 8, 16, and 32-bit SRAM and ROM interface bus

— SDRAM controller supports 16–256 Mbit devices

— External bus configurable for 16 or 32 bits width for SDRAM

— Glueless interface to SRAM devices with or without byte strobe inputs

— Programmable wait state generator

• Queued serial peripheral interface (QSPI)

— Full-duplex, three-wire synchronous transfer

— Up to four chip selects available

— Master operation

— Programmable master bit rates

— Up to 16 preprogrammed transfers

• Timer module

— 4x16-bit general-purpose multi-mode timer

– Input capture and output compare pins for timers 1 and 2

– Programmable prescaler

— 15-nS resolution at 66-MHz clock frequency

— Software watchdog timer

— Software watchdog can generate interrupt before reset

— Processor interrupt for each timer

• Pulse-width modulation (PWM) unit

— Three identical channels

— Independent prescaler TAP point

— Period/duty range variable

• System integration module (SIM)

— System configuration including internal and external address mapping

— System protection by hardware watchdog

— Versatile programmable chip-select signals with wait-state generation logic

— Up to three 16-bit parallel input/output ports

— Latchable interrupt inputs with programmable priority and edge triggering

— Programmable interrupt vectors for on-chip peripherals

• Physical layer interface controller (PLIC)

— Allows connection using general circuit interface (GCI) or interchip digital link (IDL) physical layer protocols for 2B + D data

— Three physical interfaces

— Four time-division multiplex (TDM) ports

• IEEE 1149.1 boundary-scan test access port (JTAG) for board-level testing

• Operating voltage: 3.3 V ±0.3 V

• Operating temperature: 0 –70°C

• Operating frequency: DC to 66 MHz, from external CMOS oscillator

• Compact ultra low-profile 196 ball-molded plastic ball-grid array package (PGBA)