MCF5271 查看數據表（PDF） - Freescale Semiconductor

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MCF5271

MCF5271 Integrated Microprocessor Hardware Specification

Freescale Semiconductor 

Features

— 24 to 50 MHz oscillator reference frequency for 1:1 mode

— Separate clock output pin

— Interrupt Controllers (x2)

– Support for up to 41 interrupt sources organized as follows: 34 fully-programmable

interrupt sources and 7 fixed-level external interrupt sources

— Unique vector number for each interrupt source

— Ability to mask any individual interrupt source or all interrupt sources (global mask-all)

— Support for hardware and software interrupt acknowledge (IACK) cycles

— Combinatorial path to provide wake-up from low power modes

• DMA Controller

— Four fully programmable channels

— Dual-address and single-address transfer support with 8-, 16- and 32-bit data capability along

with support for 16-byte (4 x 32-bit) burst transfers

— Source/destination address pointers that can increment or remain constant

— 24-bit byte transfer counter per channel

— Auto-alignment transfers supported for efficient block movement

— Bursting and cycle steal support

— Software-programmable connections between the 12 DMA requesters in the UARTs (3),

32-bit timers (4), plus external logic (4), and the four DMA channels (4)

• External Bus Interface

— Glueless connections to external memory devices (e.g., SRAM, Flash, ROM, etc.)

— SDRAM controller supports 8-, 16-, and 32-bit wide memory devices

— Support for n-1-1-1 burst fetches from page mode Flash

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

— Programmable wait state generator

— 32-bit bidirectional data bus

— 24-bit address bus

— Up to eight chip selects available

— Byte/write enables (byte strobes)

— Ability to boot from external memories that are 8, 16, or 32 bits wide

• Chip Configuration Module (CCM)

— System configuration during reset

— Selects one of four clock modes

— Sets boot device and its data port width

— Configures output pad drive strength

— Unique part identification number and part revision number

MCF5271 Integrated Microprocessor Hardware Specification, Rev. 1.2

6

Freescale Semiconductor

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