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56854: Description16-bit digital signal controllers; File Size828KB，60 Pages; ManufacturerFREESCALE (NXP)

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56854 Overview

16-bit digital signal controllers

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56854

Data Sheet

Technical Data

56800E

16-bit Digital Signal Controllers

DSP56854

Rev. 6

01/2007

freescale.com

56854 Description

•

JTAG/Enhanced On-Chip Emulation (EOnCE) for unobtrusive, real-time debugging

Six (6) independent channels of DMA

8-bit Parallel Host Interface*

Time of Day

Up to 41 GPIO

* Each peripheral I/O can be used alternately as a General Purpose I/O if not needed

1.1.4

•

Energy Information

Fabricated in high-density CMOS with 3.3V, TTL-compatible digital inputs

Wait and Stop modes available

1.2 56854 Description

The 56854 is a member of the 56800E core-based family of controllers. It combines, on a single chip, the

processing power of a Digital Signal Processor (DSP) and the functionality of a microcontroller with a

flexible set of peripherals to create an extremely cost-effective solution. Because of its low cost,

configuration flexibility, and compact program code, the 56854 is well-suited for many applications. The

56854 includes many peripherals that are especially useful for low-end Internet appliance applications and

low-end client applications such as telephony; portable devices; Internet audio; and point-of-sale systems,

such as noise suppression; ID tag readers; sonic/subsonic detectors; security access devices; remote

metering; sonic alarms.

The 56800E core is based on a Harvard-style architecture consisting of three execution units operating in

parallel, allowing as many as six operations per instruction cycle. The microprocessor-style programming

model and optimized instruction set allow straightforward generation of efficient, compact DSP and

control code. The instruction set is also highly efficient for C Compilers, enabling rapid development of

optimized control applications.

The 56854 supports program execution from either internal or external memories. Two data operands can

be accessed from the on-chip Data RAM per instruction cycle. The 56854 also provides two external

dedicated interrupt lines, and up to 41 General Purpose Input/Output (GPIO) lines, depending on

peripheral configuration.

The 56854 controller includes 16K words of Program RAM, 16K words of Data RAM, and 1K words of

Boot ROM. It also supports program execution from external memory.

This controller also provides a full set of standard programmable peripherals that include an 8-bit parallel

Host Interface, Enhanced Synchronous Serial Interface (ESSI), one Serial Peripheral Interface (SPI), two

Serial Communications Interfaces (SCIs), and a Quad Timer. The Host Interface, ESSI, SPI, SCI, four chip

selects and quad timer can be used as General Purpose Input/Outputs (GPIOs) if its primary function is not

required.

56854 Technical Data, Rev. 6

Freescale Semiconductor

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