DSP56321 datasheet(3/84 Pages) FREESCALE

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DSP56321 Technical Data, Rev. 11

Freescale Semiconductor

iii

Features

Table 1 lists the features of the DSP56321 device.

Table 1. DSP56321 Features

Feature

Description

High-Performance

DSP56300 Core

• 275 million multiply-accumulates per second (MMACS) (550 MMACS using the EFCOP in filtering

applications) with a 275 MHz clock at 1.6 V core and 3.3 V I/O

• Object code compatible with the DSP56000 core with highly parallel instruction set

• Data arithmetic logic unit (Data ALU) with fully pipelined 24

× 24-bit parallel Multiplier-Accumulator (MAC),

56-bit parallel barrel shifter (fast shift and normalization; bit stream generation and parsing), conditional

ALU instructions, and 24-bit or 16-bit arithmetic support under software control

• Program control unit (PCU) with position independent code (PIC) support, addressing modes optimized for

DSP applications (including immediate offsets), internal instruction cache controller, internal memory-

expandable hardware stack, nested hardware DO loops, and fast auto-return interrupts

• Direct memory access (DMA) with six DMA channels supporting internal and external accesses; one-, two-

, and three-dimensional transfers (including circular buffering); end-of-block-transfer interrupts; and

triggering from interrupt lines and all peripherals

• Phase-lock loop (PLL) allows change of low-power divide factor (DF) without loss of lock and output clock

with skew elimination

• Hardware debugging support including on-chip emulation (OnCE) module, Joint Test Action Group (JTAG)

test access port (TAP)

Enhanced Filter

Coprocessor (EFCOP)

• Internal 24

× 24-bit filtering and echo-cancellation coprocessor that runs in parallel to the DSP core

• Operation at the same frequency as the core (up to 275 MHz)

• Support for a variety of filter modes, some of which are optimized for cellular base station applications:

• Real finite impulse response (FIR) with real taps

• Complex FIR with complex taps

• Complex FIR generating pure real or pure imaginary outputs alternately

• A 4-bit decimation factor in FIR filters, thus providing a decimation ratio up to 16

• Direct form 1 (DFI) Infinite Impulse Response (IIR) filter

• Direct form 2 (DFII) IIR filter

• Four scaling factors (1, 4, 8, 16) for IIR output

• Adaptive FIR filter with true least mean square (LMS) coefficient updates

• Adaptive FIR filter with delayed LMS coefficient updates

Internal Peripherals

• Enhanced 8-bit parallel host interface (HI08) supports a variety of buses (for example, ISA) and provides

glueless connection to a number of industry-standard microcomputers, microprocessors, and DSPs

• Two enhanced synchronous serial interfaces (ESSI), each with one receiver and three transmitters (allows

six-channel home theater)

• Serial communications interface (SCI) with baud rate generator

• Triple timer module

• Up to 34 programmable general-purpose input/output (GPIO) pins, depending on which peripherals are

enabled

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