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DSP56824 Features

Digital Signal Processing Core

? Efficient 16-bit DSP56800 family DSP engine

? As many as 35 Million Instructions Per Second (MIPS) at 70 MHz

? Single-cycle 16 × 16-bit parallel Multiplier-Accumulator (MAC)

? Two 36-bit accumulators including extension bits

? 16-bit bidirectional barrel shifter

? Parallel instruction set with unique DSP addressing modes

? Hardware DO and REP loops

? Three internal address buses and one external address bus

? Four internal data buses and one external data bus

? Instruction set supports both DSP and controller functions

? Controller style addressing modes and instructions for compact code

? Efficient C Compiler and local variable support

? Software subroutine and interrupt stack with unlimited depth

Memory

? On-chip Harvard architecture permits as many as three simultaneous accesses to program and data

memory

? On-chip memory

— 32 K × 16 Program ROM

— 128 × 16 Program RAM

— 3.5 K × 16 X RAM usable for both data and programs

— 2 K × 16 X data ROM

? Off-chip memory expansion capabilities

— As much as 64 K × 16 X data memory

— As much as 64 K × 16 program memory

— External memory expansion port programmable for 1 to 15 wait states

? Programs can run out of X data RAM

Peripheral Circuits

? External Memory Interface (Port A)

? Sixteen dedicated GPIO pins (eight pins programmable as interrupts)

? Serial Peripheral Interface (SPI) support: Two configurable four-pin ports (SPI0 and SPI1) (or eight

additional GPIO lines)

— Supports LCD drivers, A/D subsystems, and MCU systems

— Supports inter-processor communications in a multiple master system

— Supports demand-driven master or slave devices with high data rates

? Synchronous Serial Interface (SSI) support: One 6-pin port (or six additional GPIO lines)

— Supports serial devices with one or more industry-standard codecs, other DSPs,

microprocessors, and Freescale SPI-compliant peripherals

— Allows implementing synchronous or synchronous transmit and receive sections with separate

or shared internal/external clocks and frame syncs

— Supports Network mode using frame sync and as many as 32 time slots

— Can be configured for 8-bit, 10-bit, 12-bit, and 16-bit data word lengths

? Three programmable 16-bit timers (accessed using two I/O pins that can also be programmed as two

additional GPIO lines)

? Computer-Operating Properly (COP) and Real-Time Interrupt (RTI) timers

? Two external interrupt/mode control pins

? One external reset pin for hardware reset

? JTAG/On-Chip Emulation (OnCE?) 5-pin port for unobtrusive, processor speed-independent

debugging

? Extended debug capability with second breakpoint and 8-level OnCE FIFO history buffer

? Software-programmable, Phase Lock Loop-based (PLL-based) frequency synthesizer for the DSP

core clock

Energy Efficient Design

? A single 2.7–3.6 V power supply

? Power-saving Wait and multiple Stop modes available

? Fully static, HCMOS design for 70 MHz to dc operating frequencies

? Available in plastic 100-pin Thin Quad Flat Pack (TQFP) surface-mount package