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24-BIT DIGITAL SIGNAL PROCESSOR
The Motorola DSP56307, a member of the DSP56300 family of programmable digital signal processors (DSPs), supports wireless infrastructure applications with general filtering operations.
The on-chip enhanced filter coprocessor (EFCOP) processes filter algorithms in parallel with core operation, thus increasing overall DSP performance and efficiency. Like the other family members, the DSP56307 uses a high-performance, single-clock-cycle-per-instruction engine (code-compatible with Motorolas popular DSP56000 core family), a barrel shifter, 24-bit addressing, an instruction cache, and a direct memory access controller, as in Figure 1.
The DSP56307 offers performance at 100 million instructions (MIPS) per second using an internal 100 MHz clock with a 2.5 volt core and independent 3.3 volt input/output power.
FEATURESHigh-Performance DSP56300 Core● 100 million instructions per second (MIPS) with a 100 MHz clock at 2.5 V core and 3.3 V I/O● Object code compatible with the DSP56000 core● Highly parallel instruction set● Data arithmetic logic unit (ALU) - Fully pipelined 24 x 24-bit parallel multiplier-accumulator - 56-bit parallel barrel shifter (fast shift and normalization; bit stream generation and parsing) - Conditional ALU instructions - 24-bit or 16-bit arithmetic support under software control● Program control unit (PCU) - Position independent code (PIC) support - Addressing modes optimized for DSP applications (including immediate offsets) - On-chip instruction cache controller - On-chip memory-expandable hardware stack - Nested hardware DO loops - Fast auto-return interrupts● Direct memory access (DMA) - Six DMA channels supporting internal and external accesses - One-, two-, and three- dimensional transfers (including circular buffering) - End-of-block-transfer interrupts - Triggering from interrupt lines and all peripherals● Phase-locked loop (PLL) - Allows change of low power divide factor (DF) without loss of lock - Output clock with skew elimination● Hardware debugging support - On-Chip Emulation (OnCE) module - Joint test action group (JTAG) test access port (TAP) - Address trace mode reflects internal Program RAM accesses at the external port