发信人: champaign (原野), 信区: ECE
标 题: Motorola公司的DSP
发信站: 哈工大紫丁香 (Sat Oct 30 10:14:32 1999), 转信
发信人: xozhao (XO), 信区: DSP
标 题: 谈谈其他DSP(2) Motorola
发信站: 饮水思源站 (Sat Jun 19 12:57:51 1999) , 转信
DSP56009
应用: suitable for digital audio decompression functions, such as Dolby AC-3; Surround, MPEG1 Layer 2, and Digital Theater Systems (DTS),
特征:
Digital Signal Processing Core
- 40MIPS; 25 ns instruction cycle at 80 MHz
- Two 56-bit accumulators including extension byte
- Parallel 24 x 24-bit multiply-accumulate in 1 instruction
cycle (2 clock cycles)
- Double precision 48 x 48-bit multiply with 96-bit result in 6 instruction cycles
- 56-bit addition/subtraction in one instruction cycle
- Fractional and integer arithmetic with support for multi-precision arithmetic
- Hardware support for block-floating point Fast Fourier Transforms (FFT)
- Hardware nested DO loops
- Zero-overhead fast interrupts (2 instruction cycles)
- PLL-based clocking with a wide range of frequency multiplications (1 to 4096) and power saving clock divider
- Four 24-bit internal data buses and three 16-bit internal address buses for simultaneous accesses to one program and two data memories
Memory
10240 x 24-bit on-chip Program ROM*
4608 x 24-bit on-chip X-data RAM and 3072 x 24-bit on-chip X-data ROM*
4352 x 24-bit on-chip Y-data RAM and 1792 x 24-bit on-chip Y-data ROM*
512 x 24-bit on-chip Program RAM and 64 x 24-bit bootstrap ROM
Up to 2304 x 24-bit from X and Y data RAM can be switched to Program RAM giving a total of 2816 x 24-bits of Program RAM
Bootstrap loading from Serial Host Interface or External Memory Interface
Peripheral and Support Circuits
---- Serial Audio Interface (SAI) includes two receivers and three transmitters, master or slave capability, and implementation of I2S, Sony, and Matshushita audio protocols;
---- two sets of SAI interrupt vectors
Serial Host Interface (SHI) features single master capability, 10-word receive FIFO, and support for 8-, 16- and 24-bit words
---- External Memory Interface (EMI), implemented as a peripheral supporting
---- Four dedicated, independent, programmable General Purpose I/O (GPIO) lines
80-pin plastic Quad Flat Pack surface-mount package; 14 x 14 x 2.45 mm; 0.65 mm lead pitch
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☆ 来源:.哈工大紫丁香 bbs.hit.edu.cn.[FROM: champaign.bbs@bbs.sj]
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