Dsp56012 Features; Table 1-1 High True / Low True Signal Conventions - Motorola DSP56012 User Manual

Overview

DSP56012 Features

Table 1-1 High True / Low True Signal Conventions

Signal/Symbol
1
PIN
1
PIN
1
PIN
1
PIN
Notes: 1. PIN is a generic term for any pin on the device.
2. Ground is an acceptable low voltage level. See the appropriate data sheet for the range
of acceptable low voltage levels (typically a TTL logic low).
3. V is an acceptable high voltage level. See the appropriate data sheet for the range of
CC
acceptable high voltage levels (typically a TTL logic high).
1.2

DSP56012 FEATURES

• Digital Signal Processing Core
– Efficient, object-code compatible, 24-bit DSP56000 family DSP engine
– 40.5 Million Instructions Per Second (MIPS)—24.69 ns instruction cycle at
81 MHz
– Highly parallel instruction set with unique DSP addressing modes
– Two 56-bit accumulators including extension byte
– Parallel 24 24-bit multiply-accumulate in 1 instruction cycle (2 clock
cycles)
– Double precision 48 48-bit multiply with 96-bit result in 6 instruction
cycles
– 56-bit addition/subtraction in 1 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)
1-6
Logic State
True
False
True
False
DSP56012 User's Manual
Signal State
Asserted
Deasserted
Asserted
Deasserted
MOTOROLA
Voltage
3
V
CC
2
Ground
2
Ground
3
V
CC