The computing unit(
13 in Fig. 6.3) of the F28335 DSP consists of a 32-bit CPU and a single-precision
32-bit floating-point unit(FPU), which enables the floating-point computation to be performed in hardware.
Besides, the CPU of the F28335 has a 8-stage pipeline structure, which makes the CPU be able to execute
eight instructions simultaneously in one system clock period. The 150MHz system clock is provided by an
on-chip oscillator and a phase-locked loop(PLL) circuit
11. The oscillator generates a 50MHz clock signal,
which is tripled to 150MHz by the PLL circuit. The F28335 applies the Harvard Bus Architecture, which
means that there are independent logical memory spaces and separated memory buses for the program and
the data as can be seen in Fig. 6.3. The memory bus
2 contains a program read bus, a data read bus and
a data write bus. The physical memory of the F28335 comprises of a 34K × 16 single-access random
The computing unit(13 in Fig. 6.3) of the F28335 DSP consists of a 32-bit CPU and a single-precision32-bit floating-point unit(FPU), which enables the floating-point computation to be performed in hardware.Besides, the CPU of the F28335 has a 8-stage pipeline structure, which makes the CPU be able to executeeight instructions simultaneously in one system clock period. The 150MHz system clock is provided by anon-chip oscillator and a phase-locked loop(PLL) circuit11. The oscillator generates a 50MHz clock signal,which is tripled to 150MHz by the PLL circuit. The F28335 applies the Harvard Bus Architecture, whichmeans that there are independent logical memory spaces and separated memory buses for the program andthe data as can be seen in Fig. 6.3. The memory bus2 contains a program read bus, a data read bus anda data write bus. The physical memory of the F28335 comprises of a 34K × 16 single-access random
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