What controls the number of instructions available per frame in the 1787 FDSP core? Is the number always 64, or will it sometimes be less than that? The datasheet says "The core is controlled with a 27-bit program word, with a maximum of 64 instructions per frame." But the datasheet does not say how the maximum is obtained nor how the setup of the FDSP affects the number of instructions. Thanks in advance for any help offered.