Похоже на то... Очень похоже.
А из какого мануала это, если не секрет?
я нашел только вот, как-то мутно сказано.
UM1039_1.pdf 14.8
Цитата
The CPU and DMA engine operates at a higher clock frequency as compared to the SIE engine. The CPU cycles are valuable and so the CPU is given the highest priority. The CPU clock frequency is higher than the SIE operating frequency (12 MHz). The SIE will take 32 clock cycles for
a word transfer. In general, this time translates to more than 32 clock cycles of the CPU in which it can do easily several accesses to the memory.