Difference in speed between sram datasheet and c language coding

jjangyja — Mon, 23 Jul 2018 05:51:39 GMT

void test_func()
{
unsigned int i = 0;

   for(i = 0;i < 52560;i++)
   {
    test_buffer_out[i] = test_buffer_in[i];
   }

i = 0;
}

byte : 52 KByte

for loop time : 5.576 ms !!!!!

and....

SRAM DataSheet

* Features

- Fast-clock-to-output times

8.0 ns (100-Mhz Version)

- 16bit Databus

8.0 ns (2 Byte Read/Write Speed)

8.0ns ===> 5.57 ms Calculate the capacity to process in 1.39 MB.

for loop : DataSheet

56 KB : 1.39 MB

Why is this big difference in capacity (byte)?

MPC5xxx中的主题 Difference in speed between sram datasheet and c language coding