求解，CC2540的8KB SRAM怎么只看到1KB？

cc2540是8K的RAM，这里应该说的是跟RATIO有关的吧

可是CC2540整个方框图只有这一处SRAM。CC2541可以看到有两块SRAM。

The 8-KB SRAM maps to the DATA memory space and to parts of the XDATA memory spaces. The SRAM is an ultralow-power SRAM that retains its contents even when the digital part is powered off (power modes 2 and 3).