Abstract: A complex memory chip is provided. The complex memory chip comprises a first pin, a second pin, a voltage generator, a flash memory, and a static random access memory (SRAM). The first pin is capable of transmitting a first voltage. The second pin is capable of transmitting a second voltage which is lower than the first voltage, so as to define a working voltage in association with the first voltage. The voltage generator generates a third voltage according to the first voltage, wherein the third voltage is greater than the first voltage. The flash memory and the SRAM operate under the working voltage. The flash memory erases data according to the third voltage.