External non-volatile memory with additional functionality

An external non-volatile memory device including a rewritable non-volatile memory and a CMOS interface is disclosed. The interface includes a clock signal input to an external non-volatile memory device. The clock signal is multiplied by an integer to create a memory serdes clock for clocking outgoing data. The memory serdes clock is also used to create a clock for clocking incoming data from the main processing device. The external non-volatile memory device also includes an encryption/decryption block that encrypts data read from the non-volatile memory prior to transmitting the data through the interface, and decrypts data received from the interface prior to storing the data in the non-volatile memory. The encryption/decryption block may utilize a stream cipher. 公开了一种包括可重写非易失性存储器和CMOS接口的外部非易失性存储器设备。接口包括输入到外部非易失性存储器设备的时钟信号。该时钟信号乘以整数以创建用于对传出数据进行计时的存储器serdes时钟。存储器serdes时钟还用于创建用于对来自主处理设备的传入数据进行计时的时钟。外部非易失性存储器设备还包括加密/解密块，加密/解密块在通过接口传输数据之前对从非易失性存储器读取的数据进行加密，以及在将数据存储在非易失性存储器之前对从接口接收的数据进行解密。加密/解密块可利用流密码。