Patent ID: 8037282
Filing Date: 2011-10-11
Classification: G06F,Y02D

Abstract:
1. A register having a security function, the register comprising: a write security unit which outputs a first control signal controlling whether a write operation is permissible, in response to a write signal, an address signal, and a write permission signal; and a storage unit which writes and stores input data, in response to the first control signal, wherein the write permission signal is applied from an external source and indicates whether to protect the written data, and wherein the write security unit comprises: a first AND gate which receives the write signal and the address signal, logically sums the received signals, and outputs a result of the sum as a write selection signal; and a second AND gate which receives the write selection signal and the write permission signal, logically sums the received signals, and outputs a result of the sum as the first control signal.