Patent ID: 7698538
Filing Date: 2010-04-13
Classification: G06F

Abstract:
1. An apparatus for downloading a program in a system having a digital signal processor (DSP), comprising: an external memory for storing the program; a micro control unit (MCU) for controlling an overall operation of the system, sending a downloading command when a downloading key command is received from an external source, the downloading key command indicating a request to begin downloading of the program, and performing downloading of the program stored in the external memory when a downloading preparation signal is received; a program download control logic for receiving the downloading command from the MCU and in response to the downloading command, sending a hold request signal to the DSP and standing by till an operation completion signal is received from the DSP in response to the hold request signal, and transferring the downloading preparation signal to the MCU in response to the operation completion signal, and outputting a read/write mode selection control signal; and a multiplexer (MUX) connected with the DSP and the external memory for selecting a connection to the DSP or the external memory in response to the read/write mode selection control signal of the program download control logic; and an internal memory connected to an output of the multiplexer (MUX) for receiving and storing the downloaded program.