Code download in a system having multiple integrated circuits with a jtag capability

In a system including a plurality of integrated circuits (ICs) disposed on a printed circuit board, each IC comprising a memory for storing at least programming instructions, each further comprising a processor coupled to the memory for executing programming instructions stored in the memory;

• the system further including a single non-volatile memory disposed on the printed circuit board and coupled for memory access to only a first one of the plurality of ICs, a method of downloading code from the single non-volatile memory to each of the plurality of ICs, comprising:
• receiving, at a first one of the plurality of ICs, a first set of data from the single non-volatile memory;
• storing the first set of data in the memory of the first one of the plurality of ICs;
• receiving, at the first one of the plurality of ICs, a second set of data from the single non-volatile memory;
• transmitting the second set of data from the first one of the plurality of ICs to the second one of the plurality of ICs;
• and storing the second set of data in the memory of the second one of the plurality of ICs;
• wherein the first and second sets of data comprise program code.

An electronic product, comprising:

• a first integrated circuit having a first processor, a first internal memory, a first serial communication interface, and an external memory interface;
• an external memory coupled to the external memory interface;
• a second integrated circuit having second processor, a second internal memory, and a second serial communication interface, the second serial communication interface being coupled to the first serial communication interface;
• wherein the first integrated circuit, the external memory, and the second integrated circuit are disposed on a substrate.