Patent ID: 7421384
Filing Date: 2008-09-02
Classification: G06F

Abstract:
1. A semiconductor integrated circuit device used in connection to an external device during software development, comprising: a first microcomputer chip; and a second microcomputer chip having functional circuits substantially equivalent to the first microcomputer chip, the second microcomputer chip coupled to the external device for receiving and transmitting data; wherein the first microcomputer chip includes: wherein the second microcomputer chip includes: wherein the CPU of the first microcomputer chip is configured to be in a halt state and to control the switching circuit to couple the signal line from the JTAG circuit of the first microcomputer chip to the JTAG interface of the second microcomputer chip to thereby permit actuation of the motor control circuit by the second microcomputer chip while the CPU of the second microcomputer chip executes the instructions during the software development.