Patent ID: 7143229

Claim:
A single-chip microcomputer comprising: a nonvolatile semiconductor memory device; write, read and erase circuits, connected to said nonvolatile semiconductor memory device, for performing a write operation, a read operation and an erase operation upon said nonvolatile semiconductor memory device, respectively; an interface; a sequencer, connected between said write, read and erase circuits and said interface, for receiving first data via said interface from another single-chip microcomputer under testing to write said first data into said nonvolatile semiconductor memory device, reading said first data from said nonvolatile semiconductor device to compare said first data with second data read via said interface from said another single-chip microcomputer thus performing a verification upon said nonvolatile semiconductor memory device, and reading third data from said nonvolatile semiconductor memory device and transmitting said third data via said interface to said another single-chip microcomputer.