Semiconductor device

A microcomputer on a semiconductor chip, comprising:

• a bus;
• a central processing unit coupled to the bus and having a MOS transistor;
• and
• a flash memory coupled to the bus and including:
• a plurality of nonvolatile memory cells each having a first gate and a second gate;
• a first driver coupled to the first gate of one of the plurality of nonvolatile memory cells;
• a second driver coupled to the second gate of the one of the plurality of nonvolatile memory cells;
• and
• a voltage generator which supplies a first voltage to the first driver and supplies a second voltage to the second driver,
• wherein a gate insulating film thickness of the first driver and a gate insulating film thickness of the MOS transistor in the central processing unit are less than that of the second driver.

An integrated data processor on a semiconductor chip, comprising:

• a bus;
• a central processing unit coupled to the bus and having a MOS transistor;
• and
• a flash memory coupled to the bus and including:
• a plurality of nonvolatile memory cells each having a first control gate and a second control gate;
• a plurality of word lines, a plurality of bit lines, a plurality of control lines, and a plurality of source lines coupled to the plurality of memory cells such that one word line, one bit line, one control line, and one source line are coupled to one nonvolatile memory cell;
• a first driver coupled to the first control gate of one of the plurality of nonvolatile memory cells via the corresponding word line;
• a second driver coupled to the second control gate of the one nonvolatile memory cell via the corresponding control line;
• and
• a voltage generator which supplies a first voltage to the first driver and supplies a second voltage to the second driver, and
• wherein a gate insulating film thickness of the first driver is less than that of the second driver.