Abstract: A data processor which may prevent data processing being executed from being analyzed based on the power consumption has been disclosed. A data processor (100) may include clock generating circuit (101), a random number generating circuit (102), a clock thinning-out circuit (103), and circuit resources (105 to 109). A clock signal (CLOCK A) may be thinned out by clock thinning out circuit (103) in correspondence to a random number generated by a random number generating circuit (102) to provide a clock signal (CLOCK C) to circuit resources (105 to 109). In this way, correct analysis of data processing being executed based on monitoring power consumption may be prevented.

Abstract: A data processor which may prevent data processing being executed from being analyzed based on the power consumption has been disclosed. A data processor (100) may include clock generating circuit (101), a random number generating circuit (102), a clock thinning-out circuit (103), and circuit resources (105 to 109). A clock signal (CLOCK A) may be thinned out by clock thinning out circuit (103) in correspondence to a random number generated by a random number generating circuit (102) to provide a clock signal (CLOCK C) to circuit resources (105 to 109). In this way, correct analysis of data processing being executed based on monitoring power consumption may be prevented.

Abstract: A microprocessor which can be used as a microprocessor with 8-bit A/D converter or 10-bit A/D converter is disclosed. Voltage comparator 2 compares the analog input signal AIN level with the reference voltage VREF, and then generates the comparative signal CP. The comparative signal CP is supplied to the serial conversion register 3 in order and is stored as the converted data DC. The upper 8 bits of the converted data DC stored in the serial conversion register 3 are supplied to the conversion result register 4A, and the lower 2 bits are supplied to the conversion result register 5A. In this way, in the case where this microprocessor is used as an microprocessor with a built-in 8-bit A/D converter, the microprocessor only ignores the contents of the conversion result register 5A.